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Red Hat: mailman Denial of service vulnerability Print E-mail
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Posted by Team   
RedHat Linux An updated mailman package that closes a DoS vulnerability in mailman introduced by RHSA-2004:019 is now available.

Red Hat Security Advisory

Synopsis:          Updated mailman package closes DoS vulnerability
Advisory ID:       RHSA-2004:156-01
Issue date:        2004-04-14
Updated on:        2004-04-14
Product:           Red Hat Enterprise Linux
Cross references:  
Obsoletes:         RHSA-2004:019
CVE Names:         CAN-2004-0182
- ---------------------------------------------------------------------

1. Topic:

An updated mailman package that closes a DoS vulnerability in mailman
introduced by RHSA-2004:019 is now available.

2. Relevant releases/architectures:

Red Hat Enterprise Linux AS (Advanced Server) version 2.1 - i386, ia64
Red Hat Linux Advanced Workstation 2.1 - ia64
Red Hat Enterprise Linux ES version 2.1 - i386

3. Problem description:

Mailman is a mailing list manager.

On February 19 2004, Red Hat issued security erratum RHSA-2004:019 to
correct a DoS (Denial of Service) vulnerability where an attacker could
send a carefully-crafted message and cause mailman to crash. 

Matthew Saltzman discovered a flaw in our original patch intended to
correct this vulnerability.  This flaw can cause mailman to crash if it
receives an email destined for a list with an empty subject field.  The
Common Vulnerabilities and Exposures project ( has assigned
the name CAN-2004-0182 to this issue.

Users of Mailman are advised to upgrade to these updated packages, which
include an updated patch and are not vulnerable to this issue.

4. Solution:

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

To update all RPMs for your particular architecture, run:

rpm -Fvh [filenames]

where [filenames] is a list of the RPMs you wish to upgrade.  Only those
RPMs which are currently installed will be updated.  Those RPMs which are
not installed but included in the list will not be updated.  Note that you
can also use wildcards (*.rpm) if your current directory *only* contains the
desired RPMs.

Please note that this update is also available via Red Hat Network.  Many
people find this an easier way to apply updates.  To use Red Hat Network,
launch the Red Hat Update Agent with the following command:


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

If up2date fails to connect to Red Hat Network due to SSL
Certificate Errors, you need to install a version of the
up2date client with an updated certificate.  The latest version of
up2date is available from the Red Hat FTP site and may also be
downloaded directly from the RHN website:

5. Bug IDs fixed  ( for more info):

118669 - DoS: qrunner fails if no Subject field in message header

6. RPMs required:

Red Hat Enterprise Linux AS (Advanced Server) version 2.1:


Available from Red Hat Network: mailman-2.0.13-6.i386.rpm

Available from Red Hat Network: mailman-2.0.13-6.ia64.rpm

Red Hat Linux Advanced Workstation 2.1:


Available from Red Hat Network: mailman-2.0.13-6.ia64.rpm

Red Hat Enterprise Linux ES version 2.1:


Available from Red Hat Network: mailman-2.0.13-6.i386.rpm

7. Verification:

MD5 sum                          Package Name
- --------------------------------------------------------------------------

a3e21d6a121d92d2efcef4076faa0e16 2.1AS/en/os/SRPMS/mailman-2.0.13-6.src.rpm
74f69c7c5af328c581d053502e6b2465 2.1AS/en/os/i386/mailman-2.0.13-6.i386.rpm
027475a9d95a44f8a8c263f30b854902 2.1AS/en/os/ia64/mailman-2.0.13-6.ia64.rpm
a3e21d6a121d92d2efcef4076faa0e16 2.1AW/en/os/SRPMS/mailman-2.0.13-6.src.rpm
027475a9d95a44f8a8c263f30b854902 2.1AW/en/os/ia64/mailman-2.0.13-6.ia64.rpm
a3e21d6a121d92d2efcef4076faa0e16 2.1ES/en/os/SRPMS/mailman-2.0.13-6.src.rpm
74f69c7c5af328c581d053502e6b2465 2.1ES/en/os/i386/mailman-2.0.13-6.i386.rpm

These packages are GPG signed by Red Hat for security.  Our key is
available from

You can verify each package with the following command:
    rpm --checksig -v 

If you only wish to verify that each package has not been corrupted or
tampered with, examine only the md5sum with the following command:

8. References:

9. Contact:

The Red Hat security contact is <>.  More contact
details at

Copyright 2004 Red Hat, Inc.

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