52 lines
1.8 KiB
XML
52 lines
1.8 KiB
XML
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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="202105-02">
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<title>stunnel: Improper certificate validation</title>
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<synopsis>Stunnel was not properly verifying TLS certificates, possibly
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allowing an integrity/confidentiality compromise.
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</synopsis>
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<product type="ebuild">stunnel</product>
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<announced>2021-05-26</announced>
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<revised count="1">2021-05-26</revised>
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<bug>772146</bug>
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<access>local, remote</access>
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<affected>
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<package name="net-misc/stunnel" auto="yes" arch="*">
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<unaffected range="ge">5.58</unaffected>
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<vulnerable range="lt">5.58</vulnerable>
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</package>
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</affected>
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<background>
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<p>The stunnel program is designed to work as an SSL/TLS encryption wrapper
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between a client and a local or remote server.
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</p>
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</background>
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<description>
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<p>It was discovered that stunnel did not correctly verified the client
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certificate when options “redirect” and “verifyChain” are used.
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</p>
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</description>
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<impact type="low">
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<p>A remote attacker could send a specially crafted certificate, possibly
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resulting in a breach of integrity or confidentiality.
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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 stunnel 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/stunnel-5.58"
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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/vuln/detail/CVE-2021-20230">CVE-2021-20230</uri>
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</references>
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<metadata tag="requester" timestamp="2021-05-25T22:51:07Z">whissi</metadata>
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<metadata tag="submitter" timestamp="2021-05-26T07:44:01Z">whissi</metadata>
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</glsa>
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