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67 lines
2.0 KiB
67 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="201001-01">
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<title>NTP: Denial of Service</title>
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<synopsis>
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A Denial of Service condition in ntpd can cause excessive CPU or bandwidth
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consumption.
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</synopsis>
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<product type="ebuild">ntp</product>
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<announced>January 03, 2010</announced>
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<revised>January 03, 2010: 01</revised>
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<bug>290881</bug>
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<access>remote</access>
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<affected>
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<package name="net-misc/ntp" auto="yes" arch="*">
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<unaffected range="ge">4.2.4_p7-r1</unaffected>
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<vulnerable range="lt">4.2.4_p7-r1</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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NTP is a set of the Network Time Protocol programs.
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</p>
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</background>
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<description>
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<p>
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Robin Park and Dmitri Vinokurov discovered that ntp_request.c in ntpd
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does not handle MODE_PRIVATE packets correctly, causing a continuous
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exchange of MODE_PRIVATE error responses between two NTP daemons or
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causing high CPU load on a single host.
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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, unauthenticated attacker could send a specially crafted
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MODE_PRIVATE packet, allowing for a Denial of Service condition (CPU
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and bandwidth 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 NTP 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-misc/ntp-4.2.4_p7-r1"</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-2009-3563">CVE-2009-3563</uri>
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</references>
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<metadata tag="requester" timestamp="Thu, 10 Dec 2009 20:02:44 +0000">
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craig
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</metadata>
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<metadata tag="submitter" timestamp="Wed, 30 Dec 2009 15:53:37 +0000">
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craig
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</metadata>
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<metadata tag="bugReady" timestamp="Sun, 03 Jan 2010 00:05:58 +0000">
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craig
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</metadata>
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</glsa>
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