78 lines
2.7 KiB
XML
78 lines
2.7 KiB
XML
<?xml version="1.0" encoding="utf-8"?>
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<?xml-stylesheet href="/xsl/glsa.xsl" type="text/xsl"?>
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<?xml-stylesheet href="/xsl/guide.xsl" type="text/xsl"?>
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<!DOCTYPE glsa SYSTEM "http://www.gentoo.org/dtd/glsa.dtd">
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<glsa id="200909-19">
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<title>Dnsmasq: Multiple vulnerabilities</title>
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<synopsis>
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Multiple vulnerabilities in Dnsmasq might result in the remote execution of
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arbitrary code, or a Denial of Service.
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</synopsis>
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<product type="ebuild">dnsmasq</product>
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<announced>September 20, 2009</announced>
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<revised>September 20, 2009: 01</revised>
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<bug>282653</bug>
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<access>remote</access>
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<affected>
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<package name="net-dns/dnsmasq" auto="yes" arch="*">
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<unaffected range="ge">2.5.0</unaffected>
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<vulnerable range="lt">2.5.0</vulnerable>
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</package>
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</affected>
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<background>
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<p>
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Dnsmasq is a lightweight, easy to configure DNS forwarder and DHCP
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server. It includes support for Trivial FTP (TFTP).
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</p>
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</background>
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<description>
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<p>
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Multiple vulnerabilities have been reported in the TFTP functionality
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included in Dnsmasq:
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</p>
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<ul>
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<li>Pablo Jorge and Alberto Solino
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discovered a heap-based buffer overflow (CVE-2009-2957).</li>
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<li>An
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anonymous researcher reported a NULL pointer reference
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(CVE-2009-2958).</li>
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</ul>
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</description>
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<impact type="normal">
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<p>
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A remote attacker in the local network could exploit these
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vulnerabilities by sending specially crafted TFTP requests to a machine
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running Dnsmasq, possibly resulting in the remote execution of
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arbitrary code with the privileges of the user running the daemon, or a
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Denial of Service. NOTE: The TFTP server is not enabled by default.
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</p>
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</impact>
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<workaround>
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<p>
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You can disable the TFTP server either at buildtime by not enabling the
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"tftp" USE flag, or at runtime. Make sure "--enable-tftp" is not set in
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the DNSMASQ_OPTS variable in the /etc/conf.d/dnsmasq file and
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"enable-tftp" is not set in /etc/dnsmasq.conf, either of which would
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enable TFTP support if it is compiled in.
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</p>
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</workaround>
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<resolution>
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<p>
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All Dnsmasq users should upgrade to the latest version:
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</p>
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<code>
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# emerge --sync
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# emerge --ask --oneshot --verbose ">=net-dns/dnsmasq-2.5.0"</code>
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</resolution>
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<references>
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<uri link="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-2957">CVE-2009-2957</uri>
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<uri link="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-2958">CVE-2009-2958</uri>
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</references>
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<metadata tag="submitter" timestamp="Tue, 01 Sep 2009 10:28:12 +0000">
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a3li
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</metadata>
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<metadata tag="bugReady" timestamp="Sun, 20 Sep 2009 18:56:49 +0000">
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a3li
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</metadata>
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</glsa>
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