Fedora: 2004-076 Critical Alert for FreeRADIUS 0.9.3 DoS Vulnerability

The FreeRADIUS Server Project is a high performance and highly configurable

GPL'd free RADIUS server. The server is similar in some respects to

Livingston's 2.0 server. While FreeRADIUS started as a variant of the

Cistron RADIUS server, they don't share a lot in common any more. It now has

many more features than Cistron or Livingston, and is much more configurable.

FreeRADIUS is an Internet authentication daemon, which implements the RADIUS

protocol, as defined in RFC 2865 (and others). It allows Network Access

Servers (NAS boxes) to perform authentication for dial-up users. There are

also RADIUS clients available for Web servers, firewalls, Unix logins, and

more. Using RADIUS allows authentication and authorization for a network to

be centralized, and minimizes the amount of re-configuration which has to be

done when adding or deleting new users.

This version corrects a flaw in 0.9.2 (and all earlier versions of the

server) which may allow an attacker to DoS the server.

The bug does not look to be easily exploitable, as it overwrites the heap

(not the stack), and any exploit code must be in the form of a valid RADIUS

packet.

This update can be downloaded from:

45682e5adaf0d649c3f4c30a4b7cb1af SRPMS/freeradius-0.9.3-1.1.src.rpm

9642e1db1cf8955d4fc24040b73f3506 i386/freeradius-0.9.3-1.1.i386.rpm

55d0a73f2a1da031d8b3ad0775fb2512 i386/debug/freeradius-debuginfo-0.9.3-1.1.i386.rpm

421c75806a8e7e296c95ac831bccbb9d i386/freeradius-mysql-0.9.3-1.1.i386.rpm

4c5f4346bbb56bb2c09fe31183c0af6a i386/freeradius-postgresql-0.9.3-1.1.i386.rpm

7eed2b5cd2bbea4ec1064be038584caf i386/freeradius-unixODBC-0.9.3-1.1.i386.rpm

This update can also be installed with the Update Agent; you can

launch the Update Agent with the 'up2date' command.

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