GLSA-200511-07 : OpenVPN: Multiple vulnerabilities

This script is Copyright (C) 2005-2014 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-200511-07
(OpenVPN: Multiple vulnerabilities)

The OpenVPN client contains a format string bug in the handling of
the foreign_option in options.c. Furthermore, when the OpenVPN server
runs in TCP mode, it may dereference a NULL pointer under specific
error conditions.

Impact :

A remote attacker could setup a malicious OpenVPN server and trick
the user into connecting to it, potentially executing arbitrary code on
the client's computer. A remote attacker could also exploit the NULL
dereference issue by sending specific packets to an OpenVPN server
running in TCP mode, resulting in a Denial of Service condition.

Workaround :

Do not use 'pull' or 'client' options in the OpenVPN client
configuration file, and use UDP mode for the OpenVPN server.

See also :

http://openvpn.net/changelog.html
http://www.gentoo.org/security/en/glsa/glsa-200511-07.xml

Solution :

All OpenVPN users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose '>=net-misc/openvpn-2.0.4'

Risk factor :

High / CVSS Base Score : 7.5
(CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P)

Family: Gentoo Local Security Checks

Nessus Plugin ID: 20157 (gentoo_GLSA-200511-07.nasl)

Bugtraq ID:

CVE ID: CVE-2005-3393
CVE-2005-3409