Ecdsa does not protects against side-channel attacks. This is because Python does not provide side-channel secure primitives (with the exception of hmac.compare_digest()), making side-channel secure programming impossible. For a sophisticated attacker observing just one operation with a private key will be sufficient to completely reconstruct the private key.
https://pypi.org/project/ecdsa/#Security

The python-ecdsa library, which implements ECDSA cryptography in Python, is vulnerable to the Minerva attack (CVE-2024-23342). This vulnerability arises because scalar multiplication is not performed in constant time, affecting ECDSA signatures, key generation, and ECDH operations. ECDSA signature verification remains unaffected. The project maintainers have stated that there is no plan to release a fix for this vulnerability, citing their security policy:
"As stated in the security policy, side-channel vulnerabilities are outside the scope of the project. This is not due to a lack of interest in side-channel secure implementations but rather because the main goal of the project is to be pure Python. Implementing side-channel-free code in pure Python is impossible. Therefore, we do not plan to release a fix for this vulnerability."
NOTE: The specs we include in this advisory differ from the publicly available on other sources. That's because research by Safety CLI Cybersecurity Team confirms that there is no plan to address this vulnerability.

Prior to 3.1.6, an oversight in how the Jinja sandboxed environment interacts with the |attr filter allows an attacker that controls the content of a template to execute arbitrary Python code. To exploit the vulnerability, an attacker needs to control the content of a template. Whether that is the case depends on the type of application using Jinja. This vulnerability impacts users of applications which execute untrusted templates. Jinja's sandbox does catch calls to str.format and ensures they don't escape the sandbox. However, it's possible to use the |attr filter to get a reference to a string's plain format method, bypassing the sandbox. After the fix, the |attr filter no longer bypasses the environment's attribute lookup. This vulnerability is fixed in 3.1.6.

Ecdsa does not protects against side-channel attacks. This is because Python does not provide side-channel secure primitives (with the exception of hmac.compare_digest()), making side-channel secure programming impossible. For a sophisticated attacker observing just one operation with a private key will be sufficient to completely reconstruct the private key.
https://pypi.org/project/ecdsa/#Security

The python-ecdsa library, which implements ECDSA cryptography in Python, is vulnerable to the Minerva attack (CVE-2024-23342). This vulnerability arises because scalar multiplication is not performed in constant time, affecting ECDSA signatures, key generation, and ECDH operations. ECDSA signature verification remains unaffected. The project maintainers have stated that there is no plan to release a fix for this vulnerability, citing their security policy:
"As stated in the security policy, side-channel vulnerabilities are outside the scope of the project. This is not due to a lack of interest in side-channel secure implementations but rather because the main goal of the project is to be pure Python. Implementing side-channel-free code in pure Python is impossible. Therefore, we do not plan to release a fix for this vulnerability."
NOTE: The specs we include in this advisory differ from the publicly available on other sources. That's because research by Safety CLI Cybersecurity Team confirms that there is no plan to address this vulnerability.

Prior to 3.1.6, an oversight in how the Jinja sandboxed environment interacts with the |attr filter allows an attacker that controls the content of a template to execute arbitrary Python code. To exploit the vulnerability, an attacker needs to control the content of a template. Whether that is the case depends on the type of application using Jinja. This vulnerability impacts users of applications which execute untrusted templates. Jinja's sandbox does catch calls to str.format and ensures they don't escape the sandbox. However, it's possible to use the |attr filter to get a reference to a string's plain format method, bypassing the sandbox. After the fix, the |attr filter no longer bypasses the environment's attribute lookup. This vulnerability is fixed in 3.1.6.

Ecdsa does not protects against side-channel attacks. This is because Python does not provide side-channel secure primitives (with the exception of hmac.compare_digest()), making side-channel secure programming impossible. For a sophisticated attacker observing just one operation with a private key will be sufficient to completely reconstruct the private key.
https://pypi.org/project/ecdsa/#Security

The python-ecdsa library, which implements ECDSA cryptography in Python, is vulnerable to the Minerva attack (CVE-2024-23342). This vulnerability arises because scalar multiplication is not performed in constant time, affecting ECDSA signatures, key generation, and ECDH operations. ECDSA signature verification remains unaffected. The project maintainers have stated that there is no plan to release a fix for this vulnerability, citing their security policy:
"As stated in the security policy, side-channel vulnerabilities are outside the scope of the project. This is not due to a lack of interest in side-channel secure implementations but rather because the main goal of the project is to be pure Python. Implementing side-channel-free code in pure Python is impossible. Therefore, we do not plan to release a fix for this vulnerability."
NOTE: The specs we include in this advisory differ from the publicly available on other sources. That's because research by Safety CLI Cybersecurity Team confirms that there is no plan to address this vulnerability.

Prior to 3.1.6, an oversight in how the Jinja sandboxed environment interacts with the |attr filter allows an attacker that controls the content of a template to execute arbitrary Python code. To exploit the vulnerability, an attacker needs to control the content of a template. Whether that is the case depends on the type of application using Jinja. This vulnerability impacts users of applications which execute untrusted templates. Jinja's sandbox does catch calls to str.format and ensures they don't escape the sandbox. However, it's possible to use the |attr filter to get a reference to a string's plain format method, bypassing the sandbox. After the fix, the |attr filter no longer bypasses the environment's attribute lookup. This vulnerability is fixed in 3.1.6.

Ecdsa does not protects against side-channel attacks. This is because Python does not provide side-channel secure primitives (with the exception of hmac.compare_digest()), making side-channel secure programming impossible. For a sophisticated attacker observing just one operation with a private key will be sufficient to completely reconstruct the private key.
https://pypi.org/project/ecdsa/#Security

The python-ecdsa library, which implements ECDSA cryptography in Python, is vulnerable to the Minerva attack (CVE-2024-23342). This vulnerability arises because scalar multiplication is not performed in constant time, affecting ECDSA signatures, key generation, and ECDH operations. ECDSA signature verification remains unaffected. The project maintainers have stated that there is no plan to release a fix for this vulnerability, citing their security policy:
"As stated in the security policy, side-channel vulnerabilities are outside the scope of the project. This is not due to a lack of interest in side-channel secure implementations but rather because the main goal of the project is to be pure Python. Implementing side-channel-free code in pure Python is impossible. Therefore, we do not plan to release a fix for this vulnerability."
NOTE: The specs we include in this advisory differ from the publicly available on other sources. That's because research by Safety CLI Cybersecurity Team confirms that there is no plan to address this vulnerability.

Prior to 3.1.6, an oversight in how the Jinja sandboxed environment interacts with the |attr filter allows an attacker that controls the content of a template to execute arbitrary Python code. To exploit the vulnerability, an attacker needs to control the content of a template. Whether that is the case depends on the type of application using Jinja. This vulnerability impacts users of applications which execute untrusted templates. Jinja's sandbox does catch calls to str.format and ensures they don't escape the sandbox. However, it's possible to use the |attr filter to get a reference to a string's plain format method, bypassing the sandbox. After the fix, the |attr filter no longer bypasses the environment's attribute lookup. This vulnerability is fixed in 3.1.6.

