RHEL 5 : gnutls (RHSA-2012:0428)

medium Nessus Plugin ID 58509
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VPR Score: 3.6

Synopsis

The remote Red Hat host is missing one or more security updates.

Description

Updated gnutls packages that fix three security issues are now available for Red Hat Enterprise Linux 5.

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.

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)

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.

Solution

Update the affected packages.

See Also

https://access.redhat.com/errata/RHSA-2012:0428

https://access.redhat.com/security/cve/cve-2012-1569

https://access.redhat.com/security/cve/cve-2011-4128

https://access.redhat.com/security/cve/cve-2012-1573

Plugin Details

Severity: Medium

ID: 58509

File Name: redhat-RHSA-2012-0428.nasl

Version: 1.22

Type: local

Agent: unix

Published: 3/28/2012

Updated: 1/14/2021

Dependencies: ssh_get_info.nasl

Risk Information

Risk Factor: Medium

VPR Score: 3.6

CVSS v2.0

Base Score: 5

Temporal Score: 3.7

Vector: AV:N/AC:L/Au:N/C:N/I:N/A:P

Temporal Vector: E:U/RL:OF/RC:C

Vulnerability Information

CPE: p-cpe:/a:redhat:enterprise_linux:gnutls, p-cpe:/a:redhat:enterprise_linux:gnutls-debuginfo, p-cpe:/a:redhat:enterprise_linux:gnutls-devel, p-cpe:/a:redhat:enterprise_linux:gnutls-utils, cpe:/o:redhat:enterprise_linux:5

Required KB Items: Host/local_checks_enabled, Host/RedHat/release, Host/RedHat/rpm-list, Host/cpu

Exploit Ease: No known exploits are available

Patch Publication Date: 3/27/2012

Vulnerability Publication Date: 12/8/2011

Reference Information

CVE: CVE-2011-4128, CVE-2012-1569, CVE-2012-1573

BID: 50609, 52667, 52668

RHSA: 2012:0428