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Category:   Application (VPN)  >   GnuTLS Vendors:   gnutls.org
(Red Hat Issues Fix) GnuTLS TLS Record Decoding Flaw Lets Remote Users Deny Service
SecurityTracker Alert ID:  1028604
SecurityTracker URL:  http://securitytracker.com/id/1028604
CVE Reference:   CVE-2013-2116   (Links to External Site)
Date:  May 30 2013
Impact:   Denial of service via network
Fix Available:  Yes  Vendor Confirmed:  Yes  Exploit Included:  Yes  
Version(s): 2.12.23
Description:   A vulnerability was reported in GnuTLS. A remote user can cause denial of service conditions.

A remote user can send specially crafted data to cause the target service to crash.

The vulnerability resides in 'lib/gnutls_cipher.c'.

[Editor's note: This vulnerability was introduced in the fix for GNUTLS-SA-2013-2 (CVE-2013-1619).]

Impact:   A remote user can cause the target service to crash.
Solution:   Red Hat has issued a fix.

The Red Hat advisory is available at:

https://rhn.redhat.com/errata/RHSA-2013-0883.html

Vendor URL:  www.gnu.org/software/libc/ (Links to External Site)
Cause:   State error
Underlying OS:  Linux (Red Hat Enterprise)
Underlying OS Comments:  5, 6

Message History:   This archive entry is a follow-up to the message listed below.
May 30 2013 GnuTLS TLS Record Decoding Flaw Lets Remote Users Deny Service



 Source Message Contents

Subject:  [RHSA-2013:0883-01] Important: gnutls security update

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

=====================================================================
                   Red Hat Security Advisory

Synopsis:          Important: gnutls security update
Advisory ID:       RHSA-2013:0883-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://rhn.redhat.com/errata/RHSA-2013-0883.html
Issue date:        2013-05-30
CVE Names:         CVE-2013-2116 
=====================================================================

1. Summary:

Updated gnutls packages that fix one security issue are now available for
Red Hat Enterprise Linux 5 and 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.

2. Relevant releases/architectures:

RHEL Desktop Workstation (v. 5 client) - i386, x86_64
Red Hat Enterprise Linux (v. 5 server) - i386, ia64, ppc, s390x, x86_64
Red Hat Enterprise Linux Desktop (v. 5 client) - i386, x86_64
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

3. Description:

The GnuTLS library provides support for cryptographic algorithms and for
protocols such as Transport Layer Security (TLS).

It was discovered that the fix for the CVE-2013-1619 issue released via
RHSA-2013:0588 introduced a regression in the way GnuTLS decrypted TLS/SSL
encrypted records when CBC-mode cipher suites were used. A remote attacker
could possibly use this flaw to crash a server or client application that
uses GnuTLS. (CVE-2013-2116)

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.

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
https://access.redhat.com/knowledge/articles/11258

5. Bugs fixed (http://bugzilla.redhat.com/):

966754 - CVE-2013-2116 gnutls: out of bounds read in _gnutls_ciphertext2compressed (GNUTLS-SA-2013-2)

6. Package List:

Red Hat Enterprise Linux Desktop (v. 5 client):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Client/en/os/SRPMS/gnutls-1.4.1-10.el5_9.2.src.rpm

i386:
gnutls-1.4.1-10.el5_9.2.i386.rpm
gnutls-debuginfo-1.4.1-10.el5_9.2.i386.rpm
gnutls-utils-1.4.1-10.el5_9.2.i386.rpm

x86_64:
gnutls-1.4.1-10.el5_9.2.i386.rpm
gnutls-1.4.1-10.el5_9.2.x86_64.rpm
gnutls-debuginfo-1.4.1-10.el5_9.2.i386.rpm
gnutls-debuginfo-1.4.1-10.el5_9.2.x86_64.rpm
gnutls-utils-1.4.1-10.el5_9.2.x86_64.rpm

