VULNERABILITY INTELLIGENCE

CVE-2021-22138

CVSS score3.7 LOW

EPSS probability0.46%

CISA KEVNot currently listed

Published2021-05-13

Last modified2026-06-17

CVSS vectorCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N

Description

In Logstash versions after 6.4.0 and before 6.8.15 and 7.12.0 a TLS certificate validation flaw was found in the monitoring feature. When specifying a trusted server CA certificate Logstash would not properly verify the certificate returned by the monitoring server. This could result in a man in the middle style attack against the Logstash monitoring data.

Weakness classification

security@elastic.co: CWE-295
nvd@nist.gov: CWE-295

Primary references

security@elastic.co — Vendor Advisory
security@elastic.co — Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108 — Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108 — Third Party Advisory