A new security update has been released for Gentoo Linux - MadWifi: Multiple vulnerabilities. Here the announcement:

Gentoo Linux Security Advisory GLSA 200706-04
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http://security.gentoo.org/
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Severity: High
Title: MadWifi: Multiple vulnerabilities
Date: June 11, 2007
Bugs: #179532
ID: 200706-04

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Synopsis
========

Multiple vulnerabilities have been discovered in MadWifi, possibly
allowing for the execution of arbitrary code or a 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 < 0.9.3.1 >= 0.9.3.1

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

Md Sohail Ahmad from AirTight Networks has discovered a divison by zero
in the ath_beacon_config() function (CVE-2007-2830). The vendor has
corrected an input validation error in the
ieee80211_ioctl_getwmmparams() and ieee80211_ioctl_getwmmparams()
functions(CVE-207-2831), and an input sanitization error when parsing
nested 802.3 Ethernet frame lengths (CVE-2007-2829).

Impact
======

An attacker could send specially crafted packets to a vulnerable host
to exploit one of these vulnerabilities, possibly resulting in the
execution of arbitrary code with root privileges, or a Denial of
Service.

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-0.9.3.1"

References
==========

[ 1 ] CVE-2007-2829
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-2829
[ 2 ] CVE-2007-2830
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-2830
[ 3 ] CVE-2007-2831
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-2831

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

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

http://security.gentoo.org/glsa/glsa-200706-04.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