glsa-200901-10.xml


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

<glsa id="200901-10">
  <title>GnuTLS: Certificate validation error</title>
  <synopsis>
    A certificate validation error in GnuTLS might allow for spoofing attacks.
  </synopsis>
  <product type="ebuild">gnutls</product>
  <announced>January 14, 2009</announced>
  <revised>January 14, 2009: 01</revised>
  <bug>245850</bug>
  <access>remote</access>
  <affected>
    <package name="net-libs/gnutls" auto="yes" arch="*">
      <unaffected range="ge">2.4.1-r2</unaffected>
      <vulnerable range="lt">2.4.1-r2</vulnerable>
    </package>
  </affected>
  <background>
    <p>
    GnuTLS is an open-source implementation of TLS 1.0 and SSL 3.0.
    </p>
  </background>
  <description>
    <p>
    Martin von Gagern reported that the _gnutls_x509_verify_certificate()
    function in lib/x509/verify.c trusts certificate chains in which the
    last certificate is an arbitrary trusted, self-signed certificate.
    </p>
  </description>
  <impact type="normal">
    <p>
    A remote attacker could exploit this vulnerability and 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 GnuTLS users should upgrade to the latest version:
    </p>
    <code>
    # emerge --sync
    # emerge --ask --oneshot --verbose &quot;&gt;=net-libs/gnutls-2.4.1-r2&quot;</code>
  </resolution>
  <references>
    <uri link="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-4989">CVE-2008-4989</uri>
  </references>
  <metadata tag="requester" timestamp="Sun, 30 Nov 2008 19:06:26 +0000">
    keytoaster
  </metadata>
  <metadata tag="submitter" timestamp="Sat, 10 Jan 2009 23:37:58 +0000">
    p-y
  </metadata>
  <metadata tag="bugReady" timestamp="Sat, 10 Jan 2009 23:38:09 +0000">
    p-y
  </metadata>
</glsa>