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CVE PROGRAM SOURCE RECORD6.5 Medium

CVE-2025-37730

Logstash Improper Certificate Validation in TCP output

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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Elastic Logstash

Default version status: unaffected

  • 8.0.0 to < 8.17.6affected
  • 8.18.0 to < 8.18.1affected
  • 9.0.0 to < 9.0.1affected

References