metadata/glsa/glsa-200801-16.xml


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

<glsa id="200801-16">
  <title>MaraDNS: CNAME Denial of Service</title>
  <synopsis>
    MaraDNS is prone to a Denial of Service vulnerability impacting CNAME
    resolution.
  </synopsis>
  <product type="ebuild">maradns</product>
  <announced>January 29, 2008</announced>
  <revised>January 29, 2008: 01</revised>
  <bug>204351</bug>
  <access>remote</access>
  <affected>
    <package name="net-dns/maradns" auto="yes" arch="*">
      <unaffected range="ge">1.2.12.08</unaffected>
      <vulnerable range="lt">1.2.12.08</vulnerable>
    </package>
  </affected>
  <background>
    <p>
    MaraDNS is a package that implements the Domain Name Service (DNS) with
    resolver and caching ability.
    </p>
  </background>
  <description>
    <p>
    Michael Krieger reported that a specially crafted DNS could prevent an
    authoritative canonical name (CNAME) record from being resolved because
    of an "improper rotation of resource records".
    </p>
  </description>
  <impact type="normal">
    <p>
    A remote attacker could send specially crafted DNS packets to a
    vulnerable server, making it unable to resolve CNAME records.
    </p>
  </impact>
  <workaround>
    <p>
    Add "max_ar_chain = 2" to the "marac" configuration file.
    </p>
  </workaround>
  <resolution>
    <p>
    All MaraDNS users should upgrade to the latest version:
    </p>
    <code>
    # emerge --sync
    # emerge --ask --oneshot --verbose &quot;&gt;=net-dns/maradns-1.2.12.09&quot;</code>
  </resolution>
  <references>
    <uri link="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-0061">CVE-2008-0061</uri>
  </references>
  <metadata tag="requester" timestamp="Sun, 27 Jan 2008 19:19:02 +0000">
    rbu
  </metadata>
  <metadata tag="submitter" timestamp="Mon, 28 Jan 2008 17:41:20 +0000">
    falco
  </metadata>
  <metadata tag="bugReady" timestamp="Mon, 28 Jan 2008 18:03:45 +0000">
    falco
  </metadata>
</glsa>