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+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE glsa SYSTEM "http://www.gentoo.org/dtd/glsa.dtd">
+<glsa id="202105-02">
+  <title>stunnel: Improper certificate validation</title>
+  <synopsis>Stunnel was not properly verifying TLS certificates, possibly
+    allowing an integrity/confidentiality compromise.
+  </synopsis>
+  <product type="ebuild">stunnel</product>
+  <announced>2021-05-26</announced>
+  <revised count="1">2021-05-26</revised>
+  <bug>772146</bug>
+  <access>local, remote</access>
+  <affected>
+    <package name="net-misc/stunnel" auto="yes" arch="*">
+      <unaffected range="ge">5.58</unaffected>
+      <vulnerable range="lt">5.58</vulnerable>
+    </package>
+  </affected>
+  <background>
+    <p>The stunnel program is designed to work as an SSL/TLS encryption wrapper
+      between a client and a local or remote server.
+    </p>
+  </background>
+  <description>
+    <p>It was discovered that stunnel did not correctly verified the client
+      certificate when options “redirect” and “verifyChain” are used.
+    </p>
+  </description>
+  <impact type="low">
+    <p>A remote attacker could send a specially crafted certificate, possibly
+      resulting in a breach of integrity or confidentiality.
+    </p>
+  </impact>
+  <workaround>
+    <p>There is no known workaround at this time.</p>
+  </workaround>
+  <resolution>
+    <p>All stunnel users should upgrade to the latest version:</p>
+    
+    <code>
+      # emerge --sync
+      # emerge --ask --oneshot --verbose "&gt;=net-misc/stunnel-5.58"
+    </code>
+    
+  </resolution>
+  <references>
+    <uri link="https://nvd.nist.gov/vuln/detail/CVE-2021-20230">CVE-2021-20230</uri>
+  </references>
+  <metadata tag="requester" timestamp="2021-05-25T22:51:07Z">whissi</metadata>
+  <metadata tag="submitter" timestamp="2021-05-26T07:44:01Z">whissi</metadata>
+</glsa>