Home / vulnerabilities

PDF

glsa-200701-06.txt

Posted on 14 January 2007
Source : packetstormsecurity.org Link

 

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Gentoo Linux Security Advisory GLSA 200701-06
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
http://security.gentoo.org/
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

Severity: Normal
Title: w3m: Format string vulnerability
Date: January 12, 2007
Bugs: #159145
ID: 200701-06

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

Synopsis
========

w3m does not correctly handle format string specifiers in SSL
certificates.

Background
==========

w3m is a multi-platform text-based web browser.

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

-------------------------------------------------------------------
Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 www-client/w3m < 0.5.1-r4 >= 0.5.1-r4

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

w3m in -dump or -backend mode does not correctly handle printf() format
string specifiers in the Common Name (CN) field of an X.509 SSL
certificate.

Impact
======

An attacker could entice a user to visit a malicious website that would
load a specially crafted X.509 SSL certificate containing "%n" or other
format string specifiers, possibly resulting in the execution of
arbitrary code with the rights of the user running w3m.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All w3m users should upgrade to the latest version:

# emerge --sync
# emerge --ask --oneshot --verbose ">=www-client/w3m-0.5.1-r4"

References
==========

[ 1 ] CVE-2006-6772
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-6772

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

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

http://security.gentoo.org/glsa/glsa-200701-06.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 2007 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

 

TOP