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<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE glsa SYSTEM "http://www.gentoo.org/dtd/glsa.dtd">
<glsa id="200702-05">
<title>Fail2ban: Denial of Service</title>
<synopsis>
A flaw in Fail2ban may allow remote attackers to deny access to arbitrary
hosts.
</synopsis>
<product type="ebuild">fail2ban</product>
<announced>February 16, 2007</announced>
<revised>February 16, 2007: 01</revised>
<bug>157166</bug>
<access>remote</access>
<affected>
<package name="net-analyzer/fail2ban" auto="yes" arch="*">
<unaffected range="ge">0.6.2</unaffected>
<vulnerable range="lt">0.6.2</vulnerable>
</package>
</affected>
<background>
<p>
Fail2ban monitors log files for failed authentication attempts and can
block hosts responsible for repeated attacks.
</p>
</background>
<description>
<p>
A flaw in the method used to parse log entries allows remote,
unauthenticated attackers to forge authentication attempts from other
hosts.
</p>
</description>
<impact type="normal">
<p>
A remote attacker can add arbitrary hosts to the block list, denying
legitimate users access to a resource.
</p>
</impact>
<workaround>
<p>
There is no known workaround at this time.
</p>
</workaround>
<resolution>
<p>
All Fail2ban users should upgrade to the latest version:
</p>
<code>
# emerge --sync
# emerge --ask --oneshot --verbose ">=net-analyzer/fail2ban-0.6.2"</code>
</resolution>
<references>
<uri link="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-6302">CVE-2006-6302</uri>
</references>
<metadata tag="requester" timestamp="Mon, 12 Feb 2007 22:35:11 +0000">
falco
</metadata>
<metadata tag="bugReady" timestamp="Mon, 12 Feb 2007 22:42:08 +0000">
falco
</metadata>
<metadata tag="submitter" timestamp="Mon, 12 Feb 2007 22:56:35 +0000">
taviso
</metadata>
</glsa>
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