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[ GLSA 200709-11 ] GDM: Local Denial of Service
From: Raphael Marichez <falco () gentoo org>
Date: Tue, 18 Sep 2007 23:33:55 +0200
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Gentoo Linux Security Advisory GLSA 200709-11 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - http://security.gentoo.org/ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Severity: Low Title: GDM: Local Denial of Service Date: September 18, 2007 Bugs: #187919 ID: 200709-11 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Synopsis ======== GDM can be crashed by a local user, preventing it from managing future displays. Background ========== GDM is the GNOME display manager. Affected packages ================= ------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 gnome-base/gdm < 2.18.4 >= 2.18.4 *>= 2.16.7 Description =========== The result of a g_strsplit() call is incorrectly parsed in the files daemon/gdm.c, daemon/gdmconfig.c, gui/gdmconfig.c and gui/gdmflexiserver.c, allowing for a null pointer dereference. Impact ====== A local user could send a crafted message to /tmp/.gdm_socket that would trigger the null pointer dereference and crash GDM, thus preventing it from managing future displays. Workaround ========== Restrict the write permissions on /tmp/.gdm_socket to trusted users only after each GDM restart. Resolution ========== All GDM users should upgrade to the latest version: # emerge --sync # emerge --ask --oneshot --verbose "gnome-base/gdm" References ========== [ 1 ] CVE-2007-3381 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-3381 Availability ============ This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-200709-11.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 2007 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 200709-11 ] GDM: Local Denial of Service Raphael Marichez (Sep 18)