Critical Remote Code Execution in Apache Struts (CVE‑2017‑5638) Threatens Web Applications
What It Is — A flaw in Apache Struts’ Jakarta Multipart parser allows an attacker to supply a crafted Content‑Type header that triggers arbitrary code execution on the vulnerable server.
Exploitability — Actively exploited in the wild (e.g., the 2017 Equifax breach). The CVSS v3.1 base score is 10.0 (Critical).
Affected Products — Apache Struts 2.3.5 – 2.3.31 and 2.5 – 2.5.13 (all deployments that rely on the vulnerable multipart parser).
Why It Matters for Trust & Control Assurance
- Demonstrates the need for a continuous vulnerability‑management control that can be mapped to multiple frameworks (e.g., NIST CSF, ISO 27001) and evidenced in audit reports.
- Highlights the importance of timely patching evidence as part of a defensible control‑assurance posture—buyers now request proof that known exploits are remediated.
- Shows how a single control objective—maintain secure configuration and timely remediation—covers requirements across SOC 2, PCI DSS, and GDPR, delivering a unified trust signal.
Recommended Actions
- Identify any applications using the affected Struts versions.
- Apply Apache’s patches (Struts 2.3.32 or 2.5.14) immediately.
- Record remediation in your control‑mapping repository and capture evidence for audit readiness.
- Enable continuous monitoring to verify that the patch remains applied and that no re‑introduction occurs.
Source: CISA KEV – CVE‑2017‑5638