CVE-2013-2099
Description
Algorithmic complexity vulnerability in the ssl.match_hostname function in Python 3.2.x, 3.3.x, and earlier, and unspecified versions of python-backports-ssl_match_hostname as used for older Python versions, allows remote attackers to cause a denial of service (CPU consumption) via multiple wildcard characters in the common name in a certificate.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
OS impact
Ubuntu Affected 3 releases
| Version | Status | Fixed in |
|---|---|---|
| 13.04 | Affected | — |
| 12.10 | Affected | — |
| 12.04 | Affected | — |
Debian Fixed 5 releases
| Version | Status | Fixed in |
|---|---|---|
| trixie | Fixed | 2.6.0~bzr6574-1 |
| sid | Fixed | 8.5-1 |
| forky | Fixed | 8.5-1 |
| bullseye | Fixed | 2.6.0~bzr6574-1 |
| bookworm | Fixed | 2.6.0~bzr6574-1 |
References
- http://bugs.python.org/issue17980
- http://rhn.redhat.com/errata/RHSA-2014-1690.html
- http://secunia.com/advisories/55107
- http://secunia.com/advisories/55116
- http://www.openwall.com/lists/oss-security/2013/05/16/6
- http://www.ubuntu.com/usn/USN-1983-1
- http://www.ubuntu.com/usn/USN-1984-1
- http://www.ubuntu.com/usn/USN-1985-1
- https://access.redhat.com/errata/RHSA-2016:1166
- https://bugzilla.redhat.com/show_bug.cgi?id=963260
- https://security-tracker.debian.org/tracker/CVE-2013-2099
CWEs
CWE-399
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.