CVE-2013-2099

MEDIUM

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.

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

Details

Source: MITRE

Published: 2013-10-09

Updated: 2016-06-09

Type: CWE-399

Risk Information

CVSS v2.0

Base Score: 4.3

Vector: AV:N/AC:M/Au:N/C:N/I:N/A:P

Impact Score: 2.9

Exploitability Score: 8.6

Severity: MEDIUM