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

high Nessus Plugin ID 22171

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.

Solution

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

See Also

https://security.gentoo.org/glsa/200608-05

https://security.gentoo.org/glsa/200608-12

Plugin Details

Severity: High

ID: 22171

File Name: gentoo_GLSA-200608-12.nasl

Version: 1.17

Type: local

Published: 8/8/2006

Updated: 1/6/2021

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.6

CVSS v2

Risk Factor: High

Base Score: 7.5

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P

Vulnerability Information

CPE: p-cpe:/a:gentoo:linux:x11vnc, cpe:/o:gentoo:linux

Required KB Items: Host/local_checks_enabled, Host/Gentoo/release, Host/Gentoo/qpkg-list

Patch Publication Date: 8/7/2006

Reference Information

CVE: CVE-2006-2450

GLSA: 200608-12