Ecdsa does not protects against side-channel attacks. This is because Python does not provide side-channel secure primitives (with the exception of hmac.compare_digest()), making side-channel secure programming impossible. For a sophisticated attacker observing just one operation with a private key will be sufficient to completely reconstruct the private key.
https://pypi.org/project/ecdsa/#Security

The python-ecdsa library, which implements ECDSA cryptography in Python, is vulnerable to the Minerva attack (CVE-2024-23342). This vulnerability arises because scalar multiplication is not performed in constant time, affecting ECDSA signatures, key generation, and ECDH operations. ECDSA signature verification remains unaffected. The project maintainers have stated that there is no plan to release a fix for this vulnerability, citing their security policy:
"As stated in the security policy, side-channel vulnerabilities are outside the scope of the project. This is not due to a lack of interest in side-channel secure implementations but rather because the main goal of the project is to be pure Python. Implementing side-channel-free code in pure Python is impossible. Therefore, we do not plan to release a fix for this vulnerability."
NOTE: The specs we include in this advisory differ from the publicly available on other sources. That's because research by Safety CLI Cybersecurity Team confirms that there is no plan to address this vulnerability.

Ecdsa does not protects against side-channel attacks. This is because Python does not provide side-channel secure primitives (with the exception of hmac.compare_digest()), making side-channel secure programming impossible. For a sophisticated attacker observing just one operation with a private key will be sufficient to completely reconstruct the private key.
https://pypi.org/project/ecdsa/#Security

The python-ecdsa library, which implements ECDSA cryptography in Python, is vulnerable to the Minerva attack (CVE-2024-23342). This vulnerability arises because scalar multiplication is not performed in constant time, affecting ECDSA signatures, key generation, and ECDH operations. ECDSA signature verification remains unaffected. The project maintainers have stated that there is no plan to release a fix for this vulnerability, citing their security policy:
"As stated in the security policy, side-channel vulnerabilities are outside the scope of the project. This is not due to a lack of interest in side-channel secure implementations but rather because the main goal of the project is to be pure Python. Implementing side-channel-free code in pure Python is impossible. Therefore, we do not plan to release a fix for this vulnerability."
NOTE: The specs we include in this advisory differ from the publicly available on other sources. That's because research by Safety CLI Cybersecurity Team confirms that there is no plan to address this vulnerability.

Ecdsa does not protects against side-channel attacks. This is because Python does not provide side-channel secure primitives (with the exception of hmac.compare_digest()), making side-channel secure programming impossible. For a sophisticated attacker observing just one operation with a private key will be sufficient to completely reconstruct the private key.
https://pypi.org/project/ecdsa/#Security

The python-ecdsa library, which implements ECDSA cryptography in Python, is vulnerable to the Minerva attack (CVE-2024-23342). This vulnerability arises because scalar multiplication is not performed in constant time, affecting ECDSA signatures, key generation, and ECDH operations. ECDSA signature verification remains unaffected. The project maintainers have stated that there is no plan to release a fix for this vulnerability, citing their security policy:
"As stated in the security policy, side-channel vulnerabilities are outside the scope of the project. This is not due to a lack of interest in side-channel secure implementations but rather because the main goal of the project is to be pure Python. Implementing side-channel-free code in pure Python is impossible. Therefore, we do not plan to release a fix for this vulnerability."
NOTE: The specs we include in this advisory differ from the publicly available on other sources. That's because research by Safety CLI Cybersecurity Team confirms that there is no plan to address this vulnerability.

Ecdsa does not protects against side-channel attacks. This is because Python does not provide side-channel secure primitives (with the exception of hmac.compare_digest()), making side-channel secure programming impossible. For a sophisticated attacker observing just one operation with a private key will be sufficient to completely reconstruct the private key.
https://pypi.org/project/ecdsa/#Security

The python-ecdsa library, which implements ECDSA cryptography in Python, is vulnerable to the Minerva attack (CVE-2024-23342). This vulnerability arises because scalar multiplication is not performed in constant time, affecting ECDSA signatures, key generation, and ECDH operations. ECDSA signature verification remains unaffected. The project maintainers have stated that there is no plan to release a fix for this vulnerability, citing their security policy:
"As stated in the security policy, side-channel vulnerabilities are outside the scope of the project. This is not due to a lack of interest in side-channel secure implementations but rather because the main goal of the project is to be pure Python. Implementing side-channel-free code in pure Python is impossible. Therefore, we do not plan to release a fix for this vulnerability."
NOTE: The specs we include in this advisory differ from the publicly available on other sources. That's because research by Safety CLI Cybersecurity Team confirms that there is no plan to address this vulnerability.

** DISPUTED ** Py throughout 1.11.0 allows remote attackers to conduct a ReDoS (Regular expression Denial of Service) attack via a Subversion repository with crafted info data because the InfoSvnCommand argument is mishandled.
https://github.com/pytest-dev/py/issues/287

Ecdsa does not protects against side-channel attacks. This is because Python does not provide side-channel secure primitives (with the exception of hmac.compare_digest()), making side-channel secure programming impossible. For a sophisticated attacker observing just one operation with a private key will be sufficient to completely reconstruct the private key.
https://pypi.org/project/ecdsa/#Security

The python-ecdsa library, which implements ECDSA cryptography in Python, is vulnerable to the Minerva attack (CVE-2024-23342). This vulnerability arises because scalar multiplication is not performed in constant time, affecting ECDSA signatures, key generation, and ECDH operations. ECDSA signature verification remains unaffected. The project maintainers have stated that there is no plan to release a fix for this vulnerability, citing their security policy:
"As stated in the security policy, side-channel vulnerabilities are outside the scope of the project. This is not due to a lack of interest in side-channel secure implementations but rather because the main goal of the project is to be pure Python. Implementing side-channel-free code in pure Python is impossible. Therefore, we do not plan to release a fix for this vulnerability."
NOTE: The specs we include in this advisory differ from the publicly available on other sources. That's because research by Safety CLI Cybersecurity Team confirms that there is no plan to address this vulnerability.

Affected versions of Requests, when making requests through a Requests `Session`, if the first request is made with `verify=False` to disable cert verification, all subsequent requests to the same host will continue to ignore cert verification regardless of changes to the value of `verify`. This behavior will continue for the lifecycle of the connection in the connection pool. Requests 2.32.0 fixes the issue, but versions 2.32.0 and 2.32.1 were yanked due to conflicts with CVE-2024-35195 mitigation.

** DISPUTED ** Py throughout 1.11.0 allows remote attackers to conduct a ReDoS (Regular expression Denial of Service) attack via a Subversion repository with crafted info data because the InfoSvnCommand argument is mishandled.
https://github.com/pytest-dev/py/issues/287

Ecdsa does not protects against side-channel attacks. This is because Python does not provide side-channel secure primitives (with the exception of hmac.compare_digest()), making side-channel secure programming impossible. For a sophisticated attacker observing just one operation with a private key will be sufficient to completely reconstruct the private key.
https://pypi.org/project/ecdsa/#Security

The python-ecdsa library, which implements ECDSA cryptography in Python, is vulnerable to the Minerva attack (CVE-2024-23342). This vulnerability arises because scalar multiplication is not performed in constant time, affecting ECDSA signatures, key generation, and ECDH operations. ECDSA signature verification remains unaffected. The project maintainers have stated that there is no plan to release a fix for this vulnerability, citing their security policy:
"As stated in the security policy, side-channel vulnerabilities are outside the scope of the project. This is not due to a lack of interest in side-channel secure implementations but rather because the main goal of the project is to be pure Python. Implementing side-channel-free code in pure Python is impossible. Therefore, we do not plan to release a fix for this vulnerability."
NOTE: The specs we include in this advisory differ from the publicly available on other sources. That's because research by Safety CLI Cybersecurity Team confirms that there is no plan to address this vulnerability.

