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[ GLSA 200909-15 ] Lynx: Arbitrary command execution
From: Alex Legler <a3li () gentoo org>
Date: Sat, 12 Sep 2009 18:29:56 +0200
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Gentoo Linux Security Advisory GLSA 200909-15 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - http://security.gentoo.org/ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Severity: Normal Title: Lynx: Arbitrary command execution Date: September 12, 2009 Bugs: #243058 ID: 200909-15 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Synopsis ======== An incomplete fix for an issue related to the Lynx URL handler might allow for the remote execution of arbitrary commands. Background ========== Lynx is a fully-featured WWW client for users running cursor-addressable, character-cell display devices such as vt100 terminals and terminal emulators. Affected packages ================= ------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 www-client/lynx < 2.8.6-r4 >= 2.8.6-r4 Description =========== Clint Ruoho reported that the fix for CVE-2005-2929 (GLSA 200511-09) only disabled the lynxcgi:// handler when not using the advanced mode. Impact ====== A remote attacker can entice a user to access a malicious HTTP server, causing Lynx to execute arbitrary commands. NOTE: The advanced mode is not enabled by default. Successful exploitation requires the "lynxcgi://" protocol to be registered with lynx on the victim's system. Workaround ========== There is no known workaround at this time. Resolution ========== All Lynx users should upgrade to the latest version: # emerge --sync # emerge --ask --oneshot --verbose =www-client/lynx-2.8.6-r4 References ========== [ 1 ] CVE-2005-2929 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2005-2929 [ 2 ] CVE-2008-4690 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-4690 [ 3 ] GLSA 200511-09 http://www.gentoo.org/security/en/glsa/glsa-200511-09.xml Availability ============ This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-200909-15.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 https://bugs.gentoo.org. License ======= Copyright 2009 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 200909-15 ] Lynx: Arbitrary command execution Alex Legler (Sep 12)