Static Application Security Testing: Why 50% of Vulnerabilities Start in Source Code

The 50% Problem

Half of all security defects are introduced at the source code level. Not in configuration, not in deployment, not in network architecture, in the code itself. Buffer overflows, SQL injection, null pointer dereferences, improper input validation, and race conditions are all defects that developers write into their software, often without realizing it.

The economics are stark: fixing a vulnerability during development costs orders of magnitude less than fixing it after deployment. For Indian companies building medical devices for US FDA submission, telecom infrastructure for 5G rollout, or automotive ECUs for European OEMs, a post-deployment vulnerability can mean product recalls, regulatory penalties, or exclusion from markets.

What Is SAST?

Static Application Security Testing (SAST) analyzes source code without executing it, scanning every path, tracing every data flow, and mapping every variable to detect vulnerabilities against known weakness taxonomies.

SAST is the shift-left foundation, it catches defects at the earliest possible point, when they are cheapest to fix.

Standards SAST Enforces

Klocwork 2025.4: What’s New

Klocwork is Perforce’s enterprise SAST engine, supporting C, C++, C#, Rust, Java, JavaScript, Python, and Kotlin. The 2025.4 release introduces:

• AI-assisted code remediation in VS Code, context-aware fix suggestions with human-in-the-loop approval
• Complete MISRA C:2023 coverage for C90/C99 with improved C11/C18 enforcement
• Clang 20 integration for more accurate code parsing

Earlier 2025 releases added the CWE 2024 Top 25 and DISA STIG v6 taxonomies, which Perforce lists under Klocwork 2025.1. Klocwork’s TÜV SÜD certified tool qualification for ISO 26262 (to ASIL D) and IEC 61508 (to SIL 4) is a standing product attribute rather than a feature of any one release.

Indian Use Cases

• Telecom infrastructure: 5G base station software, router firmware, and network management platforms require IEC 62443 compliance. SAST catches vulnerabilities in C/C++ control plane code before deployment.
• Medical device exports: Indian manufacturers exporting cardiac monitors, infusion pumps, and diagnostic equipment to the US and EU need CWE and CERT compliance for FDA 510(k) and CE marking.
• Automotive ECUs: ADAS, battery management, and motor controller firmware require MISRA + CERT compliance for ISO 26262 and ISO/SAE 21434.
• Defense and government: Indian defence R&D and electronics projects require DISA STIG compliance for secure embedded systems.
• Fintech: RBI cybersecurity mandates drive adoption of OWASP and CERT scanning for banking APIs and payment processing software.

Try Klocwork

Perforce offers a 7-day Klocwork trial, scan your codebase, see the vulnerabilities, and evaluate AI-assisted remediation on your own code. GSAS provides trial setup assistance, results interpretation, and deployment consulting.

For a comprehensive overview of SAST methodology, visit Perforce’s SAST Resource Center.

Request a 7-day Klocwork trial through GSAS →