LibVNCServer: Authentication bypass

LibVNCServer: Authentication bypass VNC servers created with LibVNCServer accept insecure protocol types, even when the server does not offer it, resulting in unauthorized access to the server. libvncserver 2006-08-04 2006-08-04 136916 remote 0.8.2 0.8.2

LibVNCServer is a GPL'ed library for creating VNC servers.

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.

An attacker could use 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 LibVNCServer users should upgrade to the latest version:


    # emerge --sync
    # emerge --ask --oneshot --verbose ">=net-libs/libvncserver-0.8.2"

CVE-2006-2450 vorlon078 vorlon078 hlieberman