GLSA 201706-27: FreeRADIUS: Security bypass

http://security.gentoo.org/

Severity:	normal
Title:	FreeRADIUS: Security bypass
Date:	06/27/2017
Bugs:	#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	Vulnerable	Unaffected	Architecture(s)
net-dialup/freeradius	< 3.0.14	>= 3.0.14	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:

      # emerge --sync
      # emerge --ask --oneshot --verbose ">=net-dialup/freeradius-3.0.14"

References

CVE-2017-9148

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-201706-27.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.