Joined: 12 May 2004
|Posted: Mon Aug 07, 2006 6:26 pm Post subject: [ GLSA 200608-12 ] x11vnc: Authentication bypass in included
|Gentoo Linux Security Advisory
Title: x11vnc: Authentication bypass in included LibVNCServer code (GLSA 200608-12)
Date: August 07, 2006
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.
x11vnc provides VNC servers for X displays.
Vulnerable: < 0.8.1
Unaffected: >= 0.8.1
Architectures: All supported architectures
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.
An attacker could exploit this vulnerability to gain unauthorized
access with the privileges of the user running the VNC server.
There is no known workaround at this time.
All x11vnc users should upgrade to the latest version:
|# emerge --sync
# emerge --ask --oneshot --verbose ">=x11-misc/x11vnc-0.8.1"
Last edited by GLSA on Mon Jun 10, 2013 4:23 am; edited 1 time in total