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Red Hat Security Advisory 2012-0429-01

Red Hat Security Advisory 2012-0429-01
Posted Mar 28, 2012
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2012-0429-01 - The GnuTLS library provides support for cryptographic algorithms and for protocols such as Transport Layer Security. A flaw was found in the way GnuTLS decrypted malformed TLS records. This could cause a TLS/SSL client or server to crash when processing a specially-crafted TLS record from a remote TLS/SSL connection peer. A boundary error was found in the gnutls_session_get_data() function. A malicious TLS/SSL server could use this flaw to crash a TLS/SSL client or, possibly, execute arbitrary code as the client, if the client passed a fixed-sized buffer to gnutls_session_get_data() before checking the real size of the session data provided by the server.

tags | advisory, remote, arbitrary, protocol
systems | linux, redhat
advisories | CVE-2011-4128, CVE-2012-1573
MD5 | 54b74ddd5981eec1a2ef266668b9f83f

Red Hat Security Advisory 2012-0429-01

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

Synopsis: Important: gnutls security update
Advisory ID: RHSA-2012:0429-01
Product: Red Hat Enterprise Linux
Advisory URL: https://rhn.redhat.com/errata/RHSA-2012-0429.html
Issue date: 2012-03-27
CVE Names: CVE-2011-4128 CVE-2012-1573
=====================================================================

1. Summary:

Updated gnutls packages that fix two security issues are now available for
Red Hat Enterprise Linux 6.

The Red Hat Security Response Team has rated this update as having
important security impact. Common Vulnerability Scoring System (CVSS) base
scores, which give detailed severity ratings, are available for each
vulnerability from the CVE links in the References section.

2. 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

3. Description:

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 decrypted malformed TLS records. This
could cause a TLS/SSL client or server to crash when processing a
specially-crafted TLS record from a remote TLS/SSL connection peer.
(CVE-2012-1573)

A boundary error was found in the gnutls_session_get_data() function. A
malicious TLS/SSL server could use this flaw to crash a TLS/SSL client or,
possibly, execute arbitrary code as the client, if the client passed a
fixed-sized buffer to gnutls_session_get_data() before checking the real
size of the session data provided by the server. (CVE-2011-4128)

Red Hat would like to thank Matthew Hall of Mu Dynamics for reporting
CVE-2012-1573.

Users of GnuTLS are advised to upgrade to these updated packages, which
contain backported patches to correct these issues. For the update to take
effect, all applications linked to the GnuTLS library must be restarted, or
the system rebooted.

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/):

752308 - CVE-2011-4128 gnutls: buffer overflow in gnutls_session_get_data() (GNUTLS-SA-2011-2)
805432 - CVE-2012-1573 gnutls: TLS record handling issue (GNUTLS-SA-2012-2, MU-201202-01)

6. Package List:

Red Hat Enterprise Linux Desktop (v. 6):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Client/en/os/SRPMS/gnutls-2.8.5-4.el6_2.2.src.rpm

i386:
gnutls-2.8.5-4.el6_2.2.i686.rpm
gnutls-debuginfo-2.8.5-4.el6_2.2.i686.rpm
gnutls-utils-2.8.5-4.el6_2.2.i686.rpm

x86_64:
gnutls-2.8.5-4.el6_2.2.i686.rpm
gnutls-2.8.5-4.el6_2.2.x86_64.rpm
gnutls-debuginfo-2.8.5-4.el6_2.2.i686.rpm
gnutls-debuginfo-2.8.5-4.el6_2.2.x86_64.rpm
gnutls-utils-2.8.5-4.el6_2.2.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-2.8.5-4.el6_2.2.src.rpm

i386:
gnutls-debuginfo-2.8.5-4.el6_2.2.i686.rpm
gnutls-devel-2.8.5-4.el6_2.2.i686.rpm
gnutls-guile-2.8.5-4.el6_2.2.i686.rpm

x86_64:
gnutls-debuginfo-2.8.5-4.el6_2.2.i686.rpm
gnutls-debuginfo-2.8.5-4.el6_2.2.x86_64.rpm
gnutls-devel-2.8.5-4.el6_2.2.i686.rpm
gnutls-devel-2.8.5-4.el6_2.2.x86_64.rpm
gnutls-guile-2.8.5-4.el6_2.2.i686.rpm
gnutls-guile-2.8.5-4.el6_2.2.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-2.8.5-4.el6_2.2.src.rpm

x86_64:
gnutls-2.8.5-4.el6_2.2.i686.rpm
gnutls-2.8.5-4.el6_2.2.x86_64.rpm
gnutls-debuginfo-2.8.5-4.el6_2.2.i686.rpm
gnutls-debuginfo-2.8.5-4.el6_2.2.x86_64.rpm
gnutls-utils-2.8.5-4.el6_2.2.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-2.8.5-4.el6_2.2.src.rpm

x86_64:
gnutls-debuginfo-2.8.5-4.el6_2.2.i686.rpm
gnutls-debuginfo-2.8.5-4.el6_2.2.x86_64.rpm
gnutls-devel-2.8.5-4.el6_2.2.i686.rpm
gnutls-devel-2.8.5-4.el6_2.2.x86_64.rpm
gnutls-guile-2.8.5-4.el6_2.2.i686.rpm
gnutls-guile-2.8.5-4.el6_2.2.x86_64.rpm

