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Test ID:
Category:Red Hat Local Security Checks
Title:RedHat Update for gnutls RHSA-2012:0428-01
Summary:The remote host is missing an update for the 'gnutls'; package(s) announced via the referenced advisory.
The remote host is missing an update for the 'gnutls'
package(s) announced via the referenced advisory.

Vulnerability Insight:
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

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 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.

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 and CVE-2012-1569.

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.

Affected Software/OS:
gnutls on Red Hat Enterprise Linux (v. 5 server)

Please Install the Updated Packages.

CVSS Score:

CVSS Vector:

Cross-Ref: Common Vulnerability Exposure (CVE) ID: CVE-2011-4128
RedHat Security Advisories: RHSA-2012:0429
RedHat Security Advisories: RHSA-2012:0488
RedHat Security Advisories: RHSA-2012:0531
Common Vulnerability Exposure (CVE) ID: CVE-2012-1569
Bugtraq: 20120320 Mu Dynamics, Inc. Security Advisories MU-201202-01 and MU-201202-02 for GnuTLS and Libtasn1 (Google Search)
Debian Security Information: DSA-2440 (Google Search)
RedHat Security Advisories: RHSA-2012:0427
SuSE Security Announcement: SUSE-SU-2014:0320 (Google Search)
Common Vulnerability Exposure (CVE) ID: CVE-2012-1573
BugTraq ID: 52667
Debian Security Information: DSA-2441 (Google Search)
CopyrightCopyright (c) 2012 Greenbone Networks GmbH

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