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<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE glsa SYSTEM "http://www.gentoo.org/dtd/glsa.dtd">
<glsa id="200904-05">
  <title>ntp: Certificate validation error</title>
  <synopsis>
    An error in the OpenSSL certificate chain validation in ntp might allow for
    spoofing attacks.
  </synopsis>
  <product type="ebuild">ntp</product>
  <announced>2009-04-05</announced>
  <revised>2009-04-05: 01</revised>
  <bug>254098</bug>
  <access>remote</access>
  <affected>
    <package name="net-misc/ntp" auto="yes" arch="*">
      <unaffected range="ge">4.2.4_p6</unaffected>
      <vulnerable range="lt">4.2.4_p6</vulnerable>
    </package>
  </affected>
  <background>
    <p>
    ntp contains the client and daemon implementations for the Network Time
    Protocol.
    </p>
  </background>
  <description>
    <p>
    It has been reported that ntp incorrectly checks the return value of
    the EVP_VerifyFinal(), a vulnerability related to CVE-2008-5077 (GLSA
    200902-02).
    </p>
  </description>
  <impact type="normal">
    <p>
    A remote attacker could exploit this vulnerability to spoof arbitrary
    names to conduct Man-In-The-Middle attacks and intercept sensitive
    information.
    </p>
  </impact>
  <workaround>
    <p>
    There is no known workaround at this time.
    </p>
  </workaround>
  <resolution>
    <p>
    All ntp users should upgrade to the latest version:
    </p>
    <code>
    # emerge --sync
    # emerge --ask --oneshot --verbose "&gt;=net-misc/ntp-4.2.4_p6"</code>
  </resolution>
  <references>
    <uri link="https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-5077">CVE-2008-5077</uri>
    <uri link="https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-0021">CVE-2009-0021</uri>
    <uri link="https://www.gentoo.org/security/en/glsa/glsa-200902-02.xml">GLSA 200902-02</uri>
  </references>
  <metadata tag="submitter" timestamp="2009-03-31T11:41:38Z">
    p-y
  </metadata>
  <metadata tag="bugReady" timestamp="2009-03-31T11:41:46Z">
    p-y
  </metadata>
</glsa>