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Red Hat Advises RHSA-2014:0684-01 on Critical gnutls DoS Vulnerability

red hat
Calendar Grey June 10, 2014
Dist Redhat Esm H88
Debian unveils significant openssl vulnerability patch tackling severe security issues. Update promptly to safeguard against potential breaches.
Updated gnutls packages that fix two security issues are now available for Red Hat Enterprise Linux 7

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).
A flaw was found in the way GnuTLS parsed session IDs from ServerHello messages of the TLS/SSL handshake. A malicious server could use this flaw to send an excessively long session ID value, which would trigger a buffer overflow in a connecting TLS/SSL client application using GnuTLS, causing the client application to crash or, possibly, execute arbitrary code. (CVE-2014-3466)
A NULL pointer dereference flaw was found in the way GnuTLS parsed X.509 certificates. A specially crafted certificate could cause a server or client application using GnuTLS to crash. (CVE-2014-3465)
Red Hat would like to thank GnuTLS upstream for reporting these issues. Upstream acknowledges Joonas Kuorilehto of Codenomicon as the original reporter of CVE-2014-3466.
Users of GnuTLS are advised to upgrade to these updated packages, which correct these issues. For the update to take effect, all applications linked to the GnuTLS library must be restarted.

Topics%20covered

Topics Covered

security advisory security update buffer overflow DoS Red Hat Enterprise Linux critical severity gnutls

References

https://access.redhat.com/security/cve/CVE-2014-3465 https://access.redhat.com/security/cve/CVE-2014-3466 https://access.redhat.com/security/updates/classification/#important

Package List

Red Hat Enterprise Linux Client (v. 7):
Source: gnutls-3.1.18-9.el7_0.src.rpm
x86_64: gnutls-3.1.18-9.el7_0.i686.rpm gnutls-3.1.18-9.el7_0.x86_64.rpm gnutls-dane-3.1.18-9.el7_0.i686.rpm gnutls-dane-3.1.18-9.el7_0.x86_64.rpm gnutls-debuginfo-3.1.18-9.el7_0.i686.rpm gnutls-debuginfo-3.1.18-9.el7_0.x86_64.rpm gnutls-utils-3.1.18-9.el7_0.x86_64.rpm
Red Hat Enterprise Linux Client Optional (v. 7):
x86_64: gnutls-c++-3.1.18-9.el7_0.i686.rpm gnutls-c++-3.1.18-9.el7_0.x86_64.rpm gnutls-debuginfo-3.1.18-9.el7_0.i686.rpm gnutls-debuginfo-3.1.18-9.el7_0.x86_64.rpm gnutls-devel-3.1.18-9.el7_0.i686.rpm gnutls-devel-3.1.18-9.el7_0.x86_64.rpm
Red Hat Enterprise Linux ComputeNode (v. 7):
Source: gnutls-3.1.18-9.el7_0.src.rpm
x86_64: gnutls-3.1.18-9.el7_0.i686.rpm gnutls-3.1.18-9.el7_0.x86_64.rpm gnutls-dane-3.1.18-9.el7_0.i686.rpm gnutls-dane-3.1.18-9.el7_0.x86_64.rpm gnutls-debuginfo-3.1.18-9.el7_0.i686.rpm gnutls-debuginfo-3.1.18-9.el7_0.x86_64.rpm gnutls-utils-3.1.18-9.el7_0.x86_64.rpm
Red Hat Enterprise Linux ComputeNode Optional (v. 7):
x86_64: gnutls-c++-3.1.18-9.el7_0.i686.rpm gnutls-c++-3.1.18-9.el7_0.x86_64.rpm gnutls-debuginfo-3.1.18-9.el7_0.i686.rpm gnutls-debuginfo-3.1.18-9.el7_0.x86_64.rpm gnutls-devel-3.1.18-9.el7_0.i686.rpm gnutls-devel-3.1.18-9.el7_0.x86_64.rpm


Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2014:0684-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2014:0684.html
Issue date: 2014-06-10

Topic

Updated gnutls packages that fix two security issues are now available forRed Hat Enterprise Linux 7.The Red Hat Security Response Team has rated this update as havingImportant security impact. Common Vulnerability Scoring System (CVSS) basescores, which give detailed severity ratings, are available for eachvulnerability from the CVE links in the References section.

Topics%20covered

Topics Covered

security advisory security update buffer overflow DoS Red Hat Enterprise Linux critical severity gnutls

Relevant Releases Architectures

Red Hat Enterprise Linux Client (v. 7) - x86_64

Red Hat Enterprise Linux Client Optional (v. 7) - x86_64

Red Hat Enterprise Linux ComputeNode (v. 7) - x86_64

Red Hat Enterprise Linux ComputeNode Optional (v. 7) - x86_64

Red Hat Enterprise Linux Server (v. 7) - ppc64, s390x, x86_64

Red Hat Enterprise Linux Workstation (v. 7) - x86_64

Bugs Fixed

1101734 - CVE-2014-3465 gnutls: gnutls_x509_dn_oid_name NULL pointer dereference

1101932 - CVE-2014-3466 gnutls: insufficient session id length check in _gnutls_read_server_hello (GNUTLS-SA-2014-3)

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