Critical Arbitrary Code Execution in Elastic Kibana Timelion (CVE‑2019‑7609)
What It Is
A remote code execution flaw resides in Kibana’s Timelion visualizer. An attacker who can send a crafted request to the Timelion endpoint can execute arbitrary commands on the underlying host with the privileges of the Kibana service.
Exploitability
- CVSS v3.1 base score: 9.8 (Critical).
- Public proof‑of‑concept code has been released and is referenced in the CISA Known Exploited Vulnerabilities (KEV) catalog.
- No widespread active exploitation reports, but the vulnerability is trivially exploitable in any unpatched deployment.
Affected Products
- Vendor: Elastic
- Product: Kibana (all versions prior to the security patch released in June 2019, e.g., < 6.5.4).
Why It Matters for Compliance & Audit Readiness
The flaw bypasses the access‑control boundary that Kibana is expected to enforce, undermining the integrity of visualized data and the confidentiality of any downstream analytics pipelines. From a control‑assurance perspective, this directly impacts:
- Control Mapping (NIST CM‑3, ISO 27001 A.12.1.2): Demonstrating that software components are kept up‑to‑date is a core evidence point for a defensible audit trail.
- Continuous Monitoring: Detecting anomalous Timelion requests or unexpected process spawns provides the “real‑time evidence” auditors look for when assessing the effectiveness of monitoring controls.
Failing to remediate leaves organizations exposed to a breach that could be cited as a lapse in vendor‑management and patch‑management controls, jeopardizing compliance with frameworks such as NIST CSF, ISO 27001, and GDPR‑related data‑integrity obligations.
Recommended Actions
- Inventory & Version Check: Identify every Kibana instance and confirm the running version.
- Patch Management: Upgrade to the patched release (≥ 6.5.4) or apply the vendor‑provided mitigation.
- Network Segmentation & WAF Rules: Restrict access to the Timelion endpoint to trusted sources; block unexpected HTTP methods.
- Log Monitoring: Enable detailed request logging for Kibana and set alerts for abnormal Timelion activity or process creation events.
- Audit Evidence Capture: Document the patch‑status, network controls, and monitoring rules in your control‑mapping repository to demonstrate due diligence.
Source: CISA KEV – CVE‑2019‑7609