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<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE glsa SYSTEM "http://www.gentoo.org/dtd/glsa.dtd">
<glsa id="200809-02">
<title>dnsmasq: Denial of Service and DNS spoofing</title>
<synopsis>
Two vulnerabilities in dnsmasq might allow for a Denial of Service or
spoofing of DNS replies.
</synopsis>
<product type="ebuild">dnsmasq</product>
<announced>September 04, 2008</announced>
<revised>September 04, 2008: 01</revised>
<bug>231282</bug>
<bug>232523</bug>
<access>remote</access>
<affected>
<package name="net-dns/dnsmasq" auto="yes" arch="*">
<unaffected range="ge">2.45</unaffected>
<vulnerable range="lt">2.45</vulnerable>
</package>
</affected>
<background>
<p>
Dnsmasq is a lightweight and easily-configurable DNS forwarder and DHCP
server.
</p>
</background>
<description>
<ul>
<li>
Dan Kaminsky of IOActive reported that dnsmasq does not randomize UDP
source ports when forwarding DNS queries to a recursing DNS server
(CVE-2008-1447).
</li>
<li>
Carlos Carvalho reported that dnsmasq in the 2.43 version does not
properly handle clients sending inform or renewal queries for unknown
DHCP leases, leading to a crash (CVE-2008-3350).
</li>
</ul>
</description>
<impact type="normal">
<p>
A remote attacker could send spoofed DNS response traffic to dnsmasq,
possibly involving generating queries via multiple vectors, and spoof
DNS replies, which could e.g. lead to the redirection of web or mail
traffic to malicious sites. Furthermore, an attacker could generate
invalid DHCP traffic and cause a Denial of Service.
</p>
</impact>
<workaround>
<p>
There is no known workaround at this time.
</p>
</workaround>
<resolution>
<p>
All dnsmasq users should upgrade to the latest version:
</p>
<code>
# emerge --sync
# emerge --ask --oneshot --verbose &quot;&gt;=net-dns/dnsmasq-2.45&quot;</code>
</resolution>
<references>
<uri link="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-3350">CVE-2008-3350</uri>
<uri link="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-1447">CVE-2008-1447</uri>
</references>
<metadata tag="requester" timestamp="Sun, 13 Jul 2008 19:25:11 +0000">
p-y
</metadata>
<metadata tag="submitter" timestamp="Tue, 19 Aug 2008 23:52:40 +0000">
rbu
</metadata>
<metadata tag="bugReady" timestamp="Tue, 19 Aug 2008 23:52:59 +0000">
rbu
</metadata>
</glsa>