A new security update has been released for Gentoo Linux - MadWifi: Multiple vulnerabilities. Here the announcement:
Gentoo Linux Security Advisory GLSA 200704-15
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http://security.gentoo.org/
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Severity: Normal
Title: MadWifi: Multiple vulnerabilities
Date: April 17, 2007
Bugs: #173434
ID: 200704-15
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Synopsis
========
Multiple vulnerabilities have been discovered in the MadWifi driver,
possibly leading to a Denial of Service and information disclosure.
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 >= 0.9.3
Description
===========
The driver does not properly process Channel Switch Announcement
Information Elements, allowing for an abnormal channel change. The
ieee80211_input() function does not properly handle AUTH frames and the
driver sends unencrypted packets before WPA authentication succeeds.
Impact
======
A remote attacker could send specially crafted AUTH frames to the
vulnerable host, resulting in a Denial of Service by crashing the
kernel. A remote attacker could gain access to sensitive information
about network architecture by sniffing unencrypted packets. A remote
attacker could also send a Channel Switch Count less than or equal to
one to trigger a channel change, resulting in a communication loss and
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"
References
==========
[ 1 ] CVE-2007-7178
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-7178
[ 2 ] CVE-2007-7179
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-7179
[ 3 ] CVE-2007-7180
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-7180
Availability
============
This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:
http://security.gentoo.org/glsa/glsa-200704-15.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 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