Affected versions of Requests, when making requests through a Requests `Session`, if the first request is made with `verify=False` to disable cert verification, all subsequent requests to the same host will continue to ignore cert verification regardless of changes to the value of `verify`. This behavior will continue for the lifecycle of the connection in the connection pool. Requests 2.32.0 fixes the issue, but versions 2.32.0 and 2.32.1 were yanked due to conflicts with CVE-2024-35195 mitigation.

** DISPUTED ** Py throughout 1.11.0 allows remote attackers to conduct a ReDoS (Regular expression Denial of Service) attack via a Subversion repository with crafted info data because the InfoSvnCommand argument is mishandled.
https://github.com/pytest-dev/py/issues/287

Ecdsa does not protects against side-channel attacks. This is because Python does not provide side-channel secure primitives (with the exception of hmac.compare_digest()), making side-channel secure programming impossible. For a sophisticated attacker observing just one operation with a private key will be sufficient to completely reconstruct the private key.
https://pypi.org/project/ecdsa/#Security

The python-ecdsa library, which implements ECDSA cryptography in Python, is vulnerable to the Minerva attack (CVE-2024-23342). This vulnerability arises because scalar multiplication is not performed in constant time, affecting ECDSA signatures, key generation, and ECDH operations. ECDSA signature verification remains unaffected. The project maintainers have stated that there is no plan to release a fix for this vulnerability, citing their security policy:
"As stated in the security policy, side-channel vulnerabilities are outside the scope of the project. This is not due to a lack of interest in side-channel secure implementations but rather because the main goal of the project is to be pure Python. Implementing side-channel-free code in pure Python is impossible. Therefore, we do not plan to release a fix for this vulnerability."
NOTE: The specs we include in this advisory differ from the publicly available on other sources. That's because research by Safety CLI Cybersecurity Team confirms that there is no plan to address this vulnerability.

Affected versions of Requests, when making requests through a Requests `Session`, if the first request is made with `verify=False` to disable cert verification, all subsequent requests to the same host will continue to ignore cert verification regardless of changes to the value of `verify`. This behavior will continue for the lifecycle of the connection in the connection pool. Requests 2.32.0 fixes the issue, but versions 2.32.0 and 2.32.1 were yanked due to conflicts with CVE-2024-35195 mitigation.

Affected versions of Cryptography have a vulnerable statically linked copy of OpenSSL included in cryptography wheels.

Cryptography 41.0.4 updates Windows, macOS, and Linux wheels to be compiled with OpenSSL 3.1.3, that includes a security fix.
https://github.com/pyca/cryptography/commit/fc11bce6930e591ce26a2317b31b9ce2b3e25512

The `cryptography` library updates its BoringSSL and OpenSSL dependencies in CI due to a security concern. Specifically, certain non-default TLS server configurations can cause unbounded memory growth when processing TLSv1.3 sessions, leading to a potential Denial of Service (DoS) attack. The issue arises when the `SSL_OP_NO_TICKET` option is used without early data support and default anti-replay protection. Under these conditions, the session cache can become misconfigured, preventing it from flushing properly and causing it to grow indefinitely. A malicious client can exploit this scenario to trigger a DoS attack, although it can also occur accidentally during normal operations. This vulnerability affects only TLS servers supporting TLSv1.3 and does not impact TLS clients. Additionally, the FIPS modules in versions 3.2, 3.1, and 3.0, as well as OpenSSL 1.0.2, are not affected by this issue.

Cryptography version 42.0.5 introduces a limit on the number of name constraint checks during X.509 path validation to prevent denial of service attacks.
https://github.com/pyca/cryptography/commit/4be53bf20cc90cbac01f5f94c5d1aecc5289ba1f

Versions of Cryptograph starting from 35.0.0 are susceptible to a security flaw in the POLY1305 MAC algorithm on PowerPC CPUs, which allows an attacker to disrupt the application's state. This disruption might result in false calculations or cause a denial of service. The vulnerability's exploitation hinges on the attacker's ability to alter the algorithm's application and the dependency of the software on non-volatile XMM registers.
https://github.com/pyca/cryptography/commit/89d0d56fb104ac4e0e6db63d78fc22b8c53d27e9

cryptography is a package designed to expose cryptographic primitives and recipes to Python developers. Starting in version 38.0.0 and before version 42.0.4, if `pkcs12.serialize_key_and_certificates` is called with both a certificate whose public key did not match the provided private key and an `encryption_algorithm` with `hmac_hash` set (via `PrivateFormat.PKCS12.encryption_builder().hmac_hash(...)`, then a NULL pointer dereference would occur, crashing the Python process. This has been resolved in version 42.0.4, the first version in which a `ValueError` is properly raised.

The cryptography library has updated its OpenSSL dependency in CI due to security concerns. This vulnerability arises when processing maliciously formatted PKCS12 files, which can cause OpenSSL to crash, leading to a potential Denial of Service (DoS) attack. PKCS12 files, often containing certificates and keys, may come from untrusted sources. The PKCS12 specification allows certain fields to be NULL, but OpenSSL does not correctly handle these cases, resulting in a NULL pointer dereference and subsequent crash. Applications using OpenSSL APIs, such as PKCS12_parse(), PKCS12_unpack_p7data(), PKCS12_unpack_p7encdata(), PKCS12_unpack_authsafes(), and PKCS12_newpass(), are vulnerable if they process PKCS12 files from untrusted sources. Although a similar issue in SMIME_write_PKCS7() was fixed, it is not considered significant for security as it pertains to data writing. This issue does not affect the FIPS modules in versions 3.2, 3.1, and 3.0.

Affected versions of Cryptography may allow a remote attacker to decrypt captured messages in TLS servers that use RSA key exchanges, which may lead to exposure of confidential or sensitive data.

Affected versions of Cryptography are vulnerable to NULL-dereference when loading PKCS7 certificates. Calling 'load_pem_pkcs7_certificates' or 'load_der_pkcs7_certificates' could lead to a NULL-pointer dereference and segfault. Exploitation of this vulnerability poses a serious risk of Denial of Service (DoS) for any application attempting to deserialize a PKCS7 blob/certificate. The consequences extend to potential disruptions in system availability and stability.

Cryptography 42.0.0 updates its bundled dependency 'OpenSSL' so to include the commit fix for CVE-2023-6237: Checking excessively long invalid RSA public keys may take a long time.

