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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="201703-04">
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<title>cURL: Certificate validation error</title>
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<synopsis>A coding error has been found in cURL, causing the TLS Certificate
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Status Request extension check to always return true.
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</synopsis>
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<product type="ebuild">curl</product>
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<announced>2017-03-28</announced>
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<revised count="1">2017-03-28</revised>
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<bug>610572</bug>
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<access>remote</access>
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<affected>
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<package name="net-misc/curl" auto="yes" arch="*">
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<unaffected range="ge">7.53.0</unaffected>
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<vulnerable range="lt">7.53.0</vulnerable>
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</package>
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</affected>
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<background>
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<p>cURL is a tool and libcurl is a library for transferring data with URL
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syntax.
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</p>
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</background>
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<description>
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<p>cURL and applications linked against libcurl support “OCSP
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stapling”, also known as the TLS Certificate Status Request extension
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(using the CURLOPT_SSL_VERIFYSTATUS option). When telling cURL to use
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this feature, it uses that TLS extension to ask for a fresh proof of the
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server’s certificate’s validity. If the server doesn’t support the
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extension, or fails to provide said proof, cURL is expected to return an
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error.
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Due to a coding mistake, the code that checks for a test success or
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failure, ends up always thinking there’s valid proof, even when there
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is none or if the server doesn’t support the TLS extension in question.
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</p>
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</description>
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<impact type="normal">
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<p>Due to the error, a user maybe does not detect when a server’s
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certificate goes invalid or otherwise be mislead that the server is in a
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better shape than it is in reality.
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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 cURL 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 ">=net-misc/curl-7.53.0"
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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-2017-2629">CVE-2017-2629</uri>
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</references>
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<metadata tag="requester" timestamp="2017-03-07T21:41:04Z">BlueKnight</metadata>
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<metadata tag="submitter" timestamp="2017-03-28T01:57:09Z">whissi</metadata>
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</glsa>
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