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NET 4 Security

Medium 17 items · 4 hours
testuser's avatar
testuser Published 2 months ago
Security

This checklist captures core steps to secure Microsoft .NET Framework 4.0 using DISA STIG guidance and SCAP content. It’s for system administrators and security engineers who maintain .NET 4 hosts and want a practical, repeatable hardening process.

Source: https://ncp.nist.gov/checklist/432

Progress
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  1. Download DISA SCAP and STIG benchmark files — Get the SCAP 1.3 content and STIG benchmark (Ver 2, Rel 7) from DISA.
  2. Download XCCDF standalone file — Obtain the XCCDF 1.1.4 file for the .NET 4 STIG.
  3. Download automated SCC/SCC tool content — Retrieve the automated SCC content for SCC/SCC tool ingestion.
  4. Import SCAP/XCCDF content into your SCAP/SCC tool — Load the benchmark into your compliance scanner or SCC tool to evaluate hosts.
  5. Install latest .NET 4 security patches — Apply all vendor security updates for .NET Framework 4.0 before configuring.
  6. Enable automatic updates for .NET and Windows — Configure patching to reduce exposure to newly discovered vulnerabilities.
  7. Backup current machine.config and web.config before changes — Save copies of config files and permissions so you can roll back if needed.
  8. Harden machine.config and web.config files — Remove insecure settings, enforce strict permissions, and close unnecessary surface area.
  9. Apply Microsoft .NET Framework 4 STIG settings — Implement DISA STIG recommendations for CLR, runtime, and security-related settings.
  10. Restrict ASP.NET trust levels and configure Code Access Security — Enforce least-privilege trust levels and restrict assembly permissions for apps.
  11. Remove or disable unused .NET components and features — Uninstall optional assemblies and features that are not required by applications.
  12. Configure logging and auditing for .NET applications — Enable sufficient logging and forward events to your SIEM or central log store.
  13. Run a vulnerability scan and address any CVEs — Use SCAP-enabled scanning tools to validate compliance and remediate findings.
  14. Test applications in a staging environment after changes — Validate functionality and performance before deploying hardened configs to production.
  15. Document configuration changes and create a rollback plan — Record exact changes, reasons, and rollback steps for audits and recovery.
  16. Subscribe to DISA and vendor security update feeds — Monitor for STIG updates, SCAP revisions, and new advisories.
  17. Schedule periodic reviews and rescans — Reassess configurations quarterly or after major updates to maintain compliance.
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