GLSA 200510-15 Lynx: Buffer overflow in NNTP processing
Posted on: 10/17/2005 09:22 AM

A new security update has been released for Gentoo Linux - Lynx: Buffer overflow in NNTP processing. Here the announcement:

Gentoo Linux Security Advisory GLSA 200510-15
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
http://security.gentoo.org/
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

Severity: Normal
Title: Lynx: Buffer overflow in NNTP processing
Date: October 17, 2005
Bugs: #108451
ID: 200510-15

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

Synopsis
========

Lynx contains a buffer overflow that may be exploited to execute
arbitrary code.

Background
==========

Lynx is a text-mode browser for the World Wide Web. It supports
multiple URL types, including HTTP and NNTP URLs.

Affected packages
=================

-------------------------------------------------------------------
Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 www-client/lynx lt; 2.8.5-r1 gt;= 2.8.5-r1

Description
===========

When accessing a NNTP URL, Lynx connects to a NNTP server and retrieves
information about the available articles in the target newsgroup. Ulf
Harnhammar discovered a buffer overflow in a function that handles the
escaping of special characters.

Impact
======

An attacker could setup a malicious NNTP server and entice a user to
access it using Lynx (either by creating NNTP links on a web page or by
forcing a redirect for Lynx users). The data returned by the NNTP
server would trigger the buffer overflow and execute arbitrary code
with the rights of the user running Lynx.

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 "gt;=www-client/lynx-2.8.5-r1"

References
==========

[ 1 ] CAN-2005-3120
http://cve.mitre.org/cgi-bin/cvename.cgi?nameƊN-2005-3120

Availability
============

This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:

http://security.gentoo.org/glsa/glsa-200510-15.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
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



Printed from Linux Compatible (http://www.linuxcompatible.org/news/story/glsa_200510_15_lynx_buffer_overflow_in_nntp_processing.html)