- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Gentoo Linux Security Advisory GLSA 200608-05 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - http://security.gentoo.org/ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Severity: High Title: LibVNCServer: Authentication bypass Date: August 04, 2006 Bugs: #136916 ID: 200608-05 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 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