Logstash Improper Certificate Validation in TCP output (Elastic Logstash)
At a glance
- Source
- NVD
- EPSS
- EPSS 0.18 % · percentile 7 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- elastic
- NVD status
- Deferred
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.
Weaknesses (CWE)
- CWE-295 — Improper Certificate Validation
References
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.1 | MEDIUM 6.5 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N | elastic |
| CVSS 3.1 | MEDIUM 6.5 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N | NVD · security@elastic.co (Secondary) |
European references
- ENISA EUVD · EUVD-2025-13629
- GCVE · GCVE-0-2025-37730
CERT-FR advisories
- CERTFR-2025-AVI-0377 — Multiples vulnérabilités dans les produits Elastic · cert.ssi.gouv.fr
Affected products
| Product | Versions |
|---|---|
| Elastic · Logstash | affected 8.0.0 < 8.17.6 ; affected 8.18.0 < 8.18.1 ; affected 9.0.0 < 9.0.1 |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| CERT-FR (ANSSI) | Licence Ouverte / Etalab 2.0 |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |