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Date:      Fri, 10 Dec 2010 14:10:11 +0300 (MSK)
From:      Eygene Ryabinkin <rea@freebsd.org>
To:        FreeBSD-gnats-submit@freebsd.org
Subject:   ports/152983: security/vuxml: add entry for Exim's CVE-2010-4345
Message-ID:  <20101210111011.4DA3FDA81F@void.codelabs.ru>
Resent-Message-ID: <201012101130.oBABUG3b084635@freefall.freebsd.org>
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>Number:         152983
>Category:       ports
>Synopsis:       security/vuxml: add entry for Exim's CVE-2010-4345
>Confidential:   no
>Severity:       serious
>Priority:       high
>Responsible:    freebsd-ports-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Fri Dec 10 11:30:16 UTC 2010
>Closed-Date:
>Last-Modified:
>Originator:     Eygene Ryabinkin
>Release:        FreeBSD 9.0-CURRENT amd64
>Organization:
Code Labs
>Environment:

System: FreeBSD 9.0-CURRENT amd64

>Description:

There is a local privilege escalation from Exim's user to root: [1]

>How-To-Repeat:

[1] https://bugzilla.redhat.com/show_bug.cgi?id=661756#c3

One can create e.conf with contents like
{{{
spool_directory = ${run{/usr/bin/touch /tmp/testfile}}
}}}
run Exim as 'exim -Ce.conf -q' under Exim's own user.
/tmp/testfile will be owned by root.

>Fix:

There is a patch for Exim that is still discussed,
  http://lists.exim.org/lurker/message/20101209.172233.abcba158.en.html

The following VuXML entry should be evaluated and added:
--- vuln.xml begins here ---
  <vuln vid="e4fcf020-0447-11e0-becc-0022156e8794">
    <topic>Exim -- local privilege escalation</topic>
    <affects>
      <package>
        <name>exim</name>
        <range><le>4.72</le></range>
      </package>
    </affects>
    <description>
      <body xmlns="http://www.w3.org/1999/xhtml">;
        <p>David Woodhouse reports:</p>
        <blockquote
          cite="https://bugzilla.redhat.com/show_bug.cgi?id=661756#c3">;
          <p>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.</p>
        </blockquote>
      </body>
    </description>
    <references>
      <cvename>CVE-2010-4345</cvename>
      <url>https://bugzilla.redhat.com/show_bug.cgi?id=661756#c3</url>;
      <url>http://www.exim.org/lurker/message/20101209.022730.dbb6732d.en.html</url>;
    </references>
    <dates>
      <discovery>2010-12-10</discovery>
      <entry>TODAY</entry>
    </dates>
  </vuln>
--- vuln.xml ends here ---
It passes 'make validate'.
>Release-Note:
>Audit-Trail:
>Unformatted:

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