- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Gentoo Linux Security Advisory GLSA 200511-09 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - http://security.gentoo.org/ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Severity: Normal Title: Lynx: Arbitrary command execution Date: November 13, 2005 Bugs: #112213 ID: 200511-09 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Synopsis ======== Lynx is vulnerable to an issue which allows 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 < 2.8.5-r2 >= 2.8.5-r2 Description =========== iDefense labs discovered a problem within the feature to execute local cgi-bin programs via the "lynxcgi:" URI handler. Due to a configuration error, the default settings allow websites to specify commands to run as the user running Lynx. Impact ====== A remote attacker can entice a user to access a malicious HTTP server, causing Lynx to execute arbitrary commands. Workaround ========== Disable "lynxcgi" links by specifying the following directive in lynx.cfg: TRUSTED_LYNXCGI:none Resolution ========== All Lynx users should upgrade to the latest version: # emerge --sync # emerge --ask --oneshot --verbose ">=www-client/lynx-2.8.5-r2" References ========== [ 1 ] CVE-2005-2929 http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2005-2929 [ 2 ] iDefense Security Advisory 11.11.05 http://www.idefense.com/application/poi/display?id=338&type=vulnerabilities Availability ============ This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-200511-09.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 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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