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      <title>CVE-2023-31421 — Beats, Elastic Agent, APM Server, and Fleet Server Improper Certificate Validation issue</title>
      <link>https://cve.radiocsirt.org/vuln/cve-2023-31421</link>
      <description>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; Elastic Beats, Elastic Agent, Elastic APM Server, Elastic Fleet Server&lt;/p&gt;
&lt;p&gt;It was discovered that when acting as TLS clients, Beats, Elastic Agent, APM Server, and Fleet Server did not verify whether the server certificate is valid for the target IP address; however, certificate signature validation is still performed. More specifically, when the client is configured to connect to an IP address (instead of a hostname) it does not validate the server certificate&amp;#39;s IP SAN values against that IP address and certificate validation fails, and therefore the connection is not blocked as expected.&lt;/p&gt;</description>
      <content:encoded>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; Elastic Beats, Elastic Agent, Elastic APM Server, Elastic Fleet Server&lt;/p&gt;
&lt;p&gt;It was discovered that when acting as TLS clients, Beats, Elastic Agent, APM Server, and Fleet Server did not verify whether the server certificate is valid for the target IP address; however, certificate signature validation is still performed. More specifically, when the client is configured to connect to an IP address (instead of a hostname) it does not validate the server certificate&amp;#39;s IP SAN values against that IP address and certificate validation fails, and therefore the connection is not blocked as expected.&lt;/p&gt;</content:encoded>
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