GLSA 200711-09 MadWifi: Denial of Service
Posted on: 11/07/2007 10:55 PM

A new security update has been released for Gentoo Linux - MadWifi: Denial of Service. Here the announcement:

Gentoo Linux Security Advisory GLSA 200711-09
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http://security.gentoo.org/
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Severity: Normal
Title: MadWifi: Denial of Service
Date: November 07, 2007
Bugs: #195705
ID: 200711-09

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Synopsis
========

MadWifi does not correctly process beacon frames which can lead to a
remotely triggered Denial of Service.

Background
==========

The MadWifi driver provides support for Atheros based IEEE 802.11
Wireless Lan cards.

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

-------------------------------------------------------------------
Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 net-wireless/madwifi-ng lt; 0.9.3.3 gt;= 0.9.3.3

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

Clemens Kolbitsch and Sylvester Keil reported an error when processing
beacon frames with an overly large "length" value in the "xrates"
element.

Impact
======

A remote attacker could act as an access point and send a specially
crafted packet to an Atheros based wireless client, possibly resulting
in a Denial of Service (kernel panic).

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All MadWifi users should upgrade to the latest version:

# emerge --sync
# emerge --ask --oneshot --verbose "gt;=net-wireless/madwifi-ng-0.9.3.3"

References
==========

[ 1 ] CVE-2007-5448
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-5448

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

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

http://security.gentoo.org/glsa/glsa-200711-09.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@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



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