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[ GLSA 201110-19 ] X.Org X Server: Multiple vulnerabilities
From: Alex Legler <a3li () gentoo org>
Date: Sat, 22 Oct 2011 19:43:22 +0200
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Gentoo Linux Security Advisory GLSA 201110-19 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - http://security.gentoo.org/ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Severity: Normal Title: X.Org X Server: Multiple vulnerabilities Date: October 22, 2011 Bugs: #387069 ID: 201110-19 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Synopsis ======== Multiple vulnerabilities in the X.Org X server might allow local attackers to disclose information. Background ========== The X Window System is a graphical windowing system based on a client/server model. Affected packages ================= ------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 x11-base/xorg-server < 1.10.4-r1 *>= 1.9.5-r1 >= 1.10.4-r1 Description =========== vladz reported the following vulnerabilities in the X.Org X server: * The X.Org X server follows symbolic links when trying to access the lock file for a X display, showing a predictable behavior depending on the file type of the link target (CVE-2011-4028). * The X.Org X server lock file mechanism allows for a race condition to cause the X server to modify the file permissions of an arbitrary file to 0444 (CVE-2011-4029). Impact ====== A local attacker could exploit these vulnerabilities to disclose information by making arbitrary files on a system world-readable or gain information whether a specified file exists on the system and whether it is a file, directory, or a named pipe. Workaround ========== There is no known workaround at this time. Resolution ========== All X.Org X Server 1.9 users should upgrade to the latest 1.9 version: # emerge --sync # emerge --ask --oneshot --verbose ">=x11-base/xorg-server-1.9.5-r1" All X.Org X Server 1.10 users should upgrade to the latest version: # emerge --sync # emerge --ask --oneshot --verbose ">=x11-base/xorg-server-1.10.4-r1" References ========== [ 1 ] CVE-2011-4028 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2011-4028 [ 2 ] CVE-2011-4029 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2011-4029 Availability ============ This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-201110-19.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 https://bugs.gentoo.org. License ======= Copyright 2011 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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- [ GLSA 201110-19 ] X.Org X Server: Multiple vulnerabilities Alex Legler (Oct 22)