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RedHat: 'postfix' potential denial of service Print E-mail
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Posted by LinuxSecurity.com Team   
RedHat Linux Updated postfix packages are now availble that will fix a possible denialof service attack.

---------------------------------------------------------------------
                   Red Hat, Inc. Red Hat Security Advisory

Synopsis:          Updated postfix packages are available
Advisory ID:       RHSA-2001:156-05
Issue date:        2001-11-15
Updated on:        2001-11-27
Product:           Red Hat Powertools
Keywords:          postfix session log memory exhaustion denial of service
Cross references:  
Obsoletes:         
---------------------------------------------------------------------

1. Topic:

Updated postfix packages are now availble that will fix a possible denial
of service attack.

2. Relevant releases/architectures:

Red Hat Powertools 7.1 - alpha, i386

3. Problem description:

A malicious user could get postfix to exhaust a machine's memory by 
abusing its session cache which could result in a denial of service attack.
The updated postfix packages will fix these potential problems.

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:

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.Red Hat.com/bugzilla for more info):



6. RPMs required:

Red Hat Powertools 7.1:

SRPMS: 
ftp://updates.Red Hat.com/7.1/en/powertools/SRPMS/postfix-20011125-1SASL.src.rpm

alpha: 
ftp://updates.Red Hat.com/7.1/en/powertools/alpha/postfix-20011125-1SASL.alpha.rpm

i386: 
ftp://updates.Red Hat.com/7.1/en/powertools/i386/postfix-20011125-1SASL.i386.rpm



7. Verification:

MD5 sum                          Package Name
--------------------------------------------------------------------------
3f226c17cd8a8955826c3aced3f77947 7.1/en/powertools/SRPMS/postfix-20011125-1SASL.src.rpm
ba0706ce0d6e6c453a8e1afcab248eac 7.1/en/powertools/alpha/postfix-20011125-1SASL.alpha.rpm
60402b08bd489052146eec437838a829 7.1/en/powertools/i386/postfix-20011125-1SASL.i386.rpm
 

These packages are GPG signed by Red Hat, Inc. for security.  Our key
is available at:
     http://www.Red Hat.com/about/contact/pgpkey.html

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

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

8. References:




Copyright(c) 2000, 2001 Red Hat, Inc.

 
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