A new update is available for Fedora Core - [SECURITY] Fedora Core 3 Update: spamassassin-3.0.4-2.fc3. Here the announcement:

Fedora Update Notification
FEDORA-2005-1065
2005-11-09
---------------------------------------------------------------------

Product : Fedora Core 3
Name : spamassassin
Version : 3.0.4
Release : 2.fc3
Summary : Spam filter for email which can be invoked from mail delivery agents.
Description :
SpamAssassin provides you with a way to reduce if not completely eliminate
Unsolicited Commercial Email (SPAM) from your incoming email. It can
be invoked by a MDA such as sendmail or postfix, or can be called from
a procmail script, .forward file, etc. It uses a genetic-algorithm
evolved scoring system to identify messages which look spammy, then
adds headers to the message so they can be filtered by the user's mail
reading software. This distribution includes the spamd/spamc components
which create a server that considerably speeds processing of mail.

To enable spamassassin, if you are receiving mail locally, simply add
this line to your ~/.procmailrc:
INCLUDERC=/etc/mail/spamassassin/spamassassin-default.rc

To filter spam for all users, add that line to /etc/procmailrc
(creating if necessary).

---------------------------------------------------------------------
Update Information:

Solves CVE-2005-3351 and a few other minor bugs to improve
spam detection accuracy. You could consider this a release
candidate for 3.0.5.

Also solved is #161785 which ensures that "service
spamassassin restart" should never fail.
---------------------------------------------------------------------
* Tue Nov 8 2005 Warren Togami <wtogami@redhat.com> - 3.0.4-2
- 3.0.5 release candidate


---------------------------------------------------------------------
This update can be downloaded from:
http://download.fedora.redhat.com/pub/fedora/linux/core/updates/3/

56f14b92c5236779c5b3af489c8bf9cb SRPMS/spamassassin-3.0.4-2.fc3.src.rpm
26650bbbcffd10b7c51cb17938cd2bab x86_64/spamassassin-3.0.4-2.fc3.x86_64.rpm
d8531902878bab7090d814a676ef62e0 x86_64/debug/spamassassin-debuginfo-3.0.4-2.fc3.x86_64.rpm
9c612854724291f958cd5ab41b8390f8 i386/spamassassin-3.0.4-2.fc3.i386.rpm
48e082f7cc4b6fed8f67ffd2f4aebbf2 i386/debug/spamassassin-debuginfo-3.0.4-2.fc3.i386.rpm

This update can also be installed with the Update Agent; you can
launch the Update Agent with the 'up2date' command.