{"id":"BIT-logstash-2025-37730","summary":"Logstash Improper Certificate Validation in TCP output","details":"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 =\u003e full was set.","aliases":["CVE-2025-37730"],"modified":"2025-05-20T10:02:07.006Z","published":"2025-05-08T05:42:10.346Z","database_specific":{"severity":"Medium","cpes":["cpe:2.3:a:elastic:logstash:*:*:*:*:*:ruby:*:*"]},"references":[{"type":"WEB","url":"https://discuss.elastic.co/t/logstash-8-17-6-8-18-1-and-9-0-1-security-update-esa-2025-08/377869"},{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-37730"}],"affected":[{"package":{"name":"logstash","ecosystem":"Bitnami","purl":"pkg:bitnami/logstash"},"ranges":[{"type":"SEMVER","events":[{"introduced":"8.0.0"},{"fixed":"8.18.1"},{"introduced":"9.0.0"},{"fixed":"9.0.1"}]}],"database_specific":{"source":"https://github.com/bitnami/vulndb/tree/main/data/logstash/BIT-logstash-2025-37730.json"},"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N"}]}],"schema_version":"1.7.3"}