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Test ID:1.3.6.1.4.1.25623.1.0.871173
Category:Red Hat Local Security Checks
Title:RedHat Update for gnutls RHSA-2014:0594-01
Summary:The remote host is missing an update for the 'gnutls'; package(s) announced via the referenced advisory.
Description:Summary:
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). The gnutls packages also
include the libtasn1 library, which provides Abstract Syntax Notation One
(ASN.1) parsing and structures management, and Distinguished Encoding Rules
(DER) encoding and decoding functions.

A flaw was found in the way GnuTLS parsed session IDs from ServerHello
messages of the TLS/SSL handshake. A malicious server could use this flaw
to send an excessively long session ID value, which would trigger a buffer
overflow in a connecting TLS/SSL client application using GnuTLS, causing
the client application to crash or, possibly, execute arbitrary code.
(CVE-2014-3466)

It was discovered that the asn1_get_bit_der() function of the libtasn1
library incorrectly reported the length of ASN.1-encoded data. Specially
crafted ASN.1 input could cause an application using libtasn1 to perform
an out-of-bounds access operation, causing the application to crash or,
possibly, execute arbitrary code. (CVE-2014-3468)

Multiple incorrect buffer boundary check issues were discovered in
libtasn1. Specially crafted ASN.1 input could cause an application using
libtasn1 to crash. (CVE-2014-3467)

Multiple NULL pointer dereference flaws were found in libtasn1's
asn1_read_value() function. Specially crafted ASN.1 input could cause an
application using libtasn1 to crash, if the application used the
aforementioned function in a certain way. (CVE-2014-3469)

Red Hat would like to thank GnuTLS upstream for reporting these issues.
Upstream acknowledges Joonas Kuorilehto of Codenomicon as the original
reporter of CVE-2014-3466.

Users of GnuTLS are advised to upgrade to these updated packages, which
correct these issues. For the update to take effect, all applications
linked to the GnuTLS or libtasn1 library must be restarted.

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

Solution:
Please Install the Updated Packages.

CVSS Score:
7.5

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

Cross-Ref: Common Vulnerability Exposure (CVE) ID: CVE-2014-3466
BugTraq ID: 67741
http://www.securityfocus.com/bid/67741
Debian Security Information: DSA-2944 (Google Search)
http://www.debian.org/security/2014/dsa-2944
http://radare.today/technical-analysis-of-the-gnutls-hello-vulnerability/
RedHat Security Advisories: RHSA-2014:0594
http://rhn.redhat.com/errata/RHSA-2014-0594.html
RedHat Security Advisories: RHSA-2014:0595
http://rhn.redhat.com/errata/RHSA-2014-0595.html
RedHat Security Advisories: RHSA-2014:0684
http://rhn.redhat.com/errata/RHSA-2014-0684.html
RedHat Security Advisories: RHSA-2014:0815
http://rhn.redhat.com/errata/RHSA-2014-0815.html
http://www.securitytracker.com/id/1030314
http://secunia.com/advisories/58340
http://secunia.com/advisories/58598
http://secunia.com/advisories/58601
http://secunia.com/advisories/58642
http://secunia.com/advisories/59016
http://secunia.com/advisories/59021
http://secunia.com/advisories/59057
http://secunia.com/advisories/59086
http://secunia.com/advisories/59408
http://secunia.com/advisories/59838
http://secunia.com/advisories/60384
SuSE Security Announcement: SUSE-SU-2014:0758 (Google Search)
http://lists.opensuse.org/opensuse-security-announce/2014-06/msg00002.html
SuSE Security Announcement: SUSE-SU-2014:0788 (Google Search)
http://lists.opensuse.org/opensuse-security-announce/2014-06/msg00015.html
SuSE Security Announcement: openSUSE-SU-2014:0763 (Google Search)
http://lists.opensuse.org/opensuse-security-announce/2014-06/msg00007.html
SuSE Security Announcement: openSUSE-SU-2014:0767 (Google Search)
http://lists.opensuse.org/opensuse-security-announce/2014-06/msg00010.html
http://www.ubuntu.com/usn/USN-2229-1
Common Vulnerability Exposure (CVE) ID: CVE-2014-3467
Debian Security Information: DSA-3056 (Google Search)
http://www.debian.org/security/2014/dsa-3056
http://www.mandriva.com/security/advisories?name=MDVSA-2015:116
http://lists.gnu.org/archive/html/help-libtasn1/2014-05/msg00006.html
RedHat Security Advisories: RHSA-2014:0596
http://rhn.redhat.com/errata/RHSA-2014-0596.html
RedHat Security Advisories: RHSA-2014:0687
http://rhn.redhat.com/errata/RHSA-2014-0687.html
http://secunia.com/advisories/58591
http://secunia.com/advisories/58614
http://secunia.com/advisories/60320
http://secunia.com/advisories/60415
http://secunia.com/advisories/61888
Common Vulnerability Exposure (CVE) ID: CVE-2014-3468
Common Vulnerability Exposure (CVE) ID: CVE-2014-3469
CopyrightCopyright (C) 2014 Greenbone Networks GmbH

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