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<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE glsa SYSTEM "http://www.gentoo.org/dtd/glsa.dtd">
<glsa id="200801-16">
<title>MaraDNS: CNAME Denial of Service</title>
<synopsis>
MaraDNS is prone to a Denial of Service vulnerability impacting CNAME
resolution.
</synopsis>
<product type="ebuild">maradns</product>
<announced>January 29, 2008</announced>
<revised>January 29, 2008: 01</revised>
<bug>204351</bug>
<access>remote</access>
<affected>
<package name="net-dns/maradns" auto="yes" arch="*">
<unaffected range="ge">1.2.12.08</unaffected>
<vulnerable range="lt">1.2.12.08</vulnerable>
</package>
</affected>
<background>
<p>
MaraDNS is a package that implements the Domain Name Service (DNS) with
resolver and caching ability.
</p>
</background>
<description>
<p>
Michael Krieger reported that a specially crafted DNS could prevent an
authoritative canonical name (CNAME) record from being resolved because
of an "improper rotation of resource records".
</p>
</description>
<impact type="normal">
<p>
A remote attacker could send specially crafted DNS packets to a
vulnerable server, making it unable to resolve CNAME records.
</p>
</impact>
<workaround>
<p>
Add "max_ar_chain = 2" to the "marac" configuration file.
</p>
</workaround>
<resolution>
<p>
All MaraDNS users should upgrade to the latest version:
</p>
<code>
# emerge --sync
# emerge --ask --oneshot --verbose &quot;&gt;=net-dns/maradns-1.2.12.09&quot;</code>
</resolution>
<references>
<uri link="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-0061">CVE-2008-0061</uri>
</references>
<metadata tag="requester" timestamp="Sun, 27 Jan 2008 19:19:02 +0000">
rbu
</metadata>
<metadata tag="submitter" timestamp="Mon, 28 Jan 2008 17:41:20 +0000">
falco
</metadata>
<metadata tag="bugReady" timestamp="Mon, 28 Jan 2008 18:03:45 +0000">
falco
</metadata>
</glsa>