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Red Hat 4.0 RHSA-2014:1690-01 Low: Python-Backports-SSL DoS Issue

red hat
Calendar Grey October 22, 2014
Dist Redhat Esm H88
A new version of python-backports-ssl_match_hostname has been released for Red Hat, addressing a denial-of-service vulnerability with minimal security implications.
An updated python-backports-ssl_match_hostname package that fixes one security issue is now available for Red Hat Enterprise Linux OpenStack Platform 4.0

Solution

Before applying this update, make sure all previously released errata relevant to your system have been applied.

This update is available via the Red Hat Network. Details on how to use the Red Hat Network to apply this update are available at https://access.redhat.com/articles/11258

Summary

The python-backports-ssl_match_hostname package provides RFC 6125 compliant wildcard matching.
A denial of service flaw was found in the way Python's SSL module implementation performed matching of certain certificate names. A remote attacker able to obtain a valid certificate that contained multiple wildcard characters could use this flaw to issue a request to validate such a certificate, resulting in excessive consumption of CPU. (CVE-2013-2099)
This issue was discovered by Florian Weimer of Red Hat Product Security.
All python-backports-ssl_match_hostname users are advised to upgrade to this updated package, which contains a backported patch to correct this issue.

Topics%20covered

Topics Covered

security advisory security update Red Hat low impact DoS flaw python-backports SSL patch

References

https://access.redhat.com/security/cve/CVE-2013-2099 https://access.redhat.com/security/updates/classification#low

Package List

Red Hat Enterprise Linux OpenStack Platform 4.0:
Source: python-backports-ssl_match_hostname-3.4.0.2-1.el6.src.rpm
noarch: python-backports-ssl_match_hostname-3.4.0.2-1.el6.noarch.rpm
These packages are GPG signed by Red Hat for security. Our key and details on how to verify the signature are available from https://access.redhat.com/security/team/key


Severity
low
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Critical

Advisory ID: RHSA-2014:1690-01
Product: Red Hat Enterprise Linux OpenStack Platform
Advisory URL: https://access.redhat.com/errata/RHSA-2014:1690.html
Issue date: 2014-10-22

Topic

An updated python-backports-ssl_match_hostname package that fixes onesecurity issue is now available for Red Hat Enterprise Linux OpenStackPlatform 4.0.Red Hat Product Security has rated this update as having Low securityimpact. A Common Vulnerability Scoring System (CVSS) base score, whichgives a detailed severity rating, is available from the CVE link in theReferences section.

Topics%20covered

Topics Covered

security advisory security update Red Hat low impact DoS flaw python-backports SSL patch

Relevant Releases Architectures

Red Hat Enterprise Linux OpenStack Platform 4.0 - noarch

Bugs Fixed

963260 - CVE-2013-2099 python: ssl.match_hostname() DoS via certificates with specially crafted hostname wildcard patterns

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