GLSA-200608-12 : x11vnc: Authentication bypass in included LibVNCServer code

This script is Copyright (C) 2006-2014 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-200608-12
(x11vnc: Authentication bypass in included LibVNCServer code)

x11vnc includes vulnerable LibVNCServer code, which fails to properly
validate protocol types effectively letting users decide what protocol
to use, such as 'Type 1 - None' (GLSA-200608-05). x11vnc will accept
this security type, even if it is not offered by the server.

Impact :

An attacker could exploit this vulnerability to gain unauthorized
access with the privileges of the user running the VNC server.

Workaround :

There is no known workaround at this time.

See also :

http://www.gentoo.org/security/en/glsa/glsa-200608-05.xml
http://www.gentoo.org/security/en/glsa/glsa-200608-12.xml

Solution :

All x11vnc users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose '>=x11-misc/x11vnc-0.8.1'

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: 22171 (gentoo_GLSA-200608-12.nasl)

Bugtraq ID:

CVE ID: CVE-2006-2450