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

<glsa id="200512-06">
  <title>Ethereal: Buffer overflow in OSPF protocol dissector</title>
  <synopsis>
    Ethereal is missing bounds checking in the OSPF protocol dissector that
    could lead to abnormal program termination or the execution of arbitrary
    code.
  </synopsis>
  <product type="ebuild">Ethereal</product>
  <announced>December 14, 2005</announced>
  <revised>December 14, 2005: 01</revised>
  <bug>115030</bug>
  <access>remote</access>
  <affected>
    <package name="net-analyzer/ethereal" auto="yes" arch="*">
      <unaffected range="ge">0.10.13-r2</unaffected>
      <vulnerable range="lt">0.10.13-r2</vulnerable>
    </package>
  </affected>
  <background>
    <p>
    Ethereal is a feature-rich network protocol analyzer. It provides
    protocol analyzers for various network flows, including one for Open
    Shortest Path First (OSPF) Interior Gateway Protocol.
    </p>
  </background>
  <description>
    <p>
    iDEFENSE reported a possible overflow due to the lack of bounds
    checking in the dissect_ospf_v3_address_prefix() function, part of the
    OSPF protocol dissector.
    </p>
  </description>
  <impact type="high">
    <p>
    An attacker might be able to craft a malicious network flow that
    would crash Ethereal. It may be possible, though unlikely, to exploit
    this flaw to execute arbitrary code with the permissions of the user
    running Ethereal, which could be the root user.
    </p>
  </impact>
  <workaround>
    <p>
    There is no known workaround at this time.
    </p>
  </workaround>
  <resolution>
    <p>
    All Ethereal users should upgrade to the latest version:
    </p>
    <code>
    # emerge --sync
    # emerge --ask --oneshot --verbose &quot;&gt;=net-analyzer/ethereal-0.10.13-r2&quot;</code>
  </resolution>
  <references>
    <uri link="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2005-3651">CVE-2005-3651</uri>
    <uri link="http://www.idefense.com/application/poi/display?id=349&amp;type=vulnerabilities">iDEFENSE Advisory</uri>
  </references>
  <metadata tag="submitter" timestamp="Mon, 12 Dec 2005 15:18:48 +0000">
    koon
  </metadata>
  <metadata tag="bugReady" timestamp="Wed, 14 Dec 2005 12:23:23 +0000">
    koon
  </metadata>
</glsa>