CVE-2013-2099

Name: CVE-2013-2099
Creator: NVD / NIST
Published: 2013-10-09T14:53:20.23+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 4.86%

Last modified Jun 16, 2026

CVE-2013-2099 is a vulnerability of currently unknown severity. 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.. EPSS estimates a 4.86% chance of exploitation in the next 30 days.

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.

Metrics

EPSS Probability

4.86%

90.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-399

Affected Software

Vendor	Product	Versions
Python	Python	3.2.0
Python	Python	3.2.1
Python	Python	3.2.2
Python	Python	3.2.3
Python	Python	3.2.4
Python	Python	3.2.5
Python	Python	3.3.0
Python	Python	3.3.1
Python	Python	3.3.2
Canonical	Ubuntu Linux	12.04
Canonical	Ubuntu Linux	12.10
Canonical	Ubuntu Linux	13.04

References

Timeline

Published: Oct 9, 2013
Last Modified: Jun 16, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2013-2099?

How severe is CVE-2013-2099?

Severity scoring for CVE-2013-2099 is pending analysis. The EPSS model estimates a 4.86% probability of exploitation in the next 30 days.

How do I fix CVE-2013-2099?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2013-2099?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST