DISA STIG

What Is DISA STIG?

The Defense Information Systems Agency (DISA) is part of the U.S. Department of Defense (DoD) that issues Security Technical Implementation Guides (STIGs). STIGs provide detailed hardening frameworks that provide step-by-step instructions for locking down software and hardware. Many organizations use DISA STIGs as a benchmark for robust cybersecurity practices; however, compliance with STIGs is mandatory for DoD systems and contractors.

Each STIG provides a checklist that targets a specific product or domain. For example, the Application Security and Development (ASD) STIG defines nearly 300 security requirements (32 Category I) for DoD applications throughout the software lifecycle. These requirements help development teams implement security controls, such as cryptography, access checks, and session management, that guard against vulnerabilities in deployed software. The ASD STIG also requires the use of coding guidelines with verifiable compliance throughout the development lifecycle of an application.

Why Are DISA STIGs Important?

DISA STIGs codify the security requirements needed in sensitive software. Each STIG provides detailed guidance to secure systems that may be vulnerable. For example, the ASD STIG mandates protections such as clearing session data on logout, enforcing encryption for remote sessions, and blocking unauthorized privilege escalation. Following STIG guidelines ensures that these critical safeguards are in place from development through deployment.

• Mandatory baseline: STIG conformance is required for all DoD information systems.
• Comprehensive coverage: DISA regularly updates STIGs based on evolving threats, so the guidelines cover new technologies and attack vectors.
• Common threat mitigation: STIGs target widespread issues (input validation, authentication, data protection, etc.) to reduce the application’s attack surface.

By integrating STIGs, development teams apply military-grade best practices and reduce the risk of security breaches.

Automating DISA STIG Compliance

Manually verifying every DISA STIG rule in code is time consuming and error-prone. Automated static analysis tools can help by scanning source code to check against STIG requirements early in development. These tools can identify issues such as buffer overflows, unsafe APIs, tainted input, or missing access checks, that DISA STIG rules aim to prevent. For example, static code analysis can directly address ASD STIG requirements for buffer overflows, race conditions, and other critical flaws. Using static analysis in your development process means you can catch DISA STIG guideline violations immediately—before testing or deployment.

Polyspace Bug Finder for DISA STIG Compliance

Polyspace Bug Finder is a static code analysis tool that directly supports DISA STIG compliance. It automates the detection of security issues in C/C++ code and supports modifications that focus on STIG-related rules.

With Polyspace Bug Finder, developers can use provided STIG rule mapping to filter results and view only relevant violations. Alternatively, they can run Polyspace Bug Finder on the source code to identify a broader range of security issues. Polyspace Bug Finder automatically flags unsafe library calls, buffer overruns, unchecked inputs, and similar defects that correspond to STIG checks. By running Polyspace Bug Finder on the source code, teams quickly identify STIG violations with detailed diagnostics, and they can filter results to see only the findings related to DISA STIG rules.