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CVE-2013-2099

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Date: October 9, 2013

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.

Language: Python

Severity Score

Related Resources (15)

https://nvd.nist.gov/vuln/detail/CVE-2013-2099
https://access.redhat.com/errata/RHSA-2016:1166
http://www.openwall.com/lists/oss-security/2013/05/16/6
http://www.ubuntu.com/usn/USN-1983-1
http://secunia.com/advisories/55107
http://rhn.redhat.com/errata/RHSA-2014-1690.html
http://bugs.python.org/issue17980
https://security-tracker.debian.org/tracker/CVE-2013-2099
https://access.redhat.com/security/cve/CVE-2013-2099
https://bugzilla.redhat.com/show_bug.cgi?id=963260
http://secunia.com/advisories/55116
http://www.ubuntu.com/usn/USN-1984-1
https://people.canonical.com/~ubuntu-security/cve/CVE-2013-2099
http://www.ubuntu.com/usn/USN-1985-1
https://www.mend.io/vulnerability-database/CVE-2013-2099

Severity Score

Weakness Type (CWE)

Resource Management Errors

CWE-399

Top Fix

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CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): HIGH
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): LOW

CVSS v2

Base Score:
Access Vector (AV): NETWORK
Access Complexity (AC): MEDIUM
Authentication (AU): NONE
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): PARTIAL
Additional information:

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