CVE-2013-2099
MEDIUM severity · CVSS 4.3 · CWE-399
4.3CVSS MEDIUM
Summary
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.
Impact & exploitability
Attack vectorNetwork
Attack complexity—
Privileges required—
User interaction—
Confidentiality impactNone
Integrity impactNone
Availability impact—
Exploit probability (EPSS)5%
AV:N/AC:M/Au:N/C:N/I:N/A:P
Recommendation
Apply the vendor fix in your normal patch cycle. Open any affected product above for its exact safe version.
Official patch: http://bugs.python.org/issue17980 ↗
Additional information
- NVD record
- http://bugs.python.org/issue17980Patch
- http://secunia.com/advisories/55107Advisory
- http://secunia.com/advisories/55116Advisory
- http://rhn.redhat.com/errata/RHSA-2014-1690.html
- 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