Intel/AIKIDO-2025-10439
logstash-output-tcp
AIKIDO-2025-10439
logstash-output-tcp is vulnerable to Improper Certificate Validation
Improper Certificate ValidationCVE-2025-37730 Published Jul 7, 2025
65
Medium Risk
This Affects:
logstash-output-tcp6.0.0 - 6.2.1
Fixed in 6.2.27.0.0 - 7.0.0
Fixed in 7.0.1Are you affected? Scan for Free
TL;DR
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.
Who does this affect?
You are affected if you are using a version that falls within the vulnerable range.
Background info
logstash-output-tcp is vulnerable to Improper Certificate Validation in versions 6.0.0 - 6.2.1 and 7.0.0 - 7.0.0.
How to fix this
Upgrade the logstash-output-tcp library to the patch version.
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