CVE-2013-2099

Severity

43%

Complexity

86%

Confidentiality

48%

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.

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 2.0 Base Score 4.3. CVSS Attack Vector: network. CVSS Attack Complexity: medium. CVSS Vector: (AV:N/AC:M/Au:N/C:N/I:N/A:P).

Overview

First reported 11 years ago

2013-10-09 14:53:00

Last updated 8 years ago

2016-06-09 01:59:00

Affected Software

Python 3.2.0

3.2.0

Python 3.2.1

3.2.1

Python 3.2.2

3.2.2

Python 3.2.3

3.2.3

Python 3.2.4

3.2.4

Python 3.2.5

3.2.5

Python 3.3.0

3.3.0

Python 3.3.1

3.3.1

Python 3.3.2

3.3.2

Canonical Ubuntu Linux 12.04 LTS (Long-Term Support)

12.04

Canonical Ubuntu Linux 12.10

12.10

Canonical Ubuntu Linux 13.04

13.04

References

http://bugs.python.org/issue17980

Patch

RHSA-2014:1690

55107

Vendor Advisory

55116

Vendor Advisory

[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 }

USN-1983-1

USN-1984-1

USN-1985-1

RHSA-2016:1166

https://bugzilla.redhat.com/show_bug.cgi?id=963260

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