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<?xml version="1.0" encoding="utf-8"?>
<glsa id="200908-02">
<title>BIND: Denial of Service</title>
Dynamic Update packets can cause a Denial of Service in the BIND daemon.
<product type="ebuild">bind</product>
<announced>August 01, 2009</announced>
<revised>August 01, 2009: 01</revised>
<package name="net-dns/bind" auto="yes" arch="*">
<unaffected range="ge">9.4.3_p3</unaffected>
<vulnerable range="lt">9.4.3_p3</vulnerable>
ISC BIND is the Internet Systems Consortium implementation of the
Domain Name System (DNS) protocol.
Matthias Urlichs reported that the dns_db_findrdataset() function fails
when the prerequisite section of the dynamic update message contains a
record of type "ANY" and where at least one RRset for this FQDN exists
on the server.
<impact type="normal">
A remote unauthenticated attacker could send a specially crafted
dynamic update message to the BIND daemon (named), leading to a Denial
of Service (daemon crash). This vulnerability affects all primary
(master) servers -- it is not limited to those that are configured to
allow dynamic updates.
Configure a firewall that performs Deep Packet Inspection to prevent
nsupdate messages from reaching named. Alternatively, expose only
secondary (slave) servers to untrusted networks.
All BIND users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose &quot;&gt;=net-dns/bind-9.4.3_p3&quot;</code>
<uri link="">CVE-2009-0696</uri>
<uri link="">ISC advisory</uri>
<metadata tag="submitter" timestamp="Tue, 28 Jul 2009 21:43:47 +0000">
<metadata tag="bugReady" timestamp="Sat, 01 Aug 2009 20:00:21 +0000">