Vulnerability Details 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 versions, allows remote attackers to cause a denial of service (CPU consumption) via multiple wildcard characters in the common name in a certificate.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.035
EPSS Ranking 87.1%
CVSS Severity
CVSS v2 Score 4.3
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
- 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
Products affected by CVE-2013-2099
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cpe:2.3:a:python:python:3.2.0
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cpe:2.3:a:python:python:3.2.1
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cpe:2.3:a:python:python:3.2.2
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cpe:2.3:a:python:python:3.2.3
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cpe:2.3:a:python:python:3.2.4
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cpe:2.3:a:python:python:3.2.5
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cpe:2.3:a:python:python:3.3.0
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cpe:2.3:a:python:python:3.3.1
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cpe:2.3:a:python:python:3.3.2
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cpe:2.3:o:canonical:ubuntu_linux:12.04
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cpe:2.3:o:canonical:ubuntu_linux:12.10
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cpe:2.3:o:canonical:ubuntu_linux:13.04