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CVE-2013-2099

4.3 · MEDIUM

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…

Published Oct 9, 2013pythonCWE-399EPSS 4.86%

Overview

CVE-2013-2099 is a medium-severity vulnerability affecting python python. It was published on October 9, 2013 and has a CVSS 2.0 base score of 4.3 (MEDIUM).

This vulnerability has a CVSS 2.0 base score of 4.3, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories and patches from python. Update python to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

Affected products

VendorProductVersionsStatus

References

Refbugs.python.org/issue17980Refrhn.redhat.com/errata/RHSA-2014-1690.htmlRefsecunia.com/advisories/55107Refsecunia.com/advisories/55116Refwww.openwall.com/lists/oss-security/2013/05/16/6Refwww.ubuntu.com/usn/USN-1983-1Refwww.ubuntu.com/usn/USN-1984-1Refwww.ubuntu.com/usn/USN-1985-1Refaccess.redhat.com/errata/RHSA-2016:1166Refbugzilla.redhat.com/show_bug.cgi?id=963260

How CyberStrike helps

Frequently asked questions

What is CVE-2013-2099?

CVE-2013-2099 is a medium-severity vulnerability affecting python python. It was published on October 9, 2013 and has a CVSS 2.0 base score of 4.3 (MEDIUM).

How severe is CVE-2013-2099?

This vulnerability has a CVSS 2.0 base score of 4.3, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2013-2099?

Check the references section for vendor advisories and patches from python. Update python to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2013-2099?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2013-2099 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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