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Gentoo Linux Security Advisory                           GLSA 200604-03
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                                             https://security.gentoo.org/
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   Severity: Normal
      Title: FreeRADIUS: Authentication bypass in EAP-MSCHAPv2 module
       Date: April 04, 2006
       Bugs: #127229
         ID: 200604-03

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Synopsis
=======
The EAP-MSCHAPv2 module of FreeRADIUS is affected by a validation issue
which causes some authentication checks to be bypassed.

Background
=========
FreeRADIUS is an open source RADIUS authentication server
implementation.

Affected packages
================
     -------------------------------------------------------------------
      Package                /  Vulnerable  /                Unaffected
     -------------------------------------------------------------------
   1  net-dialup/freeradius       < 1.1.1                      >= 1.1.1
                                                                < 1.0.0

Description
==========
FreeRADIUS suffers from insufficient input validation in the
EAP-MSCHAPv2 state machine.

Impact
=====
An attacker could cause the server to bypass authentication checks by
manipulating the EAP-MSCHAPv2 client state machine.

Workaround
=========
There is no known workaround at this time.

Resolution
=========
All FreeRADIUS users should upgrade to the latest version:

     # emerge --sync
     # emerge --ask --oneshot --verbose ">=net-dialup/freeradius-1.1.1"

References
=========
   [ 1 ] CVE-2006-1354
            [ 2 ] FreeRADIUS Vulnerability Notifications
         https://www.freeradius.org/security/

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

   https://security.gentoo.org/glsa/200604-03

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
https://bugs.gentoo.org/.

License
======
Copyright 2006 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.

https://creativecommons.org/licenses/by-sa/2.0/