Vulnerability 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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Python | Python | 3.2.0 |
| Canonical | Ubuntu Linux | 12.04 |
Related Weaknesses (CWE)
References
- http://bugs.python.org/issue17980Patch
- http://rhn.redhat.com/errata/RHSA-2014-1690.html
- http://secunia.com/advisories/55107Vendor Advisory
- http://secunia.com/advisories/55116Vendor Advisory
- 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
- http://bugs.python.org/issue17980Patch
- http://rhn.redhat.com/errata/RHSA-2014-1690.html
- http://secunia.com/advisories/55107Vendor Advisory
- http://secunia.com/advisories/55116Vendor Advisory
- http://www.openwall.com/lists/oss-security/2013/05/16/6
FAQ
What is CVE-2013-2099?
CVE-2013-2099 is a vulnerability with a CVSS score of 4.3 (MEDIUM). 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 ve...
How severe is CVE-2013-2099?
CVE-2013-2099 has been rated MEDIUM with a CVSS base score of 4.3/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2013-2099?
Check the references section above for vendor advisories and patch information. Affected products include: Python Python, Canonical Ubuntu Linux.