glsa-200804-22.xml


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

<glsa id="200804-22">
  <title>PowerDNS Recursor: DNS Cache Poisoning</title>
  <synopsis>
    Use of insufficient randomness in PowerDNS Recursor might lead to DNS cache
    poisoning.
  </synopsis>
  <product type="ebuild">pdns-recursor</product>
  <announced>April 18, 2008</announced>
  <revised>August 21, 2008: 03</revised>
  <bug>215567</bug>
  <bug>231335</bug>
  <access>remote</access>
  <affected>
    <package name="net-dns/pdns-recursor" auto="yes" arch="*">
      <unaffected range="ge">3.1.6</unaffected>
      <vulnerable range="lt">3.1.6</vulnerable>
    </package>
  </affected>
  <background>
    <p>
    The PowerDNS Recursor is an advanced recursing nameserver.
    </p>
  </background>
  <description>
    <p>
    Amit Klein of Trusteer reported that insufficient randomness is used to
    calculate the TRXID values and the UDP source port numbers
    (CVE-2008-1637). Thomas Biege of SUSE pointed out that a prior fix to
    resolve this issue was incomplete, as it did not always enable the
    stronger random number generator for source port selection
    (CVE-2008-3217).
    </p>
  </description>
  <impact type="normal">
    <p>
    A remote attacker could send malicious answers to insert arbitrary DNS
    data into the cache. These attacks would in turn help an attacker to
    perform man-in-the-middle and site impersonation attacks.
    </p>
  </impact>
  <workaround>
    <p>
    There is no known workaround at this time.
    </p>
  </workaround>
  <resolution>
    <p>
    All PowerDNS Recursor users should upgrade to the latest version:
    </p>
    <code>
    # emerge --sync
    # emerge --ask --oneshot --verbose &quot;&gt;=net-dns/pdns-recursor-3.1.6&quot;</code>
  </resolution>
  <references>
    <uri link="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-1637">CVE-2008-1637</uri>
    <uri link="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-3217">CVE-2008-3217</uri>
  </references>
  <metadata tag="requester" timestamp="Thu, 17 Apr 2008 20:12:08 +0000">
    keytoaster
  </metadata>
  <metadata tag="submitter" timestamp="Fri, 18 Apr 2008 01:27:35 +0000">
    rbu
  </metadata>
  <metadata tag="bugReady" timestamp="Fri, 18 Apr 2008 01:27:43 +0000">
    rbu
  </metadata>
</glsa>