{
  "entrypoint_kind": "network_service",
  "entrypoint_detail": "Two ProFTPD FTP servers on localhost:2121 (vulnerable) and localhost:2122 (patched) handling authenticated DELE and RNFR commands",
  "service_started": true,
  "healthcheck_passed": true,
  "target_path_reached": true,
  "runtime_stack": ["proftpd-v1.3.9b", "proftpd-v1.3.9b-rnfr-patched", "ftp-python-client", "linux-proc-self-root"],
  "proof_artifacts": [
    "logs/variant_reproduction_steps.log",
    "logs/proftpd_vuln_variant.log",
    "logs/proftpd_patched_variant.log",
    "vuln_variant/artifacts/vuln_client.py",
    "vuln_variant/artifacts/patched_client.py",
    "vuln_variant/artifacts/proftpd_vuln.conf",
    "vuln_variant/artifacts/proftpd_patched.conf"
  ],
  "notes": "Both the vulnerable and patched ProFTPD instances started successfully. The vulnerable instance allowed RNFR and DELE bypasses; the patched instance blocked RNFR but still allowed the DELE bypass."
}