<?xml version="1.0" encoding="utf-8"?> <!DOCTYPE glsa SYSTEM "http://www.gentoo.org/dtd/glsa.dtd"> <glsa id="200901-11"> <title>Avahi: Denial of service</title> <synopsis> A Denial of Service vulnerability has been discovered in Avahi. </synopsis> <product type="ebuild">avahi</product> <announced>2009-01-14</announced> <revised count="01">2009-01-14</revised> <bug>250913</bug> <access>remote</access> <affected> <package name="net-dns/avahi" auto="yes" arch="*"> <unaffected range="ge">0.6.24</unaffected> <vulnerable range="lt">0.6.24</vulnerable> </package> </affected> <background> <p> Avahi is a system that facilitates service discovery on a local network. </p> </background> <description> <p> Hugo Dias reported a failed assertion in the originates_from_local_legacy_unicast_socket() function in avahi-core/server.c when processing mDNS packets with a source port of 0. </p> </description> <impact type="normal"> <p> A remote attacker could send specially crafted packets to the daemon, leading to its crash. </p> </impact> <workaround> <p> There is no known workaround at this time. </p> </workaround> <resolution> <p> All Avahi users should upgrade to the latest version: </p> <code> # emerge --sync # emerge --ask --oneshot --verbose ">=net-dns/avahi-0.6.24"</code> </resolution> <references> <uri link="https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-5081">CVE-2008-5081</uri> </references> <metadata tag="requester" timestamp="2009-01-11T18:41:03Z"> craig </metadata> <metadata tag="submitter" timestamp="2009-01-12T22:42:38Z"> p-y </metadata> <metadata tag="bugReady" timestamp="2009-01-12T22:42:49Z"> p-y </metadata> </glsa>