<?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>2008-01-29</announced> <revised count="01">2008-01-29</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 ">=net-dns/maradns-1.2.12.09"</code> </resolution> <references> <uri link="https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-0061">CVE-2008-0061</uri> </references> <metadata tag="requester" timestamp="2008-01-27T19:19:02Z"> rbu </metadata> <metadata tag="submitter" timestamp="2008-01-28T17:41:20Z"> falco </metadata> <metadata tag="bugReady" timestamp="2008-01-28T18:03:45Z"> falco </metadata> </glsa>