Microsoft Launches Open‑Source Out‑of‑Band Security Testing Platform “Dusseldorf” to Detect SSRF, XSS, and Other OAST Vulnerabilities
What Happened — Microsoft released Dusseldorf, an open‑source platform that runs inside a private environment to capture and analyze out‑of‑band traffic (DNS, HTTP, HTTPS). It automates detection of server‑side request forgery, cross‑site scripting, server‑side template injection, XML external entity flaws, and related classes by logging requests to configurable sub‑domains.
Why It Matters for Compliance & Audit Readiness
- Provides a repeatable, auditable method for identifying hard‑to‑detect OAST flaws that can undermine the SOC 2 Security principle.
- Generates immutable request logs that can be mapped to SOC 2 CC6.1 (Vulnerability Management) and retained as continuous evidence for auditors.
- Enables organizations to embed out‑of‑band testing into CI/CD pipelines, demonstrating proactive risk mitigation in line with SOC 2 Continuous Monitoring expectations.
Who Is Affected — Software developers, cloud service providers, and any organization that builds web‑facing applications handling external requests.
Recommended Actions — Deploy Dusseldorf in a staging environment, integrate its findings with your vulnerability‑management workflow, map detected issues to SOC 2 controls, and retain the capture logs as part of your audit evidence repository. Source: Help Net Security
Technical Notes — Dusseldorf operates as a DNS/HTTP/HTTPS listener suite, requires Docker, Azure CLI, Helm, and can be run locally or on Azure. It targets out‑of‑band attack vectors such as SSRF, XSS, SSTI, and XXE. Source: same as above