Synopsis

Important: gnutls security update

Type/Severity

Security Advisory: Important

Topic

Updated gnutls packages that fix one security issue are now available for

Red Hat Enterprise Linux 6.



The Red Hat Security Response Team has rated this update as having

Important 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.



Description

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.



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



Affected Products

Red Hat Enterprise Linux Server 6 x86_64

Red Hat Enterprise Linux Server 6 i386

Red Hat Enterprise Linux for x86_64 - Extended Update Support 6.5 x86_64

Red Hat Enterprise Linux for x86_64 - Extended Update Support 6.5 i386

Red Hat Enterprise Linux Workstation 6 x86_64

Red Hat Enterprise Linux Workstation 6 i386

Red Hat Enterprise Linux Desktop 6 x86_64

Red Hat Enterprise Linux Desktop 6 i386

Red Hat Enterprise Linux for IBM z Systems 6 s390x

Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 6.5 s390x

Red Hat Enterprise Linux for Power, big endian 6 ppc64

Red Hat Enterprise Linux for Power, big endian - Extended Update Support 6.5 ppc64

Red Hat Enterprise Linux for Scientific Computing 6 x86_64

Red Hat Enterprise Linux Server from RHUI 6 x86_64

Red Hat Enterprise Linux Server from RHUI 6 i386

Red Hat Enterprise Linux Server - Extended Update Support from RHUI 6.5 x86_64

Red Hat Enterprise Linux Server - Extended Update Support from RHUI 6.5 i386

Red Hat Enterprise Linux EUS Compute Node 6.5 x86_64

Red Hat Enterprise Linux Server - AUS 6.5 x86_64

Red Hat Enterprise Linux Server - TUS 6.5 x86_64

Fixes

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

CVEs

References