Articles / Red Hat: Updated spamassass…

Red Hat: Updated spamassassin package fixes a denial of service bug

SpamAssassin provides a way to reduce unsolicited commercial email (SPAM) from incoming email. A denial of service bug has been found in SpamAssassin. An attacker could construct a message in such a way that would cause SpamAssassin to consume CPU resources. If a number of these messages were sent it could lead to a denial of service, potentially preventing the delivery or filtering of email. Fixed packages are available from updates.redhat.com.
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                  Red Hat Security Advisory

Synopsis:          Moderate: spamassassin security update
Advisory ID:       RHSA-2005:498-01
Advisory URL:      https://rhn.redhat.com/errata/RHSA-2005-498.html
Issue date:        2005-06-23
Updated on:        2005-06-23
Product:           Red Hat Enterprise Linux
CVE Names:         CAN-2005-1266
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1. Summary:

An updated spamassassin package that fixes a denial of service bug when
parsing malformed messages is now available.

This update has been rated as having moderate security impact by the Red
Hat Security Response Team.

2. Relevant releases/architectures:

Red Hat Enterprise Linux AS version 4 - i386, ia64, ppc, s390, s390x, x86_64
Red Hat Enterprise Linux Desktop version 4 - i386, x86_64
Red Hat Enterprise Linux ES version 4 - i386, ia64, x86_64
Red Hat Enterprise Linux WS version 4 - i386, ia64, x86_64

3. Problem description:

SpamAssassin provides a way to reduce unsolicited commercial email (SPAM)
from incoming email.

A denial of service bug has been found in SpamAssassin.  An attacker could
construct a message in such a way that would cause SpamAssassin to consume
CPU resources.  If a number of these messages were sent it could lead to a
denial of service, potentially  preventing the delivery or filtering of
email. The Common Vulnerabilities and Exposures project (cve.mitre.org) has
assigned the name CAN-2005-1266 to this issue.

SpamAssassin version 3.0.4 additionally solves a number of bugs including:
- - #156390 Spamassassin consumes too much memory during learning
- - #155423 URI blacklist spam bypass
- - #147464 Users may now disable subject rewriting
- - Smarter default Bayes scores
- - Numerous other bug fixes that improve spam filter accuracy and safety

For full details, please refer to the change details of 3.0.2, 3.0.3, and
3.0.4 in SpamAssassin's online documentation at the following address:
http://wiki.apache.org/spamassassin/NextRelease

Users of SpamAssassin should update to this updated package, containing
version 3.0.4 which is not vulnerable to this issue and resolves these bugs.

4. Solution:

Before applying this update, make sure all previously released errata
relevant to your system have been applied.

This update is available via Red Hat Network.  To use Red Hat Network,
launch the Red Hat Update Agent with the following command:

up2date

This will start an interactive process that will result in the appropriate
RPMs being upgraded on your system.

5. Bug IDs fixed (http://bugzilla.redhat.com/):

147464 - spamassassin no longer allows disabling subject rewriting
151433 - spamd generate child processes which occupies all memory
159198 - CAN-2005-1266 spamassassin DoS


6. RPMs required:

Red Hat Enterprise Linux AS version 4:

SRPMS:
ftp://updates.redhat.com/enterprise/4AS/en/os/SRPMS/spamassassin-3.0.4-1.el4.src.rpm
0cfa5b1fd18aa2f410fed837928b455c  spamassassin-3.0.4-1.el4.src.rpm

i386:
c5e89bce23bff4757cb542cf56826e54  spamassassin-3.0.4-1.el4.i386.rpm

ia64:
84e256c709e69590520976c43d19c900  spamassassin-3.0.4-1.el4.ia64.rpm

ppc:
3bdc20c485ee078b6a0607cdf99bff5d  spamassassin-3.0.4-1.el4.ppc.rpm

s390:
f85e251044675dd7fb3b5d9d1c0eb674  spamassassin-3.0.4-1.el4.s390.rpm

s390x:
09f74fbccdae19059115a670d90f5f98  spamassassin-3.0.4-1.el4.s390x.rpm

x86_64:
2c44a9c80b1629af93b4543413c0c652  spamassassin-3.0.4-1.el4.x86_64.rpm

Red Hat Enterprise Linux Desktop version 4:

SRPMS:
ftp://updates.redhat.com/enterprise/4Desktop/en/os/SRPMS/spamassassin-3.0.4-1.el4.src.rpm
0cfa5b1fd18aa2f410fed837928b455c  spamassassin-3.0.4-1.el4.src.rpm

i386:
c5e89bce23bff4757cb542cf56826e54  spamassassin-3.0.4-1.el4.i386.rpm

x86_64:
2c44a9c80b1629af93b4543413c0c652  spamassassin-3.0.4-1.el4.x86_64.rpm

Red Hat Enterprise Linux ES version 4:

SRPMS:
ftp://updates.redhat.com/enterprise/4ES/en/os/SRPMS/spamassassin-3.0.4-1.el4.src.rpm
0cfa5b1fd18aa2f410fed837928b455c  spamassassin-3.0.4-1.el4.src.rpm

i386:
c5e89bce23bff4757cb542cf56826e54  spamassassin-3.0.4-1.el4.i386.rpm

ia64:
84e256c709e69590520976c43d19c900  spamassassin-3.0.4-1.el4.ia64.rpm

x86_64:
2c44a9c80b1629af93b4543413c0c652  spamassassin-3.0.4-1.el4.x86_64.rpm

Red Hat Enterprise Linux WS version 4:

SRPMS:
ftp://updates.redhat.com/enterprise/4WS/en/os/SRPMS/spamassassin-3.0.4-1.el4.src.rpm
0cfa5b1fd18aa2f410fed837928b455c  spamassassin-3.0.4-1.el4.src.rpm

i386:
c5e89bce23bff4757cb542cf56826e54  spamassassin-3.0.4-1.el4.i386.rpm

ia64:
84e256c709e69590520976c43d19c900  spamassassin-3.0.4-1.el4.ia64.rpm

x86_64:
2c44a9c80b1629af93b4543413c0c652  spamassassin-3.0.4-1.el4.x86_64.rpm

These packages are GPG signed by Red Hat for security.  Our key and
details on how to verify the signature are available from
https://www.redhat.com/security/team/key/#package

7. References:

http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-1266

8. Contact:

The Red Hat security contact is .  More contact
details at https://www.redhat.com/security/team/contact/

Copyright 2005 Red Hat, Inc.

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