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<?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>January 14, 2009</announced>
<revised>January 14, 2009: 01</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 &quot;&gt;=net-dns/avahi-0.6.24&quot;</code>
</resolution>
<references>
<uri link="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-5081">CVE-2008-5081</uri>
</references>
<metadata tag="requester" timestamp="Sun, 11 Jan 2009 18:41:03 +0000">
craig
</metadata>
<metadata tag="submitter" timestamp="Mon, 12 Jan 2009 22:42:38 +0000">
p-y
</metadata>
<metadata tag="bugReady" timestamp="Mon, 12 Jan 2009 22:42:49 +0000">
p-y
</metadata>
</glsa>