Bugtraq mailing list archives
[ GLSA 200609-07 ] LibXfont, monolithic X.org: Multiple integer overflows
From: Sune Kloppenborg Jeppesen <jaervosz () gentoo org>
Date: Wed, 13 Sep 2006 19:08:42 +0200
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Gentoo Linux Security Advisory GLSA 200609-07 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - http://security.gentoo.org/ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Severity: High Title: LibXfont, monolithic X.org: Multiple integer overflows Date: September 13, 2006 Bugs: #145513 ID: 200609-07 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Synopsis ======== Some buffer overflows were discovered in the CID font parser, potentially resulting in the execution of arbitrary code with elevated privileges. Background ========== libXfont is the X.Org Xfont library, some parts are based on the FreeType code base. Affected packages ================= ------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 x11-libs/libXfont < 1.2.1 >= 1.2.1 2 x11-base/xorg-x11 < 7.0 >= 7.0 ------------------------------------------------------------------- 2 affected packages on all of their supported architectures. ------------------------------------------------------------------- Description =========== Several integer overflows have been found in the CID font parser. Impact ====== A remote attacker could exploit this vulnerability by enticing a user to load a malicious font file resulting in the execution of arbitrary code with the permissions of the user running the X server which typically is the root user. A local user could exploit this vulnerability to gain elevated privileges. Workaround ========== Disable CID-encoded Type 1 fonts by removing the "type1" module and replacing it with the "freetype" module in xorg.conf. Resolution ========== All libXfont users should upgrade to the latest version: # emerge --sync # emerge --ask --oneshot --verbose ">=x11-libs/libXfont-1.2.1" All monolithic X.org users are advised to migrate to modular X.org. References ========== [ 1 ] CVE-2006-3739 http://cve.mitre.org/cgi-bin/cvename.cgi?name=2006-3739 [ 2 ] CVE-2006-3740 http://cve.mitre.org/cgi-bin/cvename.cgi?name=2006-3740 Availability ============ This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-200609-07.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
Attachment:
_bin
Description:
Current thread:
- [ GLSA 200609-07 ] LibXfont, monolithic X.org: Multiple integer overflows Sune Kloppenborg Jeppesen (Sep 13)