CVE-2023-31421 (published 2023-10-26T03:10:52.684Z)
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's IP SAN values against that IP address and certificate validation fails, and therefore the connection is not blocked as expected.
Affected products: Vendor: Elastic
Product: Beats
Versions: 8.0.0, 8.9.2