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<?xml version="1.0" encoding="utf-8"?>
<!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>