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<?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="200905-08">
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<title>NTP: Remote execution of arbitrary code</title>
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<synopsis>
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Multiple errors in the NTP client and server programs might allow for the
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remote execution of arbitrary code.
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</synopsis>
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<product type="ebuild">ntp</product>
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<announced>2009-05-26</announced>
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<revised count="01">2009-05-26</revised>
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<bug>263033</bug>
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<bug>268962</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</unaffected>
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<vulnerable range="lt">4.2.4_p7</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 contains the client and daemon implementations for the Network Time
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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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Multiple vulnerabilities have been found in the programs included in
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the NTP package:
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</p>
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<ul>
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<li>Apple Product Security reported a
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boundary error in the cookedprint() function in ntpq/ntpq.c, possibly
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leading to a stack-based buffer overflow (CVE-2009-0159).</li>
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<li>Chris Ries of CMU reported a boundary error within the
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crypto_recv() function in ntpd/ntp_crypto.c, possibly leading to a
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stack-based buffer overflow (CVE-2009-1252).</li>
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</ul>
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</description>
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<impact type="high">
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<p>
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A remote attacker might send a specially crafted package to a machine
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running ntpd, possibly resulting in the remote execution of arbitrary
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code with the privileges of the user running the daemon, or a Denial of
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Service. NOTE: Successful exploitation requires the "autokey" feature
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to be enabled. This feature is only available if NTP was built with the
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'ssl' USE flag.
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</p>
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<p>
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Furthermore, a remote attacker could entice a user into connecting to a
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malicious server using ntpq, possibly resulting in the remote execution
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of arbitrary code with the privileges of the user running the
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application, or a Denial of Service.
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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 protect against CVE-2009-1252 by disabling the 'ssl' USE flag
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and recompiling NTP.
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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"</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-2009-0159">CVE-2009-0159</uri>
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<uri link="https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-1252">CVE-2009-1252</uri>
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</references>
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<metadata tag="submitter" timestamp="2009-05-25T17:26:27Z">
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a3li
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</metadata>
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<metadata tag="bugReady" timestamp="2009-05-25T17:27:05Z">
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a3li
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</metadata>
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</glsa>
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