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Home » Hacking News » Conectiva CLA-2003:735: exim remote buffer overflow

Conectiva CLA-2003:735: exim remote buffer overflow

by Nikola Strahija on September 5th, 2003 A remote heap buffer overflow vulnerability has been reported in the Exim server. Carefully constructed EHLO/HELO messages can cause a buffer overflow. By the time this message is processed, Exim is no longer running with administrator privileges. At this time, this vulnerability is believed to be difficult to exploit.


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Hash: SHA1

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CONECTIVA LINUX SECURITY ANNOUNCEMENT
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PACKAGE : exim
SUMMARY : Remote buffer overflow vulnerability
DATE : 2003-09-05 15:11:00
ID : CLA-2003:735
RELEVANT
RELEASES : 7.0, 8, 9

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DESCRIPTION
Exim[1] is a popular email server (MTA).

A remote heap buffer overflow vulnerability[2] has been reported[3]
in the Exim server. Carefully constructed EHLO/HELO messages can
cause a buffer overflow. By the time this message is processed, Exim
is no longer running with administrator privileges. At this time,
this vulnerability is believed to be difficult to exploit.

Exim is not installed nor started by default on Conectiva Linux.


SOLUTION
It is recommended that all Exim users upgrade their packages. After
the upgrade, Exim will be automatically restarted if it was already
running.


REFERENCES
1. http://www.exim.org/
2. http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2003-0743
3. http://www.exim.org/pipermail/exim-announce/2003q3/000094.html


UPDATED PACKAGES
ftp://atualizacoes.conectiva.com.br/7.0/SRPMS/exim-3.22-9U70_2cl.src.rpm
ftp://atualizacoes.conectiva.com.br/7.0/RPMS/exim-3.22-9U70_2cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/7.0/RPMS/exim-config-samples-3.22-9U70_2cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/7.0/RPMS/exim-doc-3.22-9U70_2cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/7.0/RPMS/exim-mon-3.22-9U70_2cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/8/SRPMS/exim-3.33-4U80_1cl.src.rpm
ftp://atualizacoes.conectiva.com.br/8/RPMS/exim-3.33-4U80_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/8/RPMS/exim-config-samples-3.33-4U80_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/8/RPMS/exim-doc-3.33-4U80_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/8/RPMS/exim-mon-3.33-4U80_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/9/SRPMS/exim-3.36-28816U90_1cl.src.rpm
ftp://atualizacoes.conectiva.com.br/9/RPMS/exim-3.36-28816U90_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/9/RPMS/exim-config-samples-3.36-28816U90_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/9/RPMS/exim-doc-3.36-28816U90_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/9/RPMS/exim-mon-3.36-28816U90_1cl.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 (c) 2003 Conectiva Inc.
http://www.conectiva.com

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subscribe: [email protected]
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