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73 lines
2.3 KiB
73 lines
2.3 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="200807-08">
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<title>BIND: Cache poisoning</title>
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<synopsis>
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A weakness in the DNS protocol has been reported, which could lead to cache
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poisoning on recursive resolvers.
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</synopsis>
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<product type="ebuild">bind</product>
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<announced>2008-07-11</announced>
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<revised count="01">2008-07-11</revised>
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<bug>231201</bug>
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<access>remote</access>
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<affected>
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<package name="net-dns/bind" auto="yes" arch="*">
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<unaffected range="ge">9.4.2_p1</unaffected>
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<vulnerable range="lt">9.4.2_p1</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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ISC BIND is the Internet Systems Consortium implementation of the
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Domain Name System (DNS) protocol.
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</p>
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</background>
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<description>
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<p>
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Dan Kaminsky of IOActive has reported a weakness in the DNS protocol
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related to insufficient randomness of DNS transaction IDs and query
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source ports.
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</p>
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</description>
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<impact type="high">
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<p>
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An attacker could exploit this weakness to poison the cache of a
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recursive resolver and thus spoof DNS traffic, which could e.g. lead to
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the redirection of web or mail traffic to malicious sites.
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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 BIND 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/bind-9.4.2_p1"</code>
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<p>
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Note: In order to utilize the query port randomization to mitigate the
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weakness, you need to make sure that your network setup allows the DNS
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server to use random source ports for query and that you have not set a
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fixed query port via the "query-source port" directive in the BIND
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configuration.
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</p>
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</resolution>
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<references>
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<uri link="https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-1447">CVE-2008-1447</uri>
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</references>
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<metadata tag="requester" timestamp="2008-07-09T08:55:27Z">
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vorlon
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</metadata>
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<metadata tag="submitter" timestamp="2008-07-09T14:42:45Z">
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vorlon
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</metadata>
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<metadata tag="bugReady" timestamp="2008-07-11T17:35:39Z">
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rbu
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</metadata>
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</glsa>
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