Red Hat Enterprise Linux Server (v. 6):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Server/en/os/SRPMS/gnutls-2.8.5-4.el6_2.2.src.rpm

i386:
gnutls-2.8.5-4.el6_2.2.i686.rpm
gnutls-debuginfo-2.8.5-4.el6_2.2.i686.rpm
gnutls-devel-2.8.5-4.el6_2.2.i686.rpm
gnutls-utils-2.8.5-4.el6_2.2.i686.rpm

ppc64:
gnutls-2.8.5-4.el6_2.2.ppc.rpm
gnutls-2.8.5-4.el6_2.2.ppc64.rpm
gnutls-debuginfo-2.8.5-4.el6_2.2.ppc.rpm
gnutls-debuginfo-2.8.5-4.el6_2.2.ppc64.rpm
gnutls-devel-2.8.5-4.el6_2.2.ppc.rpm
gnutls-devel-2.8.5-4.el6_2.2.ppc64.rpm
gnutls-utils-2.8.5-4.el6_2.2.ppc64.rpm

s390x:
gnutls-2.8.5-4.el6_2.2.s390.rpm
gnutls-2.8.5-4.el6_2.2.s390x.rpm
gnutls-debuginfo-2.8.5-4.el6_2.2.s390.rpm
gnutls-debuginfo-2.8.5-4.el6_2.2.s390x.rpm
gnutls-devel-2.8.5-4.el6_2.2.s390.rpm
gnutls-devel-2.8.5-4.el6_2.2.s390x.rpm
gnutls-utils-2.8.5-4.el6_2.2.s390x.rpm

x86_64:
gnutls-2.8.5-4.el6_2.2.i686.rpm
gnutls-2.8.5-4.el6_2.2.x86_64.rpm
gnutls-debuginfo-2.8.5-4.el6_2.2.i686.rpm
gnutls-debuginfo-2.8.5-4.el6_2.2.x86_64.rpm
gnutls-devel-2.8.5-4.el6_2.2.i686.rpm
gnutls-devel-2.8.5-4.el6_2.2.x86_64.rpm
gnutls-utils-2.8.5-4.el6_2.2.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-2.8.5-4.el6_2.2.src.rpm

i386:
gnutls-debuginfo-2.8.5-4.el6_2.2.i686.rpm
gnutls-guile-2.8.5-4.el6_2.2.i686.rpm

ppc64:
gnutls-debuginfo-2.8.5-4.el6_2.2.ppc.rpm
gnutls-debuginfo-2.8.5-4.el6_2.2.ppc64.rpm
gnutls-guile-2.8.5-4.el6_2.2.ppc.rpm
gnutls-guile-2.8.5-4.el6_2.2.ppc64.rpm

s390x:
gnutls-debuginfo-2.8.5-4.el6_2.2.s390.rpm
gnutls-debuginfo-2.8.5-4.el6_2.2.s390x.rpm
gnutls-guile-2.8.5-4.el6_2.2.s390.rpm
gnutls-guile-2.8.5-4.el6_2.2.s390x.rpm

x86_64:
gnutls-debuginfo-2.8.5-4.el6_2.2.i686.rpm
gnutls-debuginfo-2.8.5-4.el6_2.2.x86_64.rpm
gnutls-guile-2.8.5-4.el6_2.2.i686.rpm
gnutls-guile-2.8.5-4.el6_2.2.x86_64.rpm

Red Hat Enterprise Linux Workstation (v. 6):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Workstation/en/os/SRPMS/gnutls-2.8.5-4.el6_2.2.src.rpm

i386:
gnutls-2.8.5-4.el6_2.2.i686.rpm
gnutls-debuginfo-2.8.5-4.el6_2.2.i686.rpm
gnutls-devel-2.8.5-4.el6_2.2.i686.rpm
gnutls-utils-2.8.5-4.el6_2.2.i686.rpm

x86_64:
gnutls-2.8.5-4.el6_2.2.i686.rpm
gnutls-2.8.5-4.el6_2.2.x86_64.rpm
gnutls-debuginfo-2.8.5-4.el6_2.2.i686.rpm
gnutls-debuginfo-2.8.5-4.el6_2.2.x86_64.rpm
gnutls-devel-2.8.5-4.el6_2.2.i686.rpm
gnutls-devel-2.8.5-4.el6_2.2.x86_64.rpm
gnutls-utils-2.8.5-4.el6_2.2.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-2.8.5-4.el6_2.2.src.rpm

i386:
gnutls-debuginfo-2.8.5-4.el6_2.2.i686.rpm
gnutls-guile-2.8.5-4.el6_2.2.i686.rpm

x86_64:
gnutls-debuginfo-2.8.5-4.el6_2.2.i686.rpm
gnutls-debuginfo-2.8.5-4.el6_2.2.x86_64.rpm
gnutls-guile-2.8.5-4.el6_2.2.i686.rpm
gnutls-guile-2.8.5-4.el6_2.2.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-2011-4128.html
https://www.redhat.com/security/data/cve/CVE-2012-1573.html
https://access.redhat.com/security/updates/classification/#important

8. Contact:

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

Copyright 2012 Red Hat, Inc.
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