Cryptography starting from version 42.0.0 updates its CI configurations to use newer versions of BoringSSL or OpenSSL as a countermeasure to CVE-2023-5678. This vulnerability, affecting the package, could cause Denial of Service through specific DH key generation and verification functions when given overly long parameters.

Cryptography 41.0.5 updates Windows, macOS, and Linux wheels to be compiled with OpenSSL 3.1.4, that includes a security fix.

The `cryptography` library has updated its BoringSSL and OpenSSL dependencies in CI due to a security concern. Specifically, the issue involves the functions `EVP_PKEY_param_check()` and `EVP_PKEY_public_check()`, which are used to check DSA public keys or parameters. These functions can experience significant delays when processing excessively long DSA keys or parameters, potentially leading to a Denial of Service (DoS) if the input is from an untrusted source. The vulnerability arises because the key and parameter check functions do not limit the modulus size during checks, despite OpenSSL not allowing public keys with a modulus over 10,000 bits for signature verification. This issue affects applications that directly call these functions and the OpenSSL `pkey` and `pkeyparam` command-line applications with the `-check` option. The OpenSSL SSL/TLS implementation is not impacted, but the OpenSSL 3.0 and 3.1 FIPS providers are affected by this vulnerability.

** DISPUTED ** Py throughout 1.11.0 allows remote attackers to conduct a ReDoS (Regular expression Denial of Service) attack via a Subversion repository with crafted info data because the InfoSvnCommand argument is mishandled.
https://github.com/pytest-dev/py/issues/287

Ecdsa does not protects against side-channel attacks. This is because Python does not provide side-channel secure primitives (with the exception of hmac.compare_digest()), making side-channel secure programming impossible. For a sophisticated attacker observing just one operation with a private key will be sufficient to completely reconstruct the private key.
https://pypi.org/project/ecdsa/#Security

The python-ecdsa library, which implements ECDSA cryptography in Python, is vulnerable to the Minerva attack (CVE-2024-23342). This vulnerability arises because scalar multiplication is not performed in constant time, affecting ECDSA signatures, key generation, and ECDH operations. ECDSA signature verification remains unaffected. The project maintainers have stated that there is no plan to release a fix for this vulnerability, citing their security policy:
"As stated in the security policy, side-channel vulnerabilities are outside the scope of the project. This is not due to a lack of interest in side-channel secure implementations but rather because the main goal of the project is to be pure Python. Implementing side-channel-free code in pure Python is impossible. Therefore, we do not plan to release a fix for this vulnerability."
NOTE: The specs we include in this advisory differ from the publicly available on other sources. That's because research by Safety CLI Cybersecurity Team confirms that there is no plan to address this vulnerability.

Affected versions of Requests, when making requests through a Requests `Session`, if the first request is made with `verify=False` to disable cert verification, all subsequent requests to the same host will continue to ignore cert verification regardless of changes to the value of `verify`. This behavior will continue for the lifecycle of the connection in the connection pool. Requests 2.32.0 fixes the issue, but versions 2.32.0 and 2.32.1 were yanked due to conflicts with CVE-2024-35195 mitigation.

Affected versions of Cryptography have a vulnerable statically linked copy of OpenSSL included in cryptography wheels.

Cryptography 41.0.4 updates Windows, macOS, and Linux wheels to be compiled with OpenSSL 3.1.3, that includes a security fix.
https://github.com/pyca/cryptography/commit/fc11bce6930e591ce26a2317b31b9ce2b3e25512

The `cryptography` library updates its BoringSSL and OpenSSL dependencies in CI due to a security concern. Specifically, certain non-default TLS server configurations can cause unbounded memory growth when processing TLSv1.3 sessions, leading to a potential Denial of Service (DoS) attack. The issue arises when the `SSL_OP_NO_TICKET` option is used without early data support and default anti-replay protection. Under these conditions, the session cache can become misconfigured, preventing it from flushing properly and causing it to grow indefinitely. A malicious client can exploit this scenario to trigger a DoS attack, although it can also occur accidentally during normal operations. This vulnerability affects only TLS servers supporting TLSv1.3 and does not impact TLS clients. Additionally, the FIPS modules in versions 3.2, 3.1, and 3.0, as well as OpenSSL 1.0.2, are not affected by this issue.

Cryptography version 42.0.5 introduces a limit on the number of name constraint checks during X.509 path validation to prevent denial of service attacks.
https://github.com/pyca/cryptography/commit/4be53bf20cc90cbac01f5f94c5d1aecc5289ba1f

Versions of Cryptograph starting from 35.0.0 are susceptible to a security flaw in the POLY1305 MAC algorithm on PowerPC CPUs, which allows an attacker to disrupt the application's state. This disruption might result in false calculations or cause a denial of service. The vulnerability's exploitation hinges on the attacker's ability to alter the algorithm's application and the dependency of the software on non-volatile XMM registers.
https://github.com/pyca/cryptography/commit/89d0d56fb104ac4e0e6db63d78fc22b8c53d27e9

cryptography is a package designed to expose cryptographic primitives and recipes to Python developers. Starting in version 38.0.0 and before version 42.0.4, if `pkcs12.serialize_key_and_certificates` is called with both a certificate whose public key did not match the provided private key and an `encryption_algorithm` with `hmac_hash` set (via `PrivateFormat.PKCS12.encryption_builder().hmac_hash(...)`, then a NULL pointer dereference would occur, crashing the Python process. This has been resolved in version 42.0.4, the first version in which a `ValueError` is properly raised.

The cryptography library has updated its OpenSSL dependency in CI due to security concerns. This vulnerability arises when processing maliciously formatted PKCS12 files, which can cause OpenSSL to crash, leading to a potential Denial of Service (DoS) attack. PKCS12 files, often containing certificates and keys, may come from untrusted sources. The PKCS12 specification allows certain fields to be NULL, but OpenSSL does not correctly handle these cases, resulting in a NULL pointer dereference and subsequent crash. Applications using OpenSSL APIs, such as PKCS12_parse(), PKCS12_unpack_p7data(), PKCS12_unpack_p7encdata(), PKCS12_unpack_authsafes(), and PKCS12_newpass(), are vulnerable if they process PKCS12 files from untrusted sources. Although a similar issue in SMIME_write_PKCS7() was fixed, it is not considered significant for security as it pertains to data writing. This issue does not affect the FIPS modules in versions 3.2, 3.1, and 3.0.

Affected versions of Cryptography may allow a remote attacker to decrypt captured messages in TLS servers that use RSA key exchanges, which may lead to exposure of confidential or sensitive data.

Affected versions of Cryptography are vulnerable to NULL-dereference when loading PKCS7 certificates. Calling 'load_pem_pkcs7_certificates' or 'load_der_pkcs7_certificates' could lead to a NULL-pointer dereference and segfault. Exploitation of this vulnerability poses a serious risk of Denial of Service (DoS) for any application attempting to deserialize a PKCS7 blob/certificate. The consequences extend to potential disruptions in system availability and stability.

Cryptography 42.0.0 updates its bundled dependency 'OpenSSL' so to include the commit fix for CVE-2023-6237: Checking excessively long invalid RSA public keys may take a long time.

