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68 lines
2.0 KiB
68 lines
2.0 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="200904-10">
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<title>Avahi: Denial of Service</title>
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<synopsis>
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An error in Avahi might lead to a Denial of Service via network and CPU
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consumption.
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</synopsis>
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<product type="ebuild">avahi</product>
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<announced>2009-04-08</announced>
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<revised count="01">2009-04-08</revised>
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<bug>260971</bug>
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<access>remote</access>
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<affected>
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<package name="net-dns/avahi" auto="yes" arch="*">
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<unaffected range="ge">0.6.24-r2</unaffected>
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<vulnerable range="lt">0.6.24-r2</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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Avahi is a system that facilitates service discovery on a local
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network.
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</p>
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</background>
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<description>
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<p>
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Rob Leslie reported that the
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originates_from_local_legacy_unicast_socket() function in
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avahi-core/server.c does not account for the network byte order of a
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port number when processing incoming multicast packets, leading to a
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multicast packet storm.
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</p>
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</description>
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<impact type="normal">
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<p>
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A remote attacker could send specially crafted legacy unicast mDNS
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query packets to the Avahi daemon, resulting in a Denial of Service due
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to network bandwidth and CPU consumption.
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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 Avahi 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/avahi-0.6.24-r2"</code>
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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-2009-0758">CVE-2009-0758</uri>
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</references>
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<metadata tag="requester" timestamp="2009-04-04T13:49:21Z">
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rbu
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</metadata>
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<metadata tag="submitter" timestamp="2009-04-04T13:56:36Z">
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rbu
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</metadata>
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<metadata tag="bugReady" timestamp="2009-04-04T13:57:02Z">
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rbu
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</metadata>
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</glsa>
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