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<?xml version="1.0" encoding="utf-8"?>
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<!DOCTYPE glsa SYSTEM "http://www.gentoo.org/dtd/glsa.dtd">
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<glsa id="200505-06">
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<title>TCPDump: Decoding routines Denial of Service vulnerability</title>
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<synopsis>
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A flaw in the decoding of network packets renders TCPDump vulnerable to a
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remote Denial of Service attack.
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</synopsis>
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<product type="ebuild">tcpdump</product>
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<announced>2005-05-09</announced>
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<revised count="02">2005-06-12</revised>
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<bug>90541</bug>
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<bug>95349</bug>
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<access>remote</access>
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<affected>
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<package name="net-analyzer/tcpdump" auto="yes" arch="*">
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<unaffected range="ge">3.8.3-r3</unaffected>
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<vulnerable range="lt">3.8.3-r3</vulnerable>
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</package>
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</affected>
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<background>
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<p>
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TCPDump is a tool for network monitoring and data acquisition.
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</p>
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</background>
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<description>
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<p>
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TCPDump improperly handles and decodes ISIS (CAN-2005-1278), BGP
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(CAN-2005-1267, CAN-2005-1279), LDP (CAN-2005-1279) and RSVP
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(CAN-2005-1280) packets. TCPDump might loop endlessly after receiving
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malformed packets.
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</p>
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</description>
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<impact type="normal">
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<p>
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A malicious remote attacker can exploit the decoding issues for a
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Denial of Service attack by sending specially crafted packets, possibly
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causing TCPDump to loop endlessly.
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</p>
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</impact>
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<workaround>
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<p>
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There is no known workaround at this time.
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</p>
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</workaround>
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<resolution>
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<p>
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All TCPDump users should upgrade to the latest available version:
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</p>
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<code>
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# emerge --sync
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# emerge --ask --oneshot --verbose ">=net-analyzer/tcpdump-3.8.3-r3"</code>
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</resolution>
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<references>
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<uri link="https://www.cve.mitre.org/cgi-bin/cvename.cgi?name=2005-1267">CAN-2005-1267</uri>
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<uri link="https://www.cve.mitre.org/cgi-bin/cvename.cgi?name=2005-1278">CAN-2005-1278</uri>
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<uri link="https://www.cve.mitre.org/cgi-bin/cvename.cgi?name=2005-1279">CAN-2005-1279</uri>
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<uri link="https://www.cve.mitre.org/cgi-bin/cvename.cgi?name=2005-1280">CAN-2005-1280</uri>
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</references>
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<metadata tag="requester" timestamp="2005-05-08T15:18:02Z">
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jaervosz
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</metadata>
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<metadata tag="submitter" timestamp="2005-05-08T15:56:20Z">
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DerCorny
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</metadata>
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<metadata tag="bugReady" timestamp="2005-05-09T19:22:22Z">
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jaervosz
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</metadata>
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</glsa>
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