FreeRADIUS: Denial of Service

1. Gentoo Linux Security Advisory

Advisory Reference	GLSA 200704-14 / FreeRADIUS
Release Date	April 17, 2007
Latest Revision	April 17, 2007: 01
Impact	normal
Exploitable	remote

Package	Vulnerable versions	Unaffected versions	Architecture(s)
net-dialup/freeradius	< 1.1.6	>= 1.1.6	All supported architectures

Related bugreports: #174292

Synopsis

A memory leak has been discovered in FreeRADIUS, possibly allowing for a Denial of Service.

2. Impact Information

Background

FreeRADIUS is an open source RADIUS authentication server implementation.

Description

The Coverity Scan project has discovered a memory leak within the handling of certain malformed Diameter format values inside an EAP-TTLS tunnel.

Impact

A remote attacker could send a large amount of specially crafted packets to a FreeRADIUS server using EAP-TTLS authentication and exhaust all memory, possibly resulting in a Denial of Service.

3. Resolution Information

Workaround

There is no known workaround at this time.

Resolution

All FreeRADIUS users should upgrade to the latest version:

Code Listing 3.1: Resolution

# emerge --sync
# emerge --ask --oneshot --verbose ">=net-dialup/freeradius-1.1.6"

4. References

CVE-2007-2028

Page updated April 17, 2007

Summary: This is a Gentoo Linux Security Advisory

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