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Date: Fri, 10 Dec 2010 09:48:20 +0000 (GMT)
From: Mark J Cox <mjc@...hat.com>
To: oss-security@...ts.openwall.com
cc: "Steven M. Christey" <coley@...us.mitre.org>
Subject: Exim remote root

A number of sites are reporting an exim remote root based from this
report:
http://www.exim.org/lurker/message/20101207.215955.bb32d4f2.en.html

Quoting David Woodhouse: "There are two bugs here. First a remote exploit 
where the attacker somehow tricks Exim into evaluating data it shouldn't, 
and honouring a ${run {/bin/sh...}} directive which ends up giving the 
attacker a shell (as user 'exim').

Secondly a privilege escalation where the trusted 'exim' user is able to 
tell Exim to use arbitrary config files, in which further ${run ...} 
commands will be invoked as root."
https://bugzilla.redhat.com/show_bug.cgi?id=661756#c3

The remote vulnerability is still being investigated.  However it is worth 
allocating the CVE names now to help with co-ordination.

CVE-2010-4344 exim vuln that allows remote code execution as 'exim'
CVE-2010-4345 exim vuln that allows privilege escalation 'exim' to root

A patch for CVE-2010-4345:
http://lists.exim.org/lurker/message/20101209.172233.abcba158.en.html

Thanks, Mark
--
Mark J Cox / Red Hat Security Response

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