[ GLSA 201706-27 ] FreeRADIUS

[GLSA]

Gentoo Linux Security Advisory

Title: FreeRADIUS: Security bypass (GLSA 201706-27)
Severity: normal
Exploitable: remote
Date: 2017-06-27
Bug(s): #620186
ID: 201706-27

Synopsis

A vulnerability in FreeRADIUS might allow remote attackers to
bypass authentication.


Background

FreeRADIUS is an open source RADIUS authentication server.

Affected Packages

Package: net-dialup/freeradius
Vulnerable: < 3.0.14
Unaffected: >= 3.0.14
Architectures: All supported architectures


Description

It was discovered that the implementation of TTLS and PEAP in FreeRADIUS
skips inner authentication when it handles a resumed TLS connection. The
affected versions of FreeRADIUS fails to reliably prevent the resumption
of unauthenticated sessions unless the TLS session cache is disabled
completely.


Impact

An unauthenticated remote user can bypass authentication by starting a
session, and then resuming an unauthenticated TLS session before inner
authentication has been completed successfully.


Workaround

Set “enabled = no” in the cache subsection of eap module settings to
disable TLS session caching.


Resolution

All FreeRADIUS users should upgrade to the latest version: