Critical RCE in Apache Struts 1 (CVE‑2017‑9791) – Improper Input Validation Vulnerability
What It Is – Apache Struts 1’s ActionMessage component fails to properly validate raw field values, allowing an attacker to inject malicious content that can be executed on the server.
Exploitability – Publicly disclosed; proof‑of‑concept code exists. The CVSS v3.1 base score is 9.8 (Critical), indicating a remote‑code‑execution vector that requires no authentication.
Affected Products – Apache Struts 1.x (all versions up to 1.3.10).
Why It Matters for Trust & Control Assurance
- Highlights the need for a vulnerability‑management control that ensures timely identification, assessment, and remediation of software flaws.
- Demonstrates how continuous evidence of patching feeds a defensible audit trail required by buyers demanding proof of a robust security posture.
- Aligns with the control objective of secure development and configuration, which maps to multiple frameworks (e.g., NIST CSF 2.0, ISO 27001).
Recommended Actions
- Inventory all applications using Apache Struts 1 and verify version numbers.
- Apply the official Apache security patch or upgrade to a supported Struts version immediately.
- Record remediation evidence (patch tickets, configuration snapshots) in your control‑mapping repository.
- Integrate automated scanning for this CVE into your continuous monitoring pipeline.
Source: CISA KEV – CVE‑2017‑9791