Cryptography starting from version 42.0.0 updates its CI configurations to use newer versions of BoringSSL or OpenSSL as a countermeasure to CVE-2023-5678. This vulnerability, affecting the package, could cause Denial of Service through specific DH key generation and verification functions when given overly long parameters.

Cryptography 41.0.5 updates Windows, macOS, and Linux wheels to be compiled with OpenSSL 3.1.4, that includes a security fix.

The `cryptography` library has updated its BoringSSL and OpenSSL dependencies in CI due to a security concern. Specifically, the issue involves the functions `EVP_PKEY_param_check()` and `EVP_PKEY_public_check()`, which are used to check DSA public keys or parameters. These functions can experience significant delays when processing excessively long DSA keys or parameters, potentially leading to a Denial of Service (DoS) if the input is from an untrusted source. The vulnerability arises because the key and parameter check functions do not limit the modulus size during checks, despite OpenSSL not allowing public keys with a modulus over 10,000 bits for signature verification. This issue affects applications that directly call these functions and the OpenSSL `pkey` and `pkeyparam` command-line applications with the `-check` option. The OpenSSL SSL/TLS implementation is not impacted, but the OpenSSL 3.0 and 3.1 FIPS providers are affected by this vulnerability.

** DISPUTED ** Py throughout 1.11.0 allows remote attackers to conduct a ReDoS (Regular expression Denial of Service) attack via a Subversion repository with crafted info data because the InfoSvnCommand argument is mishandled.
https://github.com/pytest-dev/py/issues/287

Ecdsa does not protects against side-channel attacks. This is because Python does not provide side-channel secure primitives (with the exception of hmac.compare_digest()), making side-channel secure programming impossible. For a sophisticated attacker observing just one operation with a private key will be sufficient to completely reconstruct the private key.
https://pypi.org/project/ecdsa/#Security

The python-ecdsa library, which implements ECDSA cryptography in Python, is vulnerable to the Minerva attack (CVE-2024-23342). This vulnerability arises because scalar multiplication is not performed in constant time, affecting ECDSA signatures, key generation, and ECDH operations. ECDSA signature verification remains unaffected. The project maintainers have stated that there is no plan to release a fix for this vulnerability, citing their security policy:
"As stated in the security policy, side-channel vulnerabilities are outside the scope of the project. This is not due to a lack of interest in side-channel secure implementations but rather because the main goal of the project is to be pure Python. Implementing side-channel-free code in pure Python is impossible. Therefore, we do not plan to release a fix for this vulnerability."
NOTE: The specs we include in this advisory differ from the publicly available on other sources. That's because research by Safety CLI Cybersecurity Team confirms that there is no plan to address this vulnerability.

Affected versions of Requests, when making requests through a Requests `Session`, if the first request is made with `verify=False` to disable cert verification, all subsequent requests to the same host will continue to ignore cert verification regardless of changes to the value of `verify`. This behavior will continue for the lifecycle of the connection in the connection pool. Requests 2.32.0 fixes the issue, but versions 2.32.0 and 2.32.1 were yanked due to conflicts with CVE-2024-35195 mitigation.

Affected versions of Cryptography have a vulnerable statically linked copy of OpenSSL included in cryptography wheels.

Cryptography 41.0.4 updates Windows, macOS, and Linux wheels to be compiled with OpenSSL 3.1.3, that includes a security fix.
https://github.com/pyca/cryptography/commit/fc11bce6930e591ce26a2317b31b9ce2b3e25512

The `cryptography` library updates its BoringSSL and OpenSSL dependencies in CI due to a security concern. Specifically, certain non-default TLS server configurations can cause unbounded memory growth when processing TLSv1.3 sessions, leading to a potential Denial of Service (DoS) attack. The issue arises when the `SSL_OP_NO_TICKET` option is used without early data support and default anti-replay protection. Under these conditions, the session cache can become misconfigured, preventing it from flushing properly and causing it to grow indefinitely. A malicious client can exploit this scenario to trigger a DoS attack, although it can also occur accidentally during normal operations. This vulnerability affects only TLS servers supporting TLSv1.3 and does not impact TLS clients. Additionally, the FIPS modules in versions 3.2, 3.1, and 3.0, as well as OpenSSL 1.0.2, are not affected by this issue.

Cryptography version 42.0.5 introduces a limit on the number of name constraint checks during X.509 path validation to prevent denial of service attacks.
https://github.com/pyca/cryptography/commit/4be53bf20cc90cbac01f5f94c5d1aecc5289ba1f

Versions of Cryptograph starting from 35.0.0 are susceptible to a security flaw in the POLY1305 MAC algorithm on PowerPC CPUs, which allows an attacker to disrupt the application's state. This disruption might result in false calculations or cause a denial of service. The vulnerability's exploitation hinges on the attacker's ability to alter the algorithm's application and the dependency of the software on non-volatile XMM registers.
https://github.com/pyca/cryptography/commit/89d0d56fb104ac4e0e6db63d78fc22b8c53d27e9

cryptography is a package designed to expose cryptographic primitives and recipes to Python developers. Starting in version 38.0.0 and before version 42.0.4, if `pkcs12.serialize_key_and_certificates` is called with both a certificate whose public key did not match the provided private key and an `encryption_algorithm` with `hmac_hash` set (via `PrivateFormat.PKCS12.encryption_builder().hmac_hash(...)`, then a NULL pointer dereference would occur, crashing the Python process. This has been resolved in version 42.0.4, the first version in which a `ValueError` is properly raised.

The cryptography library has updated its OpenSSL dependency in CI due to security concerns. This vulnerability arises when processing maliciously formatted PKCS12 files, which can cause OpenSSL to crash, leading to a potential Denial of Service (DoS) attack. PKCS12 files, often containing certificates and keys, may come from untrusted sources. The PKCS12 specification allows certain fields to be NULL, but OpenSSL does not correctly handle these cases, resulting in a NULL pointer dereference and subsequent crash. Applications using OpenSSL APIs, such as PKCS12_parse(), PKCS12_unpack_p7data(), PKCS12_unpack_p7encdata(), PKCS12_unpack_authsafes(), and PKCS12_newpass(), are vulnerable if they process PKCS12 files from untrusted sources. Although a similar issue in SMIME_write_PKCS7() was fixed, it is not considered significant for security as it pertains to data writing. This issue does not affect the FIPS modules in versions 3.2, 3.1, and 3.0.

Affected versions of Cryptography may allow a remote attacker to decrypt captured messages in TLS servers that use RSA key exchanges, which may lead to exposure of confidential or sensitive data.

Affected versions of Cryptography are vulnerable to NULL-dereference when loading PKCS7 certificates. Calling 'load_pem_pkcs7_certificates' or 'load_der_pkcs7_certificates' could lead to a NULL-pointer dereference and segfault. Exploitation of this vulnerability poses a serious risk of Denial of Service (DoS) for any application attempting to deserialize a PKCS7 blob/certificate. The consequences extend to potential disruptions in system availability and stability.

Cryptography 42.0.0 updates its bundled dependency 'OpenSSL' so to include the commit fix for CVE-2023-6237: Checking excessively long invalid RSA public keys may take a long time.

