onyx --cves cve-2021-3733
CVE-2021-3733
- score
- <0.1
- cvss
- 6.5
- epss
- 4.8%
- published
- 2022-03-10
- kev added
- —
- first seen
urllib's AbstractBasicAuthHandler contains a Regular Expression Denial of Service caused by a flaw in its authentication handling, letting an attacker controlling a malicious HTTP server trigger DoS via crafted payload, exploit requires attacker to control the server.
Timeline
How this CVE moved toward exploitation. Chart: last 30 days — trend score, EPSS, community mentions per day; hover the event lane.
- Published
- Tracked by Onyx
- Public PoC
Exploit availability
Public PoC flagged by vulnx; no direct exploit link among the citations.
Weaknesses
References 10
- https://bugs.python.org/issue43075
- https://bugzilla.redhat.com/show_bug.cgi?id=1995234
- https://github.com/python/cpython/commit/7215d1ae25525c92b026166f9d5cac85fb
- https://github.com/python/cpython/pull/24391
- https://security.netapp.com/advisory/ntap-20220407-0001/
- https://cert-portal.siemens.com/productcert/html/ssa-398330.html
- https://ubuntu.com/security/CVE-2021-3733
- https://lists.debian.org/debian-lts-announce/2023/05/msg00024.html
- https://lists.debian.org/debian-lts-announce/2023/06/msg00039.html
- https://lists.debian.org/debian-lts-announce/2024/12/msg00000.html