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Ranjivost programskog paketa python-backports-ssl_match_hostname

  • Detalji os-a: LRH
  • Važnost: IMP
  • Operativni sustavi: L
  • Kategorije: LRH

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Red Hat Security Advisory

Synopsis: Low: python-backports-ssl_match_hostname security update
Advisory ID: RHSA-2014:1690-01
Product: Red Hat Enterprise Linux OpenStack Platform
Advisory URL:
Issue date: 2014-10-22
CVE Names: CVE-2013-2099

1. Summary:

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.

Red Hat Product Security has rated this update as having Low security
impact. A Common Vulnerability Scoring System (CVSS) base score, which
gives a detailed severity rating, is available from the CVE link in the
References section.

2. Relevant releases/architectures:

Red Hat Enterprise Linux OpenStack Platform 4.0 – noarch

3. Description:

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

4. 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

5. Bugs fixed (

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

6. Package List:

Red Hat Enterprise Linux OpenStack Platform 4.0:



These packages are GPG signed by Red Hat for security. Our key and
details on how to verify the signature are available from

7. References:

8. Contact:

The Red Hat security contact is <>. More contact
details at

Copyright 2014 Red Hat, Inc.
Version: GnuPG v1


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AutorTomislav Protega
Cert idNCERT-REF-2014-10-0005-ADV
ID izvornikaRHSA-2014:1690-01
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