medium
4.3
CWE
399
Advisory Published
CVE Published
Updated

CVE-2013-2099

First published: Wed May 15 2013(Updated: )

A denial of service flaw was found in the way SSL module implementation of Python3, version 3 of the Python programming language (aka Python 3000), performed matching of the certificate's name in the case it contained many '*' wildcard characters. A remote attacker, able to obtain valid certificate with its name containing a lot of '*' wildcard characters could use this flaw to cause denial of service (excessive CPU consumption) by issuing request to validate such a certificate for / to an application using the Python's ssl.match_hostname() functionality. Upstream bug report: [1] <a href="http://bugs.python.org/issue17980">http://bugs.python.org/issue17980</a> CVE request: [2] <a href="http://www.openwall.com/lists/oss-security/2013/05/15/6">http://www.openwall.com/lists/oss-security/2013/05/15/6</a> (is for python-backports-ssl_match_hostname, but that code comes from Python 3.2 ssl module implementation) [3] <a href="http://www.openwall.com/lists/oss-security/2013/05/15/7">http://www.openwall.com/lists/oss-security/2013/05/15/7</a> Acknowledgements: Name: Florian Weimer (Red Hat Product Security)

Credit: secalert@redhat.com

Affected SoftwareAffected VersionHow to fix
IBM Cognos Analytics<=12.0.0-12.0.3
IBM Cognos Analytics<=11.2.0-11.2.4 FP4
Python Babel Localedata=3.2.0
Python Babel Localedata=3.2.1
Python Babel Localedata=3.2.2
Python Babel Localedata=3.2.3
Python Babel Localedata=3.2.4
Python Babel Localedata=3.2.5
Python Babel Localedata=3.3.0
Python Babel Localedata=3.3.1
Python Babel Localedata=3.3.2
Ubuntu Linux=12.04
Ubuntu Linux=12.10
Ubuntu Linux=13.04

Remedy

http://bugs.python.org/issue17980

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Reference Links

Parent vulnerabilities

(Appears in the following advisories)

Frequently Asked Questions

  • What is the severity of CVE-2013-2099?

    CVE-2013-2099 is classified as a denial-of-service vulnerability.

  • How do I fix CVE-2013-2099?

    To fix CVE-2013-2099, you should apply the relevant patches provided by your software vendor.

  • Which software is affected by CVE-2013-2099?

    CVE-2013-2099 affects specific versions of Python 3 and IBM Cognos Analytics.

  • What versions of Python are impacted by CVE-2013-2099?

    CVE-2013-2099 impacts Python versions 3.2.0 through 3.3.2.

  • Is AWS affected by CVE-2013-2099?

    CVE-2013-2099 does not specifically list AWS services as affected.

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