Vulnerability in Python Priority Library
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.018 (77.8th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 78th percentile — 77.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.018 · newest: 0.018 · change: 0.000
Affected products
- Python Priority Library — versions 1.0.0, 1.1.0, 1.1.1
Weakness classification (CWE)
References
- www.securityfocus.com/bid/92311 (VDB Entry, Third Party Advisory, vdb-entry)
- python-hyper.org/priority/en/latest/security/CVE-2016-6580.html (Mitigation, Vendor Advisory)
Frequently asked questions
- What is CVE-2016-6580?
- CVE-2016-6580 is a high-severity vulnerability in Python Priority Library, classified under CWE-399. CVSS score: 7.5/10. Published 2017-01-10.
- How severe is CVE-2016-6580?
- High severity. CVSS v3 base score is 7.5 out of 10.