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[ GLSA 200512-18 ] XnView: Privilege escalation
From: Thierry Carrez <koon () gentoo org>
Date: Fri, 30 Dec 2005 13:43:42 +0100
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Gentoo Linux Security Advisory GLSA 200512-18 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - http://security.gentoo.org/ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Severity: Normal Title: XnView: Privilege escalation Date: December 30, 2005 Bugs: #117063 ID: 200512-18 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Synopsis ======== XnView may search for shared libraries in an untrusted location, potentially allowing local users to execute arbitrary code with the privileges of another user. Background ========== XnView is an efficient multimedia viewer, browser and converter, distributed free for non-commercial use. Affected packages ================= ------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 x11-misc/xnview < 1.70-r1 >= 1.70-r1 ------------------------------------------------------------------- # Package 1 only applies to x86 users. Description =========== Krzysiek Pawlik of Gentoo Linux discovered that the XnView package for IA32 used the DT_RPATH field insecurely, causing the dynamic loader to search for shared libraries in potentially untrusted directories. Impact ====== A local attacker could create a malicious shared object that would be loaded and executed when a user attempted to use an XnView utility. This would allow a malicious user to effectively hijack XnView and execute arbitrary code with the privileges of the user running the program. Workaround ========== The system administrator may use the chrpath utility to remove the DT_RPATH field from the XnView utilities: # emerge app-admin/chrpath # chrpath --delete /opt/bin/nconvert /opt/bin/nview /opt/bin/xnview Resolution ========== All XnView users on the x86 platform should upgrade to the latest version: # emerge --sync # emerge --ask --oneshot --verbose ">=x11-misc/xnview-1.70-r1" Availability ============ This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-200512-18.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 2005 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/2.0
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- [ GLSA 200512-18 ] XnView: Privilege escalation Thierry Carrez (Dec 30)