Home / mailings [gentoo-announce] [ GLSA 200909-15 ] Lynx: Arbitrary command execution
Posted on 12 September 2009
Gentoo-announce--Sig_/Kr.K_ORNm_Gjqn3zXKHDpxA
Content-Type: text/plain; charset=US-ASCII
Content-Transfer-Encoding: quoted-printable
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
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
--Sig_/Kr.K_ORNm_Gjqn3zXKHDpxA
Content-Type: application/pgp-signature; name=signature.asc
Content-Disposition: attachment; filename=signature.asc
