CVE-2018-1000807

Advisory

Pyopenssl 17.5.0 includes a fix for CVE-2018-1000807: Use After Free vulnerability in X509 object handling that can possibly lead to denial of service or remote code execution. This attack appears to be exploitable via 'Depends' on the calling application and if it retains a reference to the memory.
#NOTE: The data we include in this advisory differs from the publicly available on nvd.nist.gov. 'cryptography' dependency was introduced in release 0.14a2.
https://github.com/pyca/pyopenssl/commit/5d97b41cc68f05b63137622b2e6d2398834ba583
https://github.com/pyca/pyopenssl/pull/723

Affected package

Affected versions

Fixed versions

Vulnerability changelog

Python Cryptographic Authority pyopenssl version prior to version 17.5.0 contains a CWE-416: Use After Free vulnerability in X509 object handling that can result in Use after free can lead to possible denial of service or remote code execution.. This attack appear to be exploitable via Depends on the calling application and if it retains a reference to the memory.. This vulnerability appears to have been fixed in 17.5.0.


CONFIRM:https://github.com/pyca/pyopenssl/pull/723: https://github.com/pyca/pyopenssl/pull/723

Resources

• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-1000807
• https://github.com/pyca/pyopenssl/pull/723
• https://usn.ubuntu.com/3813-1/
• https://access.redhat.com/errata/RHSA-2019:0085
• http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00014.html
• https://github.com/pyca/pyopenssl/commit/e73818600065821d588af475b024f4eb518c3509