Cryptography starting from version 42.0.0 updates its CI configurations to use newer versions of BoringSSL or OpenSSL as a countermeasure to CVE-2023-5678. This vulnerability, affecting the package, could cause Denial of Service through specific DH key generation and verification functions when given overly long parameters.

Cryptography 41.0.5 updates Windows, macOS, and Linux wheels to be compiled with OpenSSL 3.1.4, that includes a security fix.

The `cryptography` library has updated its BoringSSL and OpenSSL dependencies in CI due to a security concern. Specifically, the issue involves the functions `EVP_PKEY_param_check()` and `EVP_PKEY_public_check()`, which are used to check DSA public keys or parameters. These functions can experience significant delays when processing excessively long DSA keys or parameters, potentially leading to a Denial of Service (DoS) if the input is from an untrusted source. The vulnerability arises because the key and parameter check functions do not limit the modulus size during checks, despite OpenSSL not allowing public keys with a modulus over 10,000 bits for signature verification. This issue affects applications that directly call these functions and the OpenSSL `pkey` and `pkeyparam` command-line applications with the `-check` option. The OpenSSL SSL/TLS implementation is not impacted, but the OpenSSL 3.0 and 3.1 FIPS providers are affected by this vulnerability.

** DISPUTED ** Py throughout 1.11.0 allows remote attackers to conduct a ReDoS (Regular expression Denial of Service) attack via a Subversion repository with crafted info data because the InfoSvnCommand argument is mishandled.
https://github.com/pytest-dev/py/issues/287

Ecdsa does not protects against side-channel attacks. This is because Python does not provide side-channel secure primitives (with the exception of hmac.compare_digest()), making side-channel secure programming impossible. For a sophisticated attacker observing just one operation with a private key will be sufficient to completely reconstruct the private key.
https://pypi.org/project/ecdsa/#Security

The python-ecdsa library, which implements ECDSA cryptography in Python, is vulnerable to the Minerva attack (CVE-2024-23342). This vulnerability arises because scalar multiplication is not performed in constant time, affecting ECDSA signatures, key generation, and ECDH operations. ECDSA signature verification remains unaffected. The project maintainers have stated that there is no plan to release a fix for this vulnerability, citing their security policy:
"As stated in the security policy, side-channel vulnerabilities are outside the scope of the project. This is not due to a lack of interest in side-channel secure implementations but rather because the main goal of the project is to be pure Python. Implementing side-channel-free code in pure Python is impossible. Therefore, we do not plan to release a fix for this vulnerability."
NOTE: The specs we include in this advisory differ from the publicly available on other sources. That's because research by Safety CLI Cybersecurity Team confirms that there is no plan to address this vulnerability.

Grpcio 1.53.2, 1.54.3, 1.55.3 and 1.56.2 include a fix for CVE-2023-4785: Lack of error handling in the TCP server in Google's gRPC starting version 1.23 on posix-compatible platforms (ex. Linux) allows an attacker to cause a denial of service by initiating a significant number of connections with the server. Note that gRPC C++ Python, and Ruby are affected, but gRPC Java, and Go are NOT affected.
https://github.com/grpc/grpc/pull/33656

gRPC has a vulnerability linked to hpack table accounting errors, causing potential unwanted disconnects between clients and servers. Identified vectors include unbounded memory buffering and CPU consumption within the HPACK parser, leading to denial-of-service (DOS) attacks. The CPU issue stems from excessive copying, resulting in inefficient parsing. Memory issues arise from delayed header size checks, allowing large strings to be buffered, and a quirk in HPACK's integer encoding, permitting infinite zero-padding. Additionally, metadata overflow checks per frame could enable infinite buffering, compromising gRPC's stability and security.

Grpcio 1.53.2, 1.54.3, 1.55.3 and 1.56.2 include a fix for CVE-2023-4785: Lack of error handling in the TCP server in Google's gRPC starting version 1.23 on posix-compatible platforms (ex. Linux) allows an attacker to cause a denial of service by initiating a significant number of connections with the server. Note that gRPC C++ Python, and Ruby are affected, but gRPC Java, and Go are NOT affected.
https://github.com/grpc/grpc/pull/33656

gRPC has a vulnerability linked to hpack table accounting errors, causing potential unwanted disconnects between clients and servers. Identified vectors include unbounded memory buffering and CPU consumption within the HPACK parser, leading to denial-of-service (DOS) attacks. The CPU issue stems from excessive copying, resulting in inefficient parsing. Memory issues arise from delayed header size checks, allowing large strings to be buffered, and a quirk in HPACK's integer encoding, permitting infinite zero-padding. Additionally, metadata overflow checks per frame could enable infinite buffering, compromising gRPC's stability and security.

Affected versions of Requests, when making requests through a Requests `Session`, if the first request is made with `verify=False` to disable cert verification, all subsequent requests to the same host will continue to ignore cert verification regardless of changes to the value of `verify`. This behavior will continue for the lifecycle of the connection in the connection pool. Requests 2.32.0 fixes the issue, but versions 2.32.0 and 2.32.1 were yanked due to conflicts with CVE-2024-35195 mitigation.

Affected versions of Cryptography have a vulnerable statically linked copy of OpenSSL included in cryptography wheels.

Cryptography 41.0.4 updates Windows, macOS, and Linux wheels to be compiled with OpenSSL 3.1.3, that includes a security fix.
https://github.com/pyca/cryptography/commit/fc11bce6930e591ce26a2317b31b9ce2b3e25512

The `cryptography` library updates its BoringSSL and OpenSSL dependencies in CI due to a security concern. Specifically, certain non-default TLS server configurations can cause unbounded memory growth when processing TLSv1.3 sessions, leading to a potential Denial of Service (DoS) attack. The issue arises when the `SSL_OP_NO_TICKET` option is used without early data support and default anti-replay protection. Under these conditions, the session cache can become misconfigured, preventing it from flushing properly and causing it to grow indefinitely. A malicious client can exploit this scenario to trigger a DoS attack, although it can also occur accidentally during normal operations. This vulnerability affects only TLS servers supporting TLSv1.3 and does not impact TLS clients. Additionally, the FIPS modules in versions 3.2, 3.1, and 3.0, as well as OpenSSL 1.0.2, are not affected by this issue.

Cryptography version 42.0.5 introduces a limit on the number of name constraint checks during X.509 path validation to prevent denial of service attacks.
https://github.com/pyca/cryptography/commit/4be53bf20cc90cbac01f5f94c5d1aecc5289ba1f

Versions of Cryptograph starting from 35.0.0 are susceptible to a security flaw in the POLY1305 MAC algorithm on PowerPC CPUs, which allows an attacker to disrupt the application's state. This disruption might result in false calculations or cause a denial of service. The vulnerability's exploitation hinges on the attacker's ability to alter the algorithm's application and the dependency of the software on non-volatile XMM registers.
https://github.com/pyca/cryptography/commit/89d0d56fb104ac4e0e6db63d78fc22b8c53d27e9

cryptography is a package designed to expose cryptographic primitives and recipes to Python developers. Starting in version 38.0.0 and before version 42.0.4, if `pkcs12.serialize_key_and_certificates` is called with both a certificate whose public key did not match the provided private key and an `encryption_algorithm` with `hmac_hash` set (via `PrivateFormat.PKCS12.encryption_builder().hmac_hash(...)`, then a NULL pointer dereference would occur, crashing the Python process. This has been resolved in version 42.0.4, the first version in which a `ValueError` is properly raised.

