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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="201709-04">
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<title>mod_gnutls: Certificate validation error</title>
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<synopsis>A vulnerability in mod_gnutls allows remote attackers to spoof
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clients via crafted certificates.
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</synopsis>
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<product type="ebuild">mod_gnutls</product>
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<announced>2017-09-17</announced>
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<revised count="1">2017-09-17</revised>
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<bug>541038</bug>
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<access>remote</access>
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<affected>
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<package name="www-apache/mod_gnutls" auto="yes" arch="*">
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<unaffected range="ge">0.7.3</unaffected>
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<vulnerable range="lt">0.7.3</vulnerable>
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</package>
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</affected>
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<background>
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<p>mod_gnutls is an extension for Apache’s httpd. It uses the
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GnuTLS library to provide HTTPS. It supports some protocols and
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features that mod_ssl does not.
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</p>
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</background>
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<description>
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<p>It was discovered that the authentication hook in mod_gnutls does not
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validate client’s certificates even when option
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“GnuTLSClientVerify” is set to “require”.
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</p>
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</description>
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<impact type="normal">
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<p>A remote attacker could present a crafted certificate and spoof clients
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data.
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</p>
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</impact>
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<workaround>
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<p>There is no known workaround at this time.</p>
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</workaround>
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<resolution>
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<p>All mod_gnutls users should upgrade to the latest version:</p>
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<code>
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# emerge --sync
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# emerge --ask --oneshot --verbose ">=www-apache/mod_gnutls-0.7.3"
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</code>
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</resolution>
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<references>
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<uri link="https://nvd.nist.gov/nvd.cfm?cvename=CVE-2015-2091">
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CVE-2015-2091
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</uri>
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</references>
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<metadata tag="requester" timestamp="2017-06-17T21:37:14Z">whissi</metadata>
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<metadata tag="submitter" timestamp="2017-09-17T15:43:18Z">chrisadr</metadata>
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</glsa>
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