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<?xml version="1.0" encoding="utf-8"?>
<glsa id="200909-19">
<title>Dnsmasq: Multiple vulnerabilities</title>
Multiple vulnerabilities in Dnsmasq might result in the remote execution of
arbitrary code, or a Denial of Service.
<product type="ebuild">dnsmasq</product>
<announced>September 20, 2009</announced>
<revised>September 20, 2009: 01</revised>
<package name="net-dns/dnsmasq" auto="yes" arch="*">
<unaffected range="ge">2.5.0</unaffected>
<vulnerable range="lt">2.5.0</vulnerable>
Dnsmasq is a lightweight, easy to configure DNS forwarder and DHCP
server. It includes support for Trivial FTP (TFTP).
Multiple vulnerabilities have been reported in the TFTP functionality
included in Dnsmasq:
<li>Pablo Jorge and Alberto Solino
discovered a heap-based buffer overflow (CVE-2009-2957).</li>
anonymous researcher reported a NULL pointer reference
<impact type="normal">
A remote attacker in the local network could exploit these
vulnerabilities by sending specially crafted TFTP requests to a machine
running Dnsmasq, possibly resulting in the remote execution of
arbitrary code with the privileges of the user running the daemon, or a
Denial of Service. NOTE: The TFTP server is not enabled by default.
You can disable the TFTP server either at buildtime by not enabling the
"tftp" USE flag, or at runtime. Make sure "--enable-tftp" is not set in
the DNSMASQ_OPTS variable in the /etc/conf.d/dnsmasq file and
"enable-tftp" is not set in /etc/dnsmasq.conf, either of which would
enable TFTP support if it is compiled in.
All Dnsmasq users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose &quot;&gt;=net-dns/dnsmasq-2.5.0&quot;</code>
<uri link="">CVE-2009-2957</uri>
<uri link="">CVE-2009-2958</uri>
<metadata tag="submitter" timestamp="Tue, 01 Sep 2009 10:28:12 +0000">
<metadata tag="bugReady" timestamp="Sun, 20 Sep 2009 18:56:49 +0000">