From: Sune Kloppenborg Jeppesen <jaervosz@gentoo.org.>
To: gentoo-announce@gentoo.org
Subject: [ GLSA 200608-05 ] LibVNCServer: Authentication bypass
Date: Fri, 4 Aug 2006 06:49:17 +0200
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Cc: bugtraq@securityfocus.com, full-disclosure@lists.grok.org.uk,
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Organization: Gentoo Linux Security Team
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Gentoo Linux Security Advisory GLSA 200608-05
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http://security.gentoo.org/
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Severity: High
Title: LibVNCServer: Authentication bypass
Date: August 04, 2006
Bugs: #136916
ID: 200608-05
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Synopsis
========
VNC servers created with LibVNCServer accept insecure protocol types,
even when the server does not offer it, resulting in unauthorized
access to the server.
Background
==========
LibVNCServer is a GPL'ed library for creating VNC servers.
Affected packages
=================
-------------------------------------------------------------------
Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 net-libs/libvncserver < 0.8.2 >= 0.8.2
Description
===========
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.
Resolution
==========
All LibVNCServer users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=net-libs/libvncserver-0.8.2"
References
==========
[ 1 ] CVE-2006-2450
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-2450
Availability
============
This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:
http://security.gentoo.org/glsa/glsa-200608-05.xml
Concerns?
=========
Security is a primary focus of Gentoo Linux and ensuring the
confidentiality and security of our users machines is of utmost
importance to us. Any security concerns should be addressed to
security@gentoo.org or alternatively, you may file a bug at
http://bugs.gentoo.org.
License
=======
Copyright 2006 Gentoo Foundation, Inc; referenced text
belongs to its owner(s).
The contents of this document are licensed under the
Creative Commons - Attribution / Share Alike license.
http://creativecommons.org/licenses/by-sa/2.5
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