GLSA-200608-05 : LibVNCServer: Authentication bypass

High Nessus Plugin ID 22147


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


The remote host is affected by the vulnerability described in GLSA-200608-05 (LibVNCServer: Authentication bypass)

LibVNCServer fails to properly validate protocol types effectively letting users decide what protocol to use, such as 'Type 1 - None'.
LibVNCServer will accept this security type, even if it is not offered by the server.
Impact :

An attacker could use 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.


All LibVNCServer users should upgrade to the latest version:
# emerge --sync # emerge --ask --oneshot --verbose '>=net-libs/libvncserver-0.8.2'

See Also

Plugin Details

Severity: High

ID: 22147

File Name: gentoo_GLSA-200608-05.nasl

Version: $Revision: 1.11 $

Type: local

Published: 2006/08/04

Modified: 2015/04/13

Dependencies: 12634

Risk Information

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:libvncserver, cpe:/o:gentoo:linux

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

Patch Publication Date: 2006/08/04

Vulnerability Publication Date: 2006/07/05

Reference Information

CVE: CVE-2006-2450

OSVDB: 27137

GLSA: 200608-05