[CLA-2003:614] Conectiva Security Announcement - sendmail

[Conectiva Updates <secure () conectiva com br>]

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CONECTIVA LINUX SECURITY ANNOUNCEMENT 
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PACKAGE   : sendmail
SUMMARY   : Buffer overflow vulnerability
DATE      : 2003-04-04 15:10:00
ID        : CLA-2003:614
RELEVANT
RELEASES  : 6.0, 7.0, 8

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DESCRIPTION
 Sendmail[1] is a widely used Mail Transfer Agent (MTA).
 
 Michal Zalewski reported[6] a remote vulnerability[5] in sendmail
 versions 8.12.8 and below. The vulnerability lies in the address
 parser which performs insufficient bounds checking in certain
 conditions due to a char to int conversion.
 
 It is believed to be possible for remote attackers to cause a Denial
 of Service condition and to even execute arbitrary commands with the
 same permissions under which the sendmail daemon runs, which is
 root.
 
 The sendmail authors have released a new version[2], 8.12.9, which
 fixes this vulnerability. They have also made available patches[3]
 for older versions, which the packages provided via this announcement
 contain.
 
 Starting with Conectiva Linux 7.0, sendmail is no longer the default
 mail server and has been replaced with Postfix. But sendmail is still
 shipped in all Conectiva Linux versions.


SOLUTION
 All sendmail users should upgrade immediately. If the service is
 already active, it should be restarted after the upgrade in order to
 close the vulnerability. To do so, execute the following command as
 root:
 
 /sbin/service sendmail restart
 
 
 REFERENCES
 1. http://www.sendmail.org/
 2. http://www.sendmail.org/8.12.9.html
 3. http://www.sendmail.org/patchps.html
 4. http://www.cert.org/advisories/CA-2003-12.html
 5. http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2003-0161
 6. http://marc.theaimsgroup.com/?l=bugtraq&m=104897487512238&w=2


UPDATED PACKAGES
ftp://atualizacoes.conectiva.com.br/6.0/SRPMS/sendmail-8.11.6-1U60_4cl.src.rpm
ftp://atualizacoes.conectiva.com.br/6.0/RPMS/sendmail-8.11.6-1U60_4cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/6.0/RPMS/sendmail-cf-8.11.6-1U60_4cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/6.0/RPMS/sendmail-doc-8.11.6-1U60_4cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/7.0/SRPMS/sendmail-8.11.6-1U70_4cl.src.rpm
ftp://atualizacoes.conectiva.com.br/7.0/RPMS/sendmail-8.11.6-1U70_4cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/7.0/RPMS/sendmail-cf-8.11.6-1U70_4cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/7.0/RPMS/sendmail-doc-8.11.6-1U70_4cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/8/SRPMS/sendmail-8.11.6-2U80_4cl.src.rpm
ftp://atualizacoes.conectiva.com.br/8/RPMS/sendmail-8.11.6-2U80_4cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/8/RPMS/sendmail-cf-8.11.6-2U80_4cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/8/RPMS/sendmail-doc-8.11.6-2U80_4cl.i386.rpm


ADDITIONAL INSTRUCTIONS
 The apt tool can be used to perform RPM packages upgrades:

 - run:                 apt-get update
 - after that, execute: apt-get upgrade

 Detailed instructions reagarding the use of apt and upgrade examples 
 can be found at http://distro.conectiva.com.br/atualizacoes/#apt?idioma=en

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All packages are signed with Conectiva's GPG key. The key and instructions
on how to import it can be found at 
http://distro.conectiva.com.br/seguranca/chave/?idioma=en
Instructions on how to check the signatures of the RPM packages can be
found at http://distro.conectiva.com.br/seguranca/politica/?idioma=en

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All our advisories and generic update instructions can be viewed at
http://distro.conectiva.com.br/atualizacoes/?idioma=en

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Copyright 2003 (c) Conectiva Inc.
http://www.conectiva.com

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