RHEL Desktop Workstation (v. 5 client):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Client/en/os/SRPMS/gnutls-1.4.1-10.el5_9.2.src.rpm

i386:
gnutls-debuginfo-1.4.1-10.el5_9.2.i386.rpm
gnutls-devel-1.4.1-10.el5_9.2.i386.rpm

x86_64:
gnutls-debuginfo-1.4.1-10.el5_9.2.i386.rpm
gnutls-debuginfo-1.4.1-10.el5_9.2.x86_64.rpm
gnutls-devel-1.4.1-10.el5_9.2.i386.rpm
gnutls-devel-1.4.1-10.el5_9.2.x86_64.rpm

Red Hat Enterprise Linux (v. 5 server):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Server/en/os/SRPMS/gnutls-1.4.1-10.el5_9.2.src.rpm

i386:
gnutls-1.4.1-10.el5_9.2.i386.rpm
gnutls-debuginfo-1.4.1-10.el5_9.2.i386.rpm
gnutls-devel-1.4.1-10.el5_9.2.i386.rpm
gnutls-utils-1.4.1-10.el5_9.2.i386.rpm

ia64:
gnutls-1.4.1-10.el5_9.2.i386.rpm
gnutls-1.4.1-10.el5_9.2.ia64.rpm
gnutls-debuginfo-1.4.1-10.el5_9.2.i386.rpm
gnutls-debuginfo-1.4.1-10.el5_9.2.ia64.rpm
gnutls-devel-1.4.1-10.el5_9.2.ia64.rpm
gnutls-utils-1.4.1-10.el5_9.2.ia64.rpm

ppc:
gnutls-1.4.1-10.el5_9.2.ppc.rpm
gnutls-1.4.1-10.el5_9.2.ppc64.rpm
gnutls-debuginfo-1.4.1-10.el5_9.2.ppc.rpm
gnutls-debuginfo-1.4.1-10.el5_9.2.ppc64.rpm
gnutls-devel-1.4.1-10.el5_9.2.ppc.rpm
gnutls-devel-1.4.1-10.el5_9.2.ppc64.rpm
gnutls-utils-1.4.1-10.el5_9.2.ppc.rpm

s390x:
gnutls-1.4.1-10.el5_9.2.s390.rpm
gnutls-1.4.1-10.el5_9.2.s390x.rpm
gnutls-debuginfo-1.4.1-10.el5_9.2.s390.rpm
gnutls-debuginfo-1.4.1-10.el5_9.2.s390x.rpm
gnutls-devel-1.4.1-10.el5_9.2.s390.rpm
gnutls-devel-1.4.1-10.el5_9.2.s390x.rpm
gnutls-utils-1.4.1-10.el5_9.2.s390x.rpm

x86_64:
gnutls-1.4.1-10.el5_9.2.i386.rpm
gnutls-1.4.1-10.el5_9.2.x86_64.rpm
gnutls-debuginfo-1.4.1-10.el5_9.2.i386.rpm
gnutls-debuginfo-1.4.1-10.el5_9.2.x86_64.rpm
gnutls-devel-1.4.1-10.el5_9.2.i386.rpm
gnutls-devel-1.4.1-10.el5_9.2.x86_64.rpm
gnutls-utils-1.4.1-10.el5_9.2.x86_64.rpm

Red Hat Enterprise Linux Desktop (v. 6):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Client/en/os/SRPMS/gnutls-2.8.5-10.el6_4.2.src.rpm

i386:
gnutls-2.8.5-10.el6_4.2.i686.rpm
gnutls-debuginfo-2.8.5-10.el6_4.2.i686.rpm
gnutls-utils-2.8.5-10.el6_4.2.i686.rpm

x86_64:
gnutls-2.8.5-10.el6_4.2.i686.rpm
gnutls-2.8.5-10.el6_4.2.x86_64.rpm
gnutls-debuginfo-2.8.5-10.el6_4.2.i686.rpm
gnutls-debuginfo-2.8.5-10.el6_4.2.x86_64.rpm
gnutls-utils-2.8.5-10.el6_4.2.x86_64.rpm

