GLSA 200604-03: FreeRADIUS: Authentication bypass in EAP-MSCHAPv2 module

http://security.gentoo.org/

Severity:	normal
Title:	FreeRADIUS: Authentication bypass in EAP-MSCHAPv2 module
Date:	04/04/2006
Bugs:	#127229
ID:	200604-03

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	Architecture(s)
net-dialup/freeradius	< 1.1.1	>= 1.1.1	All supported architectures

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

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-200604-03.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 https://bugs.gentoo.org.