- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 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@xxxxxxxxxx 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
Attachment:
pgpExypS4V4oj.pgp
Description: PGP signature