[Full-disclosure] [ GLSA 200704-15 ] MadWifi: Multiple vulnerabilities

[Raphael Marichez]

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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 at 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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