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<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE glsa SYSTEM "http://www.gentoo.org/dtd/glsa.dtd">
<glsa id="200702-03">
<title>Snort: Denial of Service</title>
<synopsis>
Snort contains a vulnerability in the rule matching algorithm that could
result in a Denial of Service.
</synopsis>
<product type="ebuild">snort</product>
<announced>2007-02-13</announced>
<revised>2007-02-13: 01</revised>
<bug>161632</bug>
<access>remote</access>
<affected>
<package name="net-analyzer/snort" auto="yes" arch="*">
<unaffected range="ge">2.6.1.2</unaffected>
<vulnerable range="lt">2.6.1.2</vulnerable>
</package>
</affected>
<background>
<p>
Snort is a widely deployed intrusion detection program.
</p>
</background>
<description>
<p>
Randy Smith, Christian Estan and Somesh Jha discovered that the rule
matching algorithm of Snort can be exploited in a way known as a
"backtracking attack" to perform numerous time-consuming operations.
</p>
</description>
<impact type="normal">
<p>
A remote attacker could send specially crafted network packets, which
would result in the cessation of the detections and the consumption of
the CPU resources.
</p>
</impact>
<workaround>
<p>
There is no known workaround at this time.
</p>
</workaround>
<resolution>
<p>
All Snort users should upgrade to the latest version:
</p>
<code>
# emerge --sync
# emerge --ask --oneshot --verbose ">=net-analyzer/snort-2.6.1.2"</code>
</resolution>
<references>
<uri link="https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-6931">CVE-2006-6931</uri>
</references>
<metadata tag="requester" timestamp="2007-02-10T19:01:49Z">
falco
</metadata>
<metadata tag="bugReady" timestamp="2007-02-12T22:41:30Z">
falco
</metadata>
<metadata tag="submitter" timestamp="2007-02-12T23:29:42Z">
falco
</metadata>
</glsa>
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