CVE-2016-6580

Advisory

A HTTP/2 implementation built using any version of the Python priority library prior to version 1.2.0 could be targeted by a malicious peer by having that peer assign priority information for every possible HTTP/2 stream ID. The priority tree would happily continue to store the priority information for each stream, and would therefore allocate unbounded amounts of memory. Attempting to actually use a tree like this would also cause extremely high CPU usage to maintain the tree.

Affected package

Affected versions

Fixed versions

Vulnerability changelog

A HTTP/2 implementation built using any version of the Python priority library prior to version 1.2.0 could be targeted by a malicious peer by having that peer assign priority information for every possible HTTP/2 stream ID. The priority tree would happily continue to store the priority information for each stream, and would therefore allocate unbounded amounts of memory. Attempting to actually use a tree like this would also cause extremely high CPU usage to maintain the tree.


CONFIRM:https://python-hyper.org/priority/en/latest/security/CVE-2016-6580.html: https://python-hyper.org/priority/en/latest/security/CVE-2016-6580.html
BID:92311: http://www.securityfocus.com/bid/92311

Resources

• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-6580
• https://python-hyper.org/priority/en/latest/security/CVE-2016-6580.html
• http://www.securityfocus.com/bid/92311