glsa-200311-04.xml


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<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE glsa SYSTEM "http://www.gentoo.org/dtd/glsa.dtd">
<glsa id="200311-04">
  <title>FreeRADIUS: heap exploit and NULL pointer dereference vulnerability</title>
  <synopsis>
    FreeRADIUS is vulnerable to a heap exploit and a NULL pointer dereference
    vulnerability.
  </synopsis>
  <product type="ebuild">FreeRADIUS</product>
  <announced>2003-11-23</announced>
  <revised count="01">2003-11-23</revised>
  <bug>33989</bug>
  <access>remote</access>
  <affected>
    <package name="net-dialup/freeradius" auto="yes" arch="*">
      <unaffected range="ge">0.9.3</unaffected>
      <vulnerable range="le">0.9.2</vulnerable>
    </package>
  </affected>
  <background>
    <p>
    FreeRADIUS is a popular open source RADIUS server.
    </p>
  </background>
  <description>
    <p>
    FreeRADIUS versions below 0.9.3 are vulnerable to a heap exploit, however,
    the attack code must be in the form of a valid RADIUS packet which limits
    the possible exploits.
    </p>
    <p>
    Also corrected in the 0.9.3 release is another vulnerability which causes
    the RADIUS server to de-reference a NULL pointer and crash when an
    Access-Request packet with a Tunnel-Password is received.
    </p>
  </description>
  <impact type="normal">
    <p>
    A remote attacker could craft a RADIUS packet which would cause the RADIUS
    server to crash, or could possibly overflow the heap resulting in a system
    compromise.
    </p>
  </impact>
  <workaround>
    <p>
    There is no known workaround at this time.
    </p>
  </workaround>
  <resolution>
    <p>
    Users are encouraged to perform an 'emerge sync' and upgrade the package to
    the latest available version - 0.9.3 is available in portage and is marked
    as stable.
    </p>
    <code>
    # emerge sync
    # emerge -pv '&gt;=net-dialup/freeradius-0.9.3'
    # emerge '&gt;=net-dialup/freeradius-0.9.3'
    # emerge clean</code>
  </resolution>
  <references>
    <uri link="http://www.securitytracker.com/alerts/2003/Nov/1008263.html">SecurityTracker.com Security Alert</uri>
  </references>
</glsa>