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FreeRADIUS: Denial of Service


1.  Gentoo Linux Security Advisory

Version Information

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


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

2.  Impact Information


FreeRADIUS is an open source RADIUS authentication server implementation.


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


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


There is no known workaround at this time.


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


Page updated April 17, 2007

Summary: This is a Gentoo Linux Security Advisory

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