PYSEC-2017-93

Dashboard / Vulnerabilities / PYSEC-2017-93

PYSEC-2017-93

Summary:

Details: 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.

References: https://python-hyper.org/priority/en/latest/security/CVE-2016-6580.html, http://www.securityfocus.com/bid/92311, https://github.com/advisories/GHSA-h3q4-6j7f-r24c