glsa-200505-06.xml


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

<glsa id="200505-06">
  <title>TCPDump: Decoding routines Denial of Service vulnerability</title>
  <synopsis>
    A flaw in the decoding of network packets renders TCPDump vulnerable to a
    remote Denial of Service attack.
  </synopsis>
  <product type="ebuild">tcpdump</product>
  <announced>May 09, 2005</announced>
  <revised>June 12, 2005: 02</revised>
  <bug>90541</bug>
  <bug>95349</bug>
  <access>remote</access>
  <affected>
    <package name="net-analyzer/tcpdump" auto="yes" arch="*">
      <unaffected range="ge">3.8.3-r3</unaffected>
      <vulnerable range="lt">3.8.3-r3</vulnerable>
    </package>
  </affected>
  <background>
    <p>
    TCPDump is a tool for network monitoring and data acquisition.
    </p>
  </background>
  <description>
    <p>
    TCPDump improperly handles and decodes ISIS (CAN-2005-1278), BGP
    (CAN-2005-1267, CAN-2005-1279), LDP (CAN-2005-1279) and RSVP
    (CAN-2005-1280) packets. TCPDump might loop endlessly after receiving
    malformed packets.
    </p>
  </description>
  <impact type="normal">
    <p>
    A malicious remote attacker can exploit the decoding issues for a
    Denial of Service attack by sending specially crafted packets, possibly
    causing TCPDump to loop endlessly.
    </p>
  </impact>
  <workaround>
    <p>
    There is no known workaround at this time.
    </p>
  </workaround>
  <resolution>
    <p>
    All TCPDump users should upgrade to the latest available version:
    </p>
    <code>
    # emerge --sync
    # emerge --ask --oneshot --verbose &quot;&gt;=net-analyzer/tcpdump-3.8.3-r3&quot;</code>
  </resolution>
  <references>
    <uri link="http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=2005-1267">CAN-2005-1267</uri>
    <uri link="http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=2005-1278">CAN-2005-1278</uri>
    <uri link="http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=2005-1279">CAN-2005-1279</uri>
    <uri link="http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=2005-1280">CAN-2005-1280</uri>
  </references>
  <metadata tag="requester" timestamp="Sun, 08 May 2005 15:18:02 +0000">
    jaervosz
  </metadata>
  <metadata tag="submitter" timestamp="Sun, 08 May 2005 15:56:20 +0000">
    DerCorny
  </metadata>
  <metadata tag="bugReady" timestamp="Mon, 09 May 2005 19:22:22 +0000">
    jaervosz
  </metadata>
</glsa>