The cryptography library has updated its OpenSSL dependency in CI due to security concerns. This vulnerability arises when processing maliciously formatted PKCS12 files, which can cause OpenSSL to crash, leading to a potential Denial of Service (DoS) attack. PKCS12 files, often containing certificates and keys, may come from untrusted sources. The PKCS12 specification allows certain fields to be NULL, but OpenSSL does not correctly handle these cases, resulting in a NULL pointer dereference and subsequent crash. Applications using OpenSSL APIs, such as PKCS12_parse(), PKCS12_unpack_p7data(), PKCS12_unpack_p7encdata(), PKCS12_unpack_authsafes(), and PKCS12_newpass(), are vulnerable if they process PKCS12 files from untrusted sources. Although a similar issue in SMIME_write_PKCS7() was fixed, it is not considered significant for security as it pertains to data writing. This issue does not affect the FIPS modules in versions 3.2, 3.1, and 3.0.

Affected versions of Cryptography may allow a remote attacker to decrypt captured messages in TLS servers that use RSA key exchanges, which may lead to exposure of confidential or sensitive data.

Affected versions of Cryptography are vulnerable to NULL-dereference when loading PKCS7 certificates. Calling 'load_pem_pkcs7_certificates' or 'load_der_pkcs7_certificates' could lead to a NULL-pointer dereference and segfault. Exploitation of this vulnerability poses a serious risk of Denial of Service (DoS) for any application attempting to deserialize a PKCS7 blob/certificate. The consequences extend to potential disruptions in system availability and stability.

Cryptography 42.0.0 updates its bundled dependency 'OpenSSL' so to include the commit fix for CVE-2023-6237: Checking excessively long invalid RSA public keys may take a long time.

Cryptography starting from version 42.0.0 updates its CI configurations to use newer versions of BoringSSL or OpenSSL as a countermeasure to CVE-2023-5678. This vulnerability, affecting the package, could cause Denial of Service through specific DH key generation and verification functions when given overly long parameters.

Cryptography 41.0.5 updates Windows, macOS, and Linux wheels to be compiled with OpenSSL 3.1.4, that includes a security fix.

The `cryptography` library has updated its BoringSSL and OpenSSL dependencies in CI due to a security concern. Specifically, the issue involves the functions `EVP_PKEY_param_check()` and `EVP_PKEY_public_check()`, which are used to check DSA public keys or parameters. These functions can experience significant delays when processing excessively long DSA keys or parameters, potentially leading to a Denial of Service (DoS) if the input is from an untrusted source. The vulnerability arises because the key and parameter check functions do not limit the modulus size during checks, despite OpenSSL not allowing public keys with a modulus over 10,000 bits for signature verification. This issue affects applications that directly call these functions and the OpenSSL `pkey` and `pkeyparam` command-line applications with the `-check` option. The OpenSSL SSL/TLS implementation is not impacted, but the OpenSSL 3.0 and 3.1 FIPS providers are affected by this vulnerability.

** DISPUTED ** Py throughout 1.11.0 allows remote attackers to conduct a ReDoS (Regular expression Denial of Service) attack via a Subversion repository with crafted info data because the InfoSvnCommand argument is mishandled.
https://github.com/pytest-dev/py/issues/287

Ecdsa does not protects against side-channel attacks. This is because Python does not provide side-channel secure primitives (with the exception of hmac.compare_digest()), making side-channel secure programming impossible. For a sophisticated attacker observing just one operation with a private key will be sufficient to completely reconstruct the private key.
https://pypi.org/project/ecdsa/#Security

The python-ecdsa library, which implements ECDSA cryptography in Python, is vulnerable to the Minerva attack (CVE-2024-23342). This vulnerability arises because scalar multiplication is not performed in constant time, affecting ECDSA signatures, key generation, and ECDH operations. ECDSA signature verification remains unaffected. The project maintainers have stated that there is no plan to release a fix for this vulnerability, citing their security policy:
"As stated in the security policy, side-channel vulnerabilities are outside the scope of the project. This is not due to a lack of interest in side-channel secure implementations but rather because the main goal of the project is to be pure Python. Implementing side-channel-free code in pure Python is impossible. Therefore, we do not plan to release a fix for this vulnerability."
NOTE: The specs we include in this advisory differ from the publicly available on other sources. That's because research by Safety CLI Cybersecurity Team confirms that there is no plan to address this vulnerability.

Grpcio 1.53.2, 1.54.3, 1.55.3 and 1.56.2 include a fix for CVE-2023-4785: Lack of error handling in the TCP server in Google's gRPC starting version 1.23 on posix-compatible platforms (ex. Linux) allows an attacker to cause a denial of service by initiating a significant number of connections with the server. Note that gRPC C++ Python, and Ruby are affected, but gRPC Java, and Go are NOT affected.
https://github.com/grpc/grpc/pull/33656

Grpcio 1.53.0 includes a fix for a Connection Confusion vulnerability. When gRPC HTTP2 stack raised a header size exceeded error, it skipped parsing the rest of the HPACK frame. This caused any HPACK table mutations to also be skipped, resulting in a desynchronization of HPACK tables between sender and receiver. If leveraged, say, between a proxy and a backend, this could lead to requests from the proxy being interpreted as containing headers from different proxy clients - leading to an information leak that can be used for privilege escalation or data exfiltration.
https://github.com/advisories/GHSA-cfgp-2977-2fmm

Grpcio 1.53.0 includes a fix for a Reachable Assertion vulnerability. 
https://github.com/advisories/GHSA-6628-q6j9-w8vg

gRPC contains a vulnerability whereby a client can cause a termination of connection between a HTTP2 proxy and a gRPC server: a base64 encoding error for `-bin` suffixed headers will result in a disconnection by the gRPC server, but is typically allowed by HTTP2 proxies.

gRPC has a vulnerability linked to hpack table accounting errors, causing potential unwanted disconnects between clients and servers. Identified vectors include unbounded memory buffering and CPU consumption within the HPACK parser, leading to denial-of-service (DOS) attacks. The CPU issue stems from excessive copying, resulting in inefficient parsing. Memory issues arise from delayed header size checks, allowing large strings to be buffered, and a quirk in HPACK's integer encoding, permitting infinite zero-padding. Additionally, metadata overflow checks per frame could enable infinite buffering, compromising gRPC's stability and security.

