GLSA-200805-20 : GnuTLS: Execution of arbitrary code

This script is Copyright (C) 2008-2014 Tenable Network Security, Inc.


Synopsis :

The remote Gentoo host is missing one or more security-related
patches.

Description :

The remote host is affected by the vulnerability described in GLSA-200805-20
(GnuTLS: Execution of arbitrary code)

Ossi Herrala and Jukka Taimisto of Codenomicon reported three
vulnerabilities in libgnutls of GnuTLS:
'Client Hello' messages containing an invalid server name can lead to a
buffer overflow when evaluating 'Security Parameters' (CVE-2008-1948).
Multiple 'Client Hello' messages can lead to a NULL pointer dereference
(CVE-2008-1949).
A TLS handshake including an encrypted 'Client Hello' message and an
invalid record length could lead to a buffer overread (CVE-2008-1950).

Impact :

Unauthenticated remote attackers could exploit these vulnerabilities to
cause Denial of Service conditions in daemons using GnuTLS. The first
vulnerability (CVE-2008-1948) might allow for the execution of
arbitrary code with the privileges of the daemon handling incoming TLS
connections.

Workaround :

There is no known workaround at this time.

See also :

http://www.gentoo.org/security/en/glsa/glsa-200805-20.xml

Solution :

All GnuTLS users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose '>=net-libs/gnutls-2.2.5'

Risk factor :

Critical / CVSS Base Score : 10.0
(CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C)

Family: Gentoo Local Security Checks

Nessus Plugin ID: 32418 (gentoo_GLSA-200805-20.nasl)

Bugtraq ID:

CVE ID: CVE-2008-1948
CVE-2008-1949
CVE-2008-1950