- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Gentoo Linux Security Advisory                           GLSA 200608-12
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
                                            https://security.gentoo.org/
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

  Severity: High
     Title: x11vnc: Authentication bypass in included LibVNCServer code
      Date: August 07, 2006
      Bugs: #142559
        ID: 200608-12

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

Synopsis
=======
VNC servers created with x11vnc accept insecure protocol types, even
when the server does not offer it, resulting in the possibility of
unauthorized access to the server.

Background
=========
x11vnc provides VNC servers for X displays.

Affected packages
================
    -------------------------------------------------------------------
     Package          /  Vulnerable  /                      Unaffected
    -------------------------------------------------------------------
  1  x11-misc/x11vnc       < 0.8.1                            >= 0.8.1

Description
==========
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.

Resolution
=========
All x11vnc users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=x11-misc/x11vnc-0.8.1"

References
=========
  [ 1 ] CVE-2006-2450
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-2450
  [ 2 ] GLSA-200608-05
        https://security.gentoo.org/glsa/200608-05

Availability
===========
This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:

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

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
https://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.

https://creativecommons.org/licenses/by-sa/2.5/

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

VNC servers created with x11vnc accept insecure protocol types, even when the server does not offer it, resulting in the possibility of unauthorized access to the server

Summary

Gentoo Linux Security Advisory GLSA 200608-12 https://security.gentoo.org/ Severity: High Title: x11vnc: Authentication bypass in included LibVNCServer code Date: August 07, 2006 Bugs: #142559 ID: 200608-12

Synopsis ======= VNC servers created with x11vnc accept insecure protocol types, even when the server does not offer it, resulting in the possibility of unauthorized access to the server.
Background ========= x11vnc provides VNC servers for X displays.
Affected packages ================ ------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 x11-misc/x11vnc < 0.8.1 >= 0.8.1
========== x11vnc includes vulnerable LibVNCServer code, which fails to properly validate protocol types effectiv...

Read the Full Advisory

Resolution

References


Availability

Concerns

Severity

Synopsis

Background

Affected Packages

Impact

Workaround

Related News

The End of the Road for Linux 6.11: A Call to Upgrade to Kernel 6.12
3 - 5 min read
The Linux kernel community recently issued an EOL announcement regarding the 6.11 kernel series, urging sysadmins to upgrade quickly to 6.12 . This
A Linux Admin
3 - 6 min read
As 2025 approaches, we Linux admins are facing new and often unseen cloud-native security obstacles. While skilled at mitigating known risks,
Leveraging Insights from the Linux Foundation
3 - 5 min read
The Linux Foundation's recent Census III report provides critical insights for Linux administrators, information security professionals, and anyone
Chrome 131 Released: Emergency Security Update Fixes Over a Dozen Significant Vulns
3 - 6 min read
Google recently unveiled a critical security update to their popular web browser, Google Chrome, addressing over a dozen significant security
From Wayland Fixes to Security Boosts: Examining Qt 6.8.1
3 - 6 min read
The recent Qt 6.8.1 release brings significant updates and improvements, strengthening its reputation as a secure and reliable application
Exploring Arch Linux 2024.12.01: Security Implications & Notable Enhancements for Linux Admins
3 - 6 min read
The Arch Linux 2024.12.01 ISO release marks an impressive milestone, offering cutting-edge updates that enhance functionality, streamline
Deck the Halls with Enhanced Security: Linux Kernel 6.13
3 - 5 min read
As Linux admins and infosec professionals prepare for the holiday season, there's much cause for celebration this year! Linus Torvalds recently made
Lessons from Bootkitty: Securing Linux Systems Against UEFI Intrusions
3 - 5 min read
New Linux security threats mark critical junctures that challenge existing policies and test security protocols to their limit. One such milestone

Get the Latest News & Insights

Sign up to get the latest security news affecting Linux and open source delivered straight to your inbox.

© 2024 Guardian Digital, Inc All Rights Reserved