glsa-200809-09.xml


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<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE glsa SYSTEM "http://www.gentoo.org/dtd/glsa.dtd">

<glsa id="200809-09">
  <title>Postfix: Denial of Service</title>
  <synopsis>
    A memory leak in Postfix might allow local users to cause a Denial of
    Service.
  </synopsis>
  <product type="ebuild">postfix</product>
  <announced>September 19, 2008</announced>
  <revised>September 19, 2008: 01</revised>
  <bug>236453</bug>
  <access>local</access>
  <affected>
    <package name="mail-mta/postfix" auto="yes" arch="*">
      <unaffected range="ge">2.4.9</unaffected>
      <unaffected range="ge">2.5.5</unaffected>
      <vulnerable range="lt">2.4.9</vulnerable>
      <vulnerable range="lt">2.5.5</vulnerable>
    </package>
  </affected>
  <background>
    <p>
    Postfix is Wietse Venema's mailer that attempts to be fast, easy to
    administer, and secure, as an alternative to the widely-used Sendmail
    program.
    </p>
  </background>
  <description>
    <p>
    It has been discovered than Postfix leaks an epoll file descriptor when
    executing external commands, e.g. user-controlled $HOME/.forward or
    $HOME/.procmailrc files. NOTE: This vulnerability only concerns Postfix
    instances running on Linux 2.6 kernels.
    </p>
  </description>
  <impact type="normal">
    <p>
    A local attacker could exploit this vulnerability to reduce the
    performance of Postfix, and possibly trigger an assertion, resulting in
    a Denial of Service.
    </p>
  </impact>
  <workaround>
    <p>
    Allow only trusted users to control delivery to non-Postfix commands.
    </p>
  </workaround>
  <resolution>
    <p>
    All Postfix 2.4 users should upgrade to the latest version:
    </p>
    <code>
    # emerge --sync
    # emerge --ask --oneshot --verbose &quot;&gt;=mail-mta/postfix-2.4.9&quot;</code>
    <p>
    All Postfix 2.5 users should upgrade to the latest version:
    </p>
    <code>
    # emerge --sync
    # emerge --ask --oneshot --verbose &quot;&gt;=mail-mta/postfix-2.5.5&quot;</code>
  </resolution>
  <references>
    <uri link="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-3889">CVE-2008-3889</uri>
  </references>
  <metadata tag="requester" timestamp="Wed, 03 Sep 2008 20:58:07 +0000">
    keytoaster
  </metadata>
  <metadata tag="submitter" timestamp="Mon, 08 Sep 2008 18:33:40 +0000">
    p-y
  </metadata>
  <metadata tag="bugReady" timestamp="Mon, 08 Sep 2008 18:33:49 +0000">
    p-y
  </metadata>
</glsa>