CVE-2013-2099
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
02 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
03 Exploitation and scoring
- Exploitation
- Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
- SSVC decision
- Not assessed by CISA
- EPSS probability
- 4.85% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 91.7% of scored records. A rank, not a probability.
- NVD base score
- The NVD has published no score for this record
- NVD CVSS vector
- No NVD score to derive
- NVD analysis status
- Modified. NVD last modified this record on 2026-06-16.
- Red Hat severity
- Low. Red Hat's rating for its own products, not a CVSS rating.
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
04 Metadata
- Published
- 2013-10-09 14:44Z13 YR AGO
- Last updated
- 2024-08-06 15:27Z2 YR AGO
- Reserved
- 2013-02-19
- Assigning CNA
- redhat
- Record state
- PUBLISHED
- Severity
- Not rated by the issuing CNA
- CNA CVSS vector
- Not published by the issuing CNA
- Weaknesses
- Data version
- 5.1
- Document digest
- a589a6ca234bd0e9c049743a909597d5e374159b2ff9391de148abdf587ee180
05 Affected products
06 References
- bugzilla.redhat.comhttps://bugzilla.redhat.com/show_bug.cgi?id=963260
- www.ubuntu.comUSN-1984-1http://www.ubuntu.com/usn/USN-1984-1
- secunia.com55116http://secunia.com/advisories/55116
- access.redhat.comRHSA-2016:1166https://access.redhat.com/errata/RHSA-2016:1166
- www.ubuntu.comUSN-1985-1http://www.ubuntu.com/usn/USN-1985-1
- bugs.python.orghttp://bugs.python.org/issue17980
- secunia.com55107http://secunia.com/advisories/55107
- rhn.redhat.comRHSA-2014:1690http://rhn.redhat.com/errata/RHSA-2014-1690.html
- www.ubuntu.comUSN-1983-1http://www.ubuntu.com/usn/USN-1983-1
- www.openwall.com[oss-security] 20130515 Re: CVE Request (minor) -- Python 3.2: DoS when matching certificate with many '*' wildcard characters {was: CVE Request (minor) -- python-backports-ssl_match_hostname: Denial of service when matching certificate with many '*' wildcard characters }http://www.openwall.com/lists/oss-security/2013/05/16/6
07 Fixed in
Debian 12
- bzr Fixed in 2.6.0~bzr6574-1
- linkchecker Fixed in 8.5-1
- python-tornado Fixed in 2.4.1-3
- python-urllib3 Fixed in 1.6-2
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 13
- bzr Fixed in 2.6.0~bzr6574-1
- linkchecker Fixed in 8.5-1
- python-tornado Fixed in 2.4.1-3
- python-urllib3 Fixed in 1.6-2
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 14
- linkchecker Fixed in 8.5-1
- python-tornado Fixed in 2.4.1-3
- python-urllib3 Fixed in 1.6-2
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 16.04 LTS
- w3af No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.