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Urgent Update: GnuTLS Certificate Vulnerability in RHEL 6 RHSA-2014:0246-01

red hat
Calendar Grey March 3, 2014
Dist Redhat Esm H88
The advisory from Red Hat outlines an important patch for gnutls that resolves vulnerabilities related to the verification of X.509 certificates.
Updated gnutls packages that fix one security issue are now available for Red Hat Enterprise Linux 6

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/site/articles/11258

Summary

The GnuTLS library provides support for cryptographic algorithms and for protocols such as Transport Layer Security (TLS).
It was discovered that GnuTLS did not correctly handle certain errors that could occur during the verification of an X.509 certificate, causing it to incorrectly report a successful verification. An attacker could use this flaw to create a specially crafted certificate that could be accepted by GnuTLS as valid for a site chosen by the attacker. (CVE-2014-0092)
The CVE-2014-0092 issue was discovered by Nikos Mavrogiannopoulos of the Red Hat Security Technologies Team.
Users of GnuTLS are advised to upgrade to these updated packages, which correct this issue. For the update to take effect, all applications linked to the GnuTLS library must be restarted.

Topics%20covered

Topics Covered

security advisory Red Hat Enterprise Linux security impact gnutls important update certificate error cryptographic algorithms

References

https://access.redhat.com/security/cve/CVE-2014-0092 https://access.redhat.com/security/updates/classification/#important

Package List

Red Hat Enterprise Linux Desktop (v. 6):
Source:
i386: gnutls-2.8.5-13.el6_5.i686.rpm gnutls-debuginfo-2.8.5-13.el6_5.i686.rpm gnutls-utils-2.8.5-13.el6_5.i686.rpm
x86_64: gnutls-2.8.5-13.el6_5.i686.rpm gnutls-2.8.5-13.el6_5.x86_64.rpm gnutls-debuginfo-2.8.5-13.el6_5.i686.rpm gnutls-debuginfo-2.8.5-13.el6_5.x86_64.rpm gnutls-utils-2.8.5-13.el6_5.x86_64.rpm
Red Hat Enterprise Linux Desktop Optional (v. 6):
Source:
i386: gnutls-debuginfo-2.8.5-13.el6_5.i686.rpm gnutls-devel-2.8.5-13.el6_5.i686.rpm gnutls-guile-2.8.5-13.el6_5.i686.rpm
x86_64: gnutls-debuginfo-2.8.5-13.el6_5.i686.rpm gnutls-debuginfo-2.8.5-13.el6_5.x86_64.rpm gnutls-devel-2.8.5-13.el6_5.i686.rpm gnutls-devel-2.8.5-13.el6_5.x86_64.rpm gnutls-guile-2.8.5-13.el6_5.i686.rpm gnutls-guile-2.8.5-13.el6_5.x86_64.rpm
Red Hat Enterprise Linux HPC Node (v. 6):
Source:
x86_64: gnutls-2.8.5-13.el6_5.i686.rpm gnutls-2.8.5-13.el6_5.x86_64.rpm gnutls-debuginfo-2.8.5-13.el6_5.i686.rpm gnutls-debuginfo-2.8.5-13.el6_5.x86_64.rpm gnutls-utils-2.8.5-13.el6_5.x86_64.rpm
Red Hat Enterprise Linux HPC Node Optional (v. 6):
Source:
x86_64: gnutls-debuginfo-2.8.5-13.el6_5.i686.rpm gnutls-debuginfo-2.8.5-13.el6_5.x86_64.rpm gnutls-devel-2.8.5-13.el6_5.i686.rpm gnutls-devel-2.8.5-13.el6_5.x86_64.rpm gnutls-guile-2.8.5-13.el6_5.i686.rpm

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2014:0246-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2014:0246.html
Issue date: 2014-03-03

Topic

Updated gnutls packages that fix one security issue are now available forRed Hat Enterprise Linux 6.The Red Hat Security Response Team has rated this update as havingImportant security impact. A Common Vulnerability Scoring System (CVSS)base score, which gives a detailed severity rating, is available from theCVE link in the References section.

Topics%20covered

Topics Covered

security advisory Red Hat Enterprise Linux security impact gnutls important update certificate error cryptographic algorithms

Relevant Releases Architectures

Red Hat Enterprise Linux Desktop (v. 6) - i386, x86_64

Red Hat Enterprise Linux Desktop Optional (v. 6) - i386, x86_64

Red Hat Enterprise Linux HPC Node (v. 6) - x86_64

Red Hat Enterprise Linux HPC Node Optional (v. 6) - x86_64

Red Hat Enterprise Linux Server (v. 6) - i386, ppc64, s390x, x86_64

Red Hat Enterprise Linux Server Optional (v. 6) - i386, ppc64, s390x, x86_64

Red Hat Enterprise Linux Workstation (v. 6) - i386, x86_64

Red Hat Enterprise Linux Workstation Optional (v. 6) - i386, x86_64

Bugs Fixed

1069865 - CVE-2014-0092 gnutls: incorrect error handling in certificate verification (GNUTLS-SA-2014-2)

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