- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Gentoo Linux Security Advisory GLSA 200606-23 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - http://security.gentoo.org/ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Severity: Normal Title: KDM: Symlink vulnerability Date: June 22, 2006 Bugs: #136201 ID: 200606-23 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Synopsis ======== KDM is vulnerable to a symlink vulnerability that can lead to disclosure of information. Background ========== KDE is a feature-rich graphical desktop environment for Linux and Unix-like Operating Systems. KDM is the KDE Display Manager and is part of the kdebase package. Affected packages ================= ------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 kde-base/kdebase < 3.5.2-r2 >= 3.5.2-r2 *>= 3.4.3-r2 2 kde-base/kdm < 3.5.2-r2 >= 3.5.2-r2 *>= 3.4.3-r2 ------------------------------------------------------------------- 2 affected packages on all of their supported architectures. ------------------------------------------------------------------- Description =========== Ludwig Nussel discovered that KDM could be tricked into allowing users to read files that would otherwise not be readable. Impact ====== A local attacker could exploit this issue to obtain potentially sensitive information that is usually not accessable to the local user such as shadow files or other user's files. The default Gentoo user running KDM is root and, as a result, the local attacker can read any file. Workaround ========== There is no known workaround at this time. Resolution ========== All kdebase users should upgrade to the latest version: # emerge --sync # emerge --ask --oneshot --verbose kde-base/kdebase All KDE split ebuild users should upgrade to the latest KDM version: # emerge --sync # emerge --ask --oneshot --verbose kde-base/kdm References ========== [ 1 ] KDE Security Advisory: KDM symlink attack vulnerability http://www.kde.org/info/security/advisory-20060614-1.txt [ 2 ] CVE-2006-2449 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-2449 Availability ============ This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-200606-23.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@xxxxxxxxxx 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
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