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<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE glsa SYSTEM "http://www.gentoo.org/dtd/glsa.dtd">
<glsa id="200904-05">
<title>ntp: Certificate validation error</title>
<synopsis>
An error in the OpenSSL certificate chain validation in ntp might allow for
spoofing attacks.
</synopsis>
<product type="ebuild">ntp</product>
<announced>April 05, 2009</announced>
<revised>April 05, 2009: 01</revised>
<bug>254098</bug>
<access>remote</access>
<affected>
<package name="net-misc/ntp" auto="yes" arch="*">
<unaffected range="ge">4.2.4_p6</unaffected>
<vulnerable range="lt">4.2.4_p6</vulnerable>
</package>
</affected>
<background>
<p>
ntp contains the client and daemon implementations for the Network Time
Protocol.
</p>
</background>
<description>
<p>
It has been reported that ntp incorrectly checks the return value of
the EVP_VerifyFinal(), a vulnerability related to CVE-2008-5077 (GLSA
200902-02).
</p>
</description>
<impact type="normal">
<p>
A remote attacker could exploit this vulnerability to spoof arbitrary
names to conduct Man-In-The-Middle attacks and intercept sensitive
information.
</p>
</impact>
<workaround>
<p>
There is no known workaround at this time.
</p>
</workaround>
<resolution>
<p>
All ntp users should upgrade to the latest version:
</p>
<code>
# emerge --sync
# emerge --ask --oneshot --verbose &quot;&gt;=net-misc/ntp-4.2.4_p6&quot;</code>
</resolution>
<references>
<uri link="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-5077">CVE-2008-5077</uri>
<uri link="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-0021">CVE-2009-0021</uri>
<uri link="/security/en/glsa/glsa-200902-02.xml">GLSA 200902-02</uri>
</references>
<metadata tag="submitter" timestamp="Tue, 31 Mar 2009 11:41:38 +0000">
p-y
</metadata>
<metadata tag="bugReady" timestamp="Tue, 31 Mar 2009 11:41:46 +0000">
p-y
</metadata>
</glsa>