Grpcio 1.53.2, 1.54.3, 1.55.3 and 1.56.2 include a fix for CVE-2023-4785: Lack of error handling in the TCP server in Google's gRPC starting version 1.23 on posix-compatible platforms (ex. Linux) allows an attacker to cause a denial of service by initiating a significant number of connections with the server. Note that gRPC C++ Python, and Ruby are affected, but gRPC Java, and Go are NOT affected.
https://github.com/grpc/grpc/pull/33656

Grpcio 1.53.0 includes a fix for a Connection Confusion vulnerability. When gRPC HTTP2 stack raised a header size exceeded error, it skipped parsing the rest of the HPACK frame. This caused any HPACK table mutations to also be skipped, resulting in a desynchronization of HPACK tables between sender and receiver. If leveraged, say, between a proxy and a backend, this could lead to requests from the proxy being interpreted as containing headers from different proxy clients - leading to an information leak that can be used for privilege escalation or data exfiltration.
https://github.com/advisories/GHSA-cfgp-2977-2fmm

Grpcio 1.53.0 includes a fix for a Reachable Assertion vulnerability. 
https://github.com/advisories/GHSA-6628-q6j9-w8vg

gRPC contains a vulnerability whereby a client can cause a termination of connection between a HTTP2 proxy and a gRPC server: a base64 encoding error for `-bin` suffixed headers will result in a disconnection by the gRPC server, but is typically allowed by HTTP2 proxies.

gRPC has a vulnerability linked to hpack table accounting errors, causing potential unwanted disconnects between clients and servers. Identified vectors include unbounded memory buffering and CPU consumption within the HPACK parser, leading to denial-of-service (DOS) attacks. The CPU issue stems from excessive copying, resulting in inefficient parsing. Memory issues arise from delayed header size checks, allowing large strings to be buffered, and a quirk in HPACK's integer encoding, permitting infinite zero-padding. Additionally, metadata overflow checks per frame could enable infinite buffering, compromising gRPC's stability and security.

Affected versions of Requests, when making requests through a Requests `Session`, if the first request is made with `verify=False` to disable cert verification, all subsequent requests to the same host will continue to ignore cert verification regardless of changes to the value of `verify`. This behavior will continue for the lifecycle of the connection in the connection pool. Requests 2.32.0 fixes the issue, but versions 2.32.0 and 2.32.1 were yanked due to conflicts with CVE-2024-35195 mitigation.

Affected versions of Cryptography have a vulnerable statically linked copy of OpenSSL included in cryptography wheels.

Cryptography 41.0.4 updates Windows, macOS, and Linux wheels to be compiled with OpenSSL 3.1.3, that includes a security fix.
https://github.com/pyca/cryptography/commit/fc11bce6930e591ce26a2317b31b9ce2b3e25512

The `cryptography` library updates its BoringSSL and OpenSSL dependencies in CI due to a security concern. Specifically, certain non-default TLS server configurations can cause unbounded memory growth when processing TLSv1.3 sessions, leading to a potential Denial of Service (DoS) attack. The issue arises when the `SSL_OP_NO_TICKET` option is used without early data support and default anti-replay protection. Under these conditions, the session cache can become misconfigured, preventing it from flushing properly and causing it to grow indefinitely. A malicious client can exploit this scenario to trigger a DoS attack, although it can also occur accidentally during normal operations. This vulnerability affects only TLS servers supporting TLSv1.3 and does not impact TLS clients. Additionally, the FIPS modules in versions 3.2, 3.1, and 3.0, as well as OpenSSL 1.0.2, are not affected by this issue.

Cryptography version 42.0.5 introduces a limit on the number of name constraint checks during X.509 path validation to prevent denial of service attacks.
https://github.com/pyca/cryptography/commit/4be53bf20cc90cbac01f5f94c5d1aecc5289ba1f

Versions of Cryptograph starting from 35.0.0 are susceptible to a security flaw in the POLY1305 MAC algorithm on PowerPC CPUs, which allows an attacker to disrupt the application's state. This disruption might result in false calculations or cause a denial of service. The vulnerability's exploitation hinges on the attacker's ability to alter the algorithm's application and the dependency of the software on non-volatile XMM registers.
https://github.com/pyca/cryptography/commit/89d0d56fb104ac4e0e6db63d78fc22b8c53d27e9

cryptography is a package designed to expose cryptographic primitives and recipes to Python developers. Starting in version 38.0.0 and before version 42.0.4, if `pkcs12.serialize_key_and_certificates` is called with both a certificate whose public key did not match the provided private key and an `encryption_algorithm` with `hmac_hash` set (via `PrivateFormat.PKCS12.encryption_builder().hmac_hash(...)`, then a NULL pointer dereference would occur, crashing the Python process. This has been resolved in version 42.0.4, the first version in which a `ValueError` is properly raised.

The cryptography library has updated its OpenSSL dependency in CI due to security concerns. This vulnerability arises when processing maliciously formatted PKCS12 files, which can cause OpenSSL to crash, leading to a potential Denial of Service (DoS) attack. PKCS12 files, often containing certificates and keys, may come from untrusted sources. The PKCS12 specification allows certain fields to be NULL, but OpenSSL does not correctly handle these cases, resulting in a NULL pointer dereference and subsequent crash. Applications using OpenSSL APIs, such as PKCS12_parse(), PKCS12_unpack_p7data(), PKCS12_unpack_p7encdata(), PKCS12_unpack_authsafes(), and PKCS12_newpass(), are vulnerable if they process PKCS12 files from untrusted sources. Although a similar issue in SMIME_write_PKCS7() was fixed, it is not considered significant for security as it pertains to data writing. This issue does not affect the FIPS modules in versions 3.2, 3.1, and 3.0.

Affected versions of Cryptography may allow a remote attacker to decrypt captured messages in TLS servers that use RSA key exchanges, which may lead to exposure of confidential or sensitive data.

Affected versions of Cryptography are vulnerable to NULL-dereference when loading PKCS7 certificates. Calling 'load_pem_pkcs7_certificates' or 'load_der_pkcs7_certificates' could lead to a NULL-pointer dereference and segfault. Exploitation of this vulnerability poses a serious risk of Denial of Service (DoS) for any application attempting to deserialize a PKCS7 blob/certificate. The consequences extend to potential disruptions in system availability and stability.

Cryptography 42.0.0 updates its bundled dependency 'OpenSSL' so to include the commit fix for CVE-2023-6237: Checking excessively long invalid RSA public keys may take a long time.

Cryptography starting from version 42.0.0 updates its CI configurations to use newer versions of BoringSSL or OpenSSL as a countermeasure to CVE-2023-5678. This vulnerability, affecting the package, could cause Denial of Service through specific DH key generation and verification functions when given overly long parameters.

Cryptography 41.0.5 updates Windows, macOS, and Linux wheels to be compiled with OpenSSL 3.1.4, that includes a security fix.

The `cryptography` library has updated its BoringSSL and OpenSSL dependencies in CI due to a security concern. Specifically, the issue involves the functions `EVP_PKEY_param_check()` and `EVP_PKEY_public_check()`, which are used to check DSA public keys or parameters. These functions can experience significant delays when processing excessively long DSA keys or parameters, potentially leading to a Denial of Service (DoS) if the input is from an untrusted source. The vulnerability arises because the key and parameter check functions do not limit the modulus size during checks, despite OpenSSL not allowing public keys with a modulus over 10,000 bits for signature verification. This issue affects applications that directly call these functions and the OpenSSL `pkey` and `pkeyparam` command-line applications with the `-check` option. The OpenSSL SSL/TLS implementation is not impacted, but the OpenSSL 3.0 and 3.1 FIPS providers are affected by this vulnerability.