glsa-200810-03.xml


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<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE glsa SYSTEM "http://www.gentoo.org/dtd/glsa.dtd">
<glsa id="200810-03">
  <title>libspf2: DNS response buffer overflow</title>
  <synopsis>
    A memory management error in libspf2 might allow for remote execution of
    arbitrary code.
  </synopsis>
  <product type="ebuild">libspf2</product>
  <announced>2008-10-30</announced>
  <revised>2008-10-30: 01</revised>
  <bug>242254</bug>
  <access>remote</access>
  <affected>
    <package name="mail-filter/libspf2" auto="yes" arch="*">
      <unaffected range="ge">1.2.8</unaffected>
      <vulnerable range="lt">1.2.8</vulnerable>
    </package>
  </affected>
  <background>
    <p>
    libspf2 is a library that implements the Sender Policy Framework,
    allowing mail transfer agents to make sure that an email is authorized
    by the domain name that it is coming from. Currently, only the exim MTA
    uses libspf2 in Gentoo.
    </p>
  </background>
  <description>
    <p>
    libspf2 uses a fixed-length buffer to receive DNS responses and does
    not properly check the length of TXT records, leading to buffer
    overflows.
    </p>
  </description>
  <impact type="high">
    <p>
    A remote attacker could store a specially crafted DNS entry and entice
    a user or automated system using libspf2 to lookup that SPF entry (e.g.
    by sending an email to the MTA), possibly allowing for the execution of
    arbitrary code.
    </p>
  </impact>
  <workaround>
    <p>
    There is no known workaround at this time.
    </p>
  </workaround>
  <resolution>
    <p>
    All libspf2 users should upgrade to the latest version:
    </p>
    <code>
    # emerge --sync
    # emerge --ask --oneshot --verbose "&gt;=mail-filter/libspf2-1.2.8"</code>
  </resolution>
  <references>
    <uri link="https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-2469">CVE-2008-2469</uri>
  </references>
  <metadata tag="requester" timestamp="2008-10-18T16:51:58Z">
    rbu
  </metadata>
  <metadata tag="submitter" timestamp="2008-10-19T19:27:11Z">
    rbu
  </metadata>
  <metadata tag="bugReady" timestamp="2008-10-23T13:43:28Z">
    rbu
  </metadata>
</glsa>