VULNERABILITY INTELLIGENCE

CVE-2023-31421

CVSS score5.9 MEDIUM
EPSS probability0.32%
CISA KEVNot currently listed
Published2023-10-26
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

Description

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.

Weakness classification

  • CWE-295: Improper Certificate Validation

Primary references