Scientific Linux: 2012-03-27 Important: GnuTLS Security Flaws

Date: Wed, 28 Mar 2012 11:37:18 -0500
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Sender: Security Errata for Scientific Linux
 
From: Patrick Riehecky 
Subject: Security ERRATA Important: gnutls on SL5.x i386/x86_64
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Synopsis: Important: gnutls security update
Issue Date: 2012-03-27
CVE Numbers: CVE-2011-4128
 CVE-2012-1569
 CVE-2012-1573

The GnuTLS library provides support for cryptographic algorithms and for
protocols such as Transport Layer Security (TLS). GnuTLS includes libtasn1,
a library developed for ASN.1 (Abstract Syntax Notation One) structures
management that includes DER (Distinguished Encoding Rules) encoding and
decoding.

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 flaw was found in the way libtasn1 decoded DER data. An attacker could
create a carefully-crafted X.509 certificate that, when parsed by an
application that uses GnuTLS, could cause the application to crash.
(CVE-2012-1569)

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)

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.

SL5:
 i386
 gnutls-1.4.1-7.el5_8.2.i386.rpm
 gnutls-debuginfo-1.4.1-7.el5_8.2.i386.rpm
 gnutls-devel-1.4.1-7.el5_8.2.i386.rpm
 gnutls-utils-1.4.1-7.el5_8.2.i386.rpm
 x86_64
 gnutls-1.4.1-7.el5_8.2.i386.rpm
 gnutls-1.4.1-7.el5_8.2.x86_64.rpm
 gnutls-debuginfo-1.4.1-7.el5_8.2.i386.rpm
 gnutls-debuginfo-1.4.1-7.el5_8.2.x86_64.rpm
 gnutls-devel-1.4.1-7.el5_8.2.i386.rpm
 gnutls-devel-1.4.1-7.el5_8.2.x86_64.rpm
 gnutls-utils-1.4.1-7.el5_8.2.x86_64.rpm

- Scientific Linux Development Team
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