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6.5 Medium

CVE-2025-37730 Improper certificate validation in Logstash's TCP output could lead to a man-in-the-middle (MitM) attack in “client”…

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 and versions

Product Affected versions Fixed in
Logstash 9.0 9.0.0 → < 9.0.1 9.0.1
Logstash 8.18 8.18.0 → < 8.18.1 8.18.1
Logstash 8.0 8.0.0 → < 8.17.6 8.17.6

References

Timeline

  1. Published
  2. Last modified

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