DevSecOps - Security in the Development