Vulnerability Details CVE-2016-6580
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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.005
EPSS Ranking 64.1%
CVSS Severity
CVSS v3 Score 7.5
CVSS v2 Score 5.0
References
Products affected by CVE-2016-6580
-
cpe:2.3:a:python:python_priority_library:1.0.0
-
cpe:2.3:a:python:python_priority_library:1.1.0
-
cpe:2.3:a:python:python_priority_library:1.1.1