glsa-200702-06.xml


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<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE glsa SYSTEM "http://www.gentoo.org/dtd/glsa.dtd">
<glsa id="200702-06">
  <title>BIND: Denial of Service</title>
  <synopsis>
    ISC BIND contains two vulnerabilities allowing a Denial of Service under
    certain conditions.
  </synopsis>
  <product type="ebuild">bind</product>
  <announced>2007-02-17</announced>
  <revised count="01">2007-02-17</revised>
  <bug>163692</bug>
  <access>remote</access>
  <affected>
    <package name="net-dns/bind" auto="yes" arch="*">
      <unaffected range="ge">9.3.4</unaffected>
      <unaffected range="rge">9.2.8</unaffected>
      <vulnerable range="lt">9.3.4</vulnerable>
    </package>
  </affected>
  <background>
    <p>
    ISC BIND is the Internet Systems Consortium implementation of the
    Domain Name System (DNS) protocol.
    </p>
  </background>
  <description>
    <p>
    An unspecified improper usage of an already freed context has been
    reported. Additionally, an assertion error could be triggered in the
    DNSSEC validation of some responses to type ANY queries with multiple
    RRsets.
    </p>
  </description>
  <impact type="normal">
    <p>
    A remote attacker could crash the server through unspecified vectors
    or, if DNSSEC validation is enabled, by sending certain crafted ANY
    queries.
    </p>
  </impact>
  <workaround>
    <p>
    There is no known workaround at this time for the first issue. The
    DNSSEC validation Denial of Service can be prevented by disabling
    DNSSEC validation until the upgrade to a fixed version. Note that
    DNSSEC validation is disabled on a default configuration.
    </p>
  </workaround>
  <resolution>
    <p>
    All ISC BIND 9.3 users should upgrade to the latest version:
    </p>
    <code>
    # emerge --sync
    # emerge --ask --oneshot --verbose "&gt;=net-dns/bind-9.3.4"</code>
    <p>
    All ISC BIND 9.2 users should upgrade to the latest version:
    </p>
    <code>
    # emerge --sync
    # emerge --ask --oneshot --verbose "&gt;=net-dns/bind-9.2.8"</code>
  </resolution>
  <references>
    <uri link="https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-0493">CVE-2007-0493</uri>
    <uri link="https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-0494">CVE-2007-0494</uri>
  </references>
  <metadata tag="requester" timestamp="2007-02-16T09:07:21Z">
    falco
  </metadata>
  <metadata tag="submitter" timestamp="2007-02-16T17:39:52Z">
    falco
  </metadata>
  <metadata tag="bugReady" timestamp="2007-02-17T15:53:00Z">
    falco
  </metadata>
</glsa>