CVE-2016-6580
priority vulnerable to denial of service
Also known as GHSA-h3q4-6j7f-r24c, PYSEC-2017-93
Published 9 y ago · modified 4 mo ago · JSON
Summary
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 (EPSS)
1.81% probability of exploitation in the next 30 days, higher than 79% of all scored CVEs.
CVSS scores
| Assigned by | Version | Score | Vector |
|---|---|---|---|
| NVD | 3.0 | 7.5 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| NVD | 2.0 | 5.0 | AV:N/AC:L/Au:N/C:N/I:N/A:P |
| GitHub | 3.0 | 7.5 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| pypi | priority | <1.2.0 | 1.2.0 |
Classification
References
- securityfocus.com /bid/92311 · vdb-entry, x_refsource_BID, x_transferred
- python-hyper.org /priority/en/latest/security/CVE-2016-6580.html · x_refsource_CONFIRM, x_transferred
- nvd.nist.gov /vuln/detail/CVE-2016-6580 · advisory
- github.com /python-hyper/priority/commit/7d01a7dc4db83bce50f20d47caf4f37b403a3ecd · web
- github.com /pypa/advisory-database/tree/main/vulns/priority/PYSEC-2017-93.yaml · web
- github.com /python-hyper/priority · package
- web.archive.org /web/20160806004329/http://www.securityfocus.com/bid/92311 · web
- github.com /advisories/GHSA-h3q4-6j7f-r24c · advisory
Sources
- CVE List: CVE-2016-6580
- GitHub Advisory: GHSA-h3q4-6j7f-r24c
- NVD: CVE-2016-6580
- OSV: PYSEC-2017-93
vulnwire keeps one entry per vulnerability: the CVE id wins, then GHSA; records that alias each other are merged. Machine-readable: JSON.