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.
Published 2023-10-26 04:15:16
Updated 2024-02-15 19:39:22
Source Elastic
View at NVD,   CVE.org

Products affected by CVE-2023-31421

Exploit prediction scoring system (EPSS) score for CVE-2023-31421

0.10%
Probability of exploitation activity in the next 30 days EPSS Score History
~ 42 %
Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2023-31421

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source First Seen
5.9
MEDIUM CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
2.2
3.6
Elastic
7.5
HIGH CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
3.9
3.6
NIST

CWE ids for CVE-2023-31421

References for CVE-2023-31421

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