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CVE Database

CVE-2013-2099

Impact: Low
Public: 2013-05-15
Bugzilla: 963260: CVE-2013-2099 python: ssl.match_hostname() DoS via certificates with specially crafted hostname wildcard patterns

Details

The MITRE CVE dictionary describes this issue as:

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.

Find out more about CVE-2013-2099 from the MITRE CVE dictionary and NIST NVD.

Statement

Not vulnerable. This issue did not affect the versions of python as shipped with Red Hat Enterprise Linux 5 and 6 as the SSL module there did not implement the match_hostname() routine yet.

CVSS v2 metrics

NOTE: The following CVSS v2 metrics and score provided are preliminary and subject to review.

Base Score: 2.6
Base Metrics: AV:N/AC:H/Au:N/C:N/I:N/A:P
Access Vector: Network
Access Complexity: High
Authentication: None
Confidentiality Impact: None
Integrity Impact: None
Availability Impact: Partial

Find out more about Red Hat support for the Common Vulnerability Scoring System (CVSS).

Red Hat security errata

Platform Errata Release Date

External References

Acknowledgements

This issue was discovered by Florian Weimer of Red Hat Product Security Team

This page is generated automatically and has not been checked for errors or omissions.

For clarification or corrections please contact the Red Hat Security Response Team.