glsa-200404-09.xml


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

<glsa id="200404-09">
  <title>Cross-realm trust vulnerability in Heimdal</title>
  <synopsis>
    Heimdal contains cross-realm vulnerability allowing someone with control
    over a realm to impersonate anyone in the cross-realm trust path.
  </synopsis>
  <product type="ebuild">heimdal</product>
  <announced>April 09, 2004</announced>
  <revised>April 09, 2004: 01</revised>
  <bug>46590</bug>
  <access>local</access>
  <affected>
    <package name="app-crypt/heimdal" auto="yes" arch="*">
      <unaffected range="ge">0.6.1</unaffected>
      <vulnerable range="le">0.6.0</vulnerable>
    </package>
  </affected>
  <background>
    <p>
    Heimdal is a free implementation of Kerberos 5.
    </p>
  </background>
  <description>
    <p>
    Heimdal does not properly perform certain consistency checks for
    cross-realm requests, which allows remote attackers with control of a realm
    to impersonate others in the cross-realm trust path.
    </p>
  </description>
  <impact type="normal">
    <p>
    Remote attackers with control of a realm may be able to impersonate other
    users in the cross-realm trust path.
    </p>
  </impact>
  <workaround>
    <p>
    A workaround is not currently known for this issue. All users are advised
    to upgrade to the latest version of the affected package.
    </p>
  </workaround>
  <resolution>
    <p>
    Heimdal users should upgrade to version 0.6.1 or later:
    </p>
    <code>
    # emerge sync
    
    # emerge -pv ">=app-crypt/heimdal-0.6.1"
    # emerge ">=app-crypt/heimdal-0.6.1"</code>
  </resolution>
  <references>
    <uri link="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0371">CVE</uri>
  </references>
  <metadata tag="submitter">klieber</metadata>
</glsa>