6.5Medium

CVE-2025-37730Logstash Improper Certificate Validation in TCP output

Elastic Logstash Published: (1 year ago)

Description

Improper certificate validation in Logstash's TCP output could lead to a man-in-the-middle (MitM) attack in “client” mode, as hostname verification in TCP output was not being performed when the ssl_verification_mode => full was set.

Weakness (CWE): CWE-295

Data: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Published as the sources state it, in English.

Affected products and versions

VendorProductVersions
Elastic Logstash 8.0.0 – < 8.17.6, 8.18.0 – < 8.18.1, 9.0.0 – < 9.0.1

References and patches