Red Hat Enterprise Linux Desktop Optional (v. 6):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Client/en/os/SRPMS/gnutls-2.8.5-10.el6_4.2.src.rpm

i386:
gnutls-debuginfo-2.8.5-10.el6_4.2.i686.rpm
gnutls-devel-2.8.5-10.el6_4.2.i686.rpm
gnutls-guile-2.8.5-10.el6_4.2.i686.rpm

x86_64:
gnutls-debuginfo-2.8.5-10.el6_4.2.i686.rpm
gnutls-debuginfo-2.8.5-10.el6_4.2.x86_64.rpm
gnutls-devel-2.8.5-10.el6_4.2.i686.rpm
gnutls-devel-2.8.5-10.el6_4.2.x86_64.rpm
gnutls-guile-2.8.5-10.el6_4.2.i686.rpm
gnutls-guile-2.8.5-10.el6_4.2.x86_64.rpm

Red Hat Enterprise Linux HPC Node (v. 6):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6ComputeNode/en/os/SRPMS/gnutls-2.8.5-10.el6_4.2.src.rpm

x86_64:
gnutls-2.8.5-10.el6_4.2.i686.rpm
gnutls-2.8.5-10.el6_4.2.x86_64.rpm
gnutls-debuginfo-2.8.5-10.el6_4.2.i686.rpm
gnutls-debuginfo-2.8.5-10.el6_4.2.x86_64.rpm
gnutls-utils-2.8.5-10.el6_4.2.x86_64.rpm

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

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6ComputeNode/en/os/SRPMS/gnutls-2.8.5-10.el6_4.2.src.rpm

x86_64:
gnutls-debuginfo-2.8.5-10.el6_4.2.i686.rpm
gnutls-debuginfo-2.8.5-10.el6_4.2.x86_64.rpm
gnutls-devel-2.8.5-10.el6_4.2.i686.rpm
gnutls-devel-2.8.5-10.el6_4.2.x86_64.rpm
gnutls-guile-2.8.5-10.el6_4.2.i686.rpm
gnutls-guile-2.8.5-10.el6_4.2.x86_64.rpm

Red Hat Enterprise Linux Server (v. 6):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Server/en/os/SRPMS/gnutls-2.8.5-10.el6_4.2.src.rpm

i386:
gnutls-2.8.5-10.el6_4.2.i686.rpm
gnutls-debuginfo-2.8.5-10.el6_4.2.i686.rpm
gnutls-devel-2.8.5-10.el6_4.2.i686.rpm
gnutls-utils-2.8.5-10.el6_4.2.i686.rpm

ppc64:
gnutls-2.8.5-10.el6_4.2.ppc.rpm
gnutls-2.8.5-10.el6_4.2.ppc64.rpm
gnutls-debuginfo-2.8.5-10.el6_4.2.ppc.rpm
gnutls-debuginfo-2.8.5-10.el6_4.2.ppc64.rpm
gnutls-devel-2.8.5-10.el6_4.2.ppc.rpm
gnutls-devel-2.8.5-10.el6_4.2.ppc64.rpm
gnutls-utils-2.8.5-10.el6_4.2.ppc64.rpm

s390x:
gnutls-2.8.5-10.el6_4.2.s390.rpm
gnutls-2.8.5-10.el6_4.2.s390x.rpm
gnutls-debuginfo-2.8.5-10.el6_4.2.s390.rpm
gnutls-debuginfo-2.8.5-10.el6_4.2.s390x.rpm
gnutls-devel-2.8.5-10.el6_4.2.s390.rpm
gnutls-devel-2.8.5-10.el6_4.2.s390x.rpm
gnutls-utils-2.8.5-10.el6_4.2.s390x.rpm

x86_64:
gnutls-2.8.5-10.el6_4.2.i686.rpm
gnutls-2.8.5-10.el6_4.2.x86_64.rpm
gnutls-debuginfo-2.8.5-10.el6_4.2.i686.rpm
gnutls-debuginfo-2.8.5-10.el6_4.2.x86_64.rpm
gnutls-devel-2.8.5-10.el6_4.2.i686.rpm
gnutls-devel-2.8.5-10.el6_4.2.x86_64.rpm
gnutls-utils-2.8.5-10.el6_4.2.x86_64.rpm

Red Hat Enterprise Linux Server Optional (v. 6):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Server/en/os/SRPMS/gnutls-2.8.5-10.el6_4.2.src.rpm

i386:
gnutls-debuginfo-2.8.5-10.el6_4.2.i686.rpm
gnutls-guile-2.8.5-10.el6_4.2.i686.rpm

ppc64:
gnutls-debuginfo-2.8.5-10.el6_4.2.ppc.rpm
gnutls-debuginfo-2.8.5-10.el6_4.2.ppc64.rpm
gnutls-guile-2.8.5-10.el6_4.2.ppc.rpm
gnutls-guile-2.8.5-10.el6_4.2.ppc64.rpm

s390x:
gnutls-debuginfo-2.8.5-10.el6_4.2.s390.rpm
gnutls-debuginfo-2.8.5-10.el6_4.2.s390x.rpm
gnutls-guile-2.8.5-10.el6_4.2.s390.rpm
gnutls-guile-2.8.5-10.el6_4.2.s390x.rpm

x86_64:
gnutls-debuginfo-2.8.5-10.el6_4.2.i686.rpm
gnutls-debuginfo-2.8.5-10.el6_4.2.x86_64.rpm
gnutls-guile-2.8.5-10.el6_4.2.i686.rpm
gnutls-guile-2.8.5-10.el6_4.2.x86_64.rpm

Red Hat Enterprise Linux Workstation (v. 6):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Workstation/en/os/SRPMS/gnutls-2.8.5-10.el6_4.2.src.rpm

i386:
gnutls-2.8.5-10.el6_4.2.i686.rpm
gnutls-debuginfo-2.8.5-10.el6_4.2.i686.rpm
gnutls-devel-2.8.5-10.el6_4.2.i686.rpm
gnutls-utils-2.8.5-10.el6_4.2.i686.rpm

x86_64:
gnutls-2.8.5-10.el6_4.2.i686.rpm
gnutls-2.8.5-10.el6_4.2.x86_64.rpm
gnutls-debuginfo-2.8.5-10.el6_4.2.i686.rpm
gnutls-debuginfo-2.8.5-10.el6_4.2.x86_64.rpm
gnutls-devel-2.8.5-10.el6_4.2.i686.rpm
gnutls-devel-2.8.5-10.el6_4.2.x86_64.rpm
gnutls-utils-2.8.5-10.el6_4.2.x86_64.rpm

Red Hat Enterprise Linux Workstation Optional (v. 6):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Workstation/en/os/SRPMS/gnutls-2.8.5-10.el6_4.2.src.rpm

i386:
gnutls-debuginfo-2.8.5-10.el6_4.2.i686.rpm
gnutls-guile-2.8.5-10.el6_4.2.i686.rpm

x86_64:
gnutls-debuginfo-2.8.5-10.el6_4.2.i686.rpm
gnutls-debuginfo-2.8.5-10.el6_4.2.x86_64.rpm
gnutls-guile-2.8.5-10.el6_4.2.i686.rpm
gnutls-guile-2.8.5-10.el6_4.2.x86_64.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/#package

7. References:

https://www.redhat.com/security/data/cve/CVE-2013-2116.html
https://access.redhat.com/security/updates/classification/#important
https://rhn.redhat.com/errata/RHSA-2013-0588.html

8. Contact:

The Red Hat security contact is <secalert@redhat.com>.  More contact
details at https://access.redhat.com/security/team/contact/

Copyright 2013 Red Hat, Inc.
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