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70 lines
2.2 KiB
70 lines
2.2 KiB
<?xml version="1.0" encoding="utf-8"?>
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<!DOCTYPE glsa SYSTEM "http://www.gentoo.org/dtd/glsa.dtd">
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<glsa id="200504-03">
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<title>Dnsmasq: Poisoning and Denial of Service vulnerabilities</title>
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<synopsis>
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Dnsmasq is vulnerable to DNS cache poisoning attacks and a potential Denial
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of Service from the local network.
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</synopsis>
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<product type="ebuild">Dnsmasq</product>
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<announced>April 04, 2005</announced>
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<revised>April 04, 2005: 01</revised>
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<bug>86718</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">2.22</unaffected>
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<vulnerable range="lt">2.22</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 and easily-configurable DNS forwarder and
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DHCP server.
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</p>
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</background>
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<description>
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<p>
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Dnsmasq does not properly detect that DNS replies received do not
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correspond to any DNS query that was sent. Rob Holland of the Gentoo
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Linux Security Audit team also discovered two off-by-one buffer
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overflows that could crash DHCP lease files parsing.
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</p>
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</description>
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<impact type="low">
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<p>
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A remote attacker could send malicious answers to insert arbitrary
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DNS data into the Dnsmasq cache. These attacks would in turn help an
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attacker to perform man-in-the-middle and site impersonation attacks.
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The buffer overflows might allow an attacker on the local network to
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crash Dnsmasq upon restart.
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</p>
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</impact>
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<workaround>
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<p>
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There is no known workaround at this time.
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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-2.22"</code>
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</resolution>
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<references>
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<uri link="http://www.thekelleys.org.uk/dnsmasq/CHANGELOG">Dnsmasq Changelog</uri>
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</references>
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<metadata tag="requester" timestamp="Mon, 28 Mar 2005 07:00:46 +0000">
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jaervosz
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</metadata>
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<metadata tag="submitter" timestamp="Mon, 28 Mar 2005 13:54:22 +0000">
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koon
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</metadata>
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<metadata tag="bugReady" timestamp="Mon, 4 Apr 2005 11:10:45 +0000">
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koon
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</metadata>
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</glsa>
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