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TUCoPS :: Linux :: General :: tb13327.htm

MadWifi: Denial of Service



MadWifi: Denial of Service
MadWifi: Denial of Service



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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      < 0.9.3.3                 >= 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 ">=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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