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

[GLSA]

Gentoo Linux Security Advisory

Title: FreeRADIUS: Authentication bypass in EAP-MSCHAPv2 module (GLSA 200604-03)
Severity: normal
Exploitable: remote
Date: April 04, 2006
Bug(s): #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: net-dialup/freeradius
Vulnerable: < 1.1.1
Unaffected: >= 1.1.1
Unaffected: < 1.0.0
Architectures: 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: