[ GLSA 200511-09 ] Lynx: Arbitrary command execution
Date: Sun, 13 Nov 2005 18:14:35 +0100
From: Thierry Carrez <koon@gentoo.org.>
To: [email protected]
Subject: [ GLSA 200511-09 ] Lynx: Arbitrary command execution
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Gentoo Linux Security Advisory GLSA 200511-09
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http://security.gentoo.org/
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Severity: Normal
Title: Lynx: Arbitrary command execution
Date: November 13, 2005
Bugs: #112213
ID: 200511-09
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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
[email protected] 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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