From: secure@conectiva.com.br
To: conectiva-updates@papaleguas.conectiva.com.br, lwn@lwn.net,
bugtraq@securityfocus.com, security-alerts@linuxsecurity.com
Subject: [CLA-2002:454] Conectiva Linux Security Announcement - exim
Date: Fri, 18 Jan 2002 14:18:16 -0200
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CONECTIVA LINUX SECURITY ANNOUNCEMENT
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PACKAGE : exim
SUMMARY : Remote command execution
DATE : 2002-01-18 14:17:00
ID : CLA-2002:454
RELEVANT
RELEASES : 6.0, 7.0
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DESCRIPTION
Exim is a popular email server (MTA).
Versions prior do 3.34 have a vulnerability[1] which can be used by a
remote attacker to execute arbitrary commands on the server under
certain conditions.
The default configuration doesn't trigger this vulnerability.
According to Philip Hazel[2] in a post to the exim-announce mailing
list, the problem only exists when there is a pipe transport being
used (which is common with anti-virus software, for example) where
the local part of the address isn't checked. In this case, if there
is a pipe ("|") in that local part, commands encoded in it will be
executed by Exim.
SOLUTION
It is recommended that all Exim users upgrade their packages.
REFERENCES
1. http://www.securityfocus.com/bid/3728
2. http://www.exim.org/pipermail/exim-announce/2001q4/000048.html
DIRECT DOWNLOAD LINKS TO THE UPDATED PACKAGES
ftp://atualizacoes.conectiva.com.br/6.0/SRPMS/exim-3.16-4U60_2cl.src.rpm
ftp://atualizacoes.conectiva.com.br/6.0/RPMS/exim-3.16-4U60_2cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/6.0/RPMS/exim-doc-3.16-4U60_2cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/6.0/RPMS/exim-mon-3.16-4U60_2cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/7.0/SRPMS/exim-3.22-9U70_1cl.src.rpm
ftp://atualizacoes.conectiva.com.br/7.0/RPMS/exim-3.22-9U70_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/7.0/RPMS/exim-config-samples-3.22-9U70_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/7.0/RPMS/exim-doc-3.22-9U70_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/7.0/RPMS/exim-mon-3.22-9U70_1cl.i386.rpm
ADDITIONAL INSTRUCTIONS
Users of Conectiva Linux version 6.0 or higher may use apt to perform
upgrades of RPM packages:
- add the following line to /etc/apt/sources.list if it is not there yet
(you may also use linuxconf to do this):
rpm [cncbr] ftp://atualizacoes.conectiva.com.br 6.0/conectiva updates
(replace 6.0 with the correct version number if you are not running CL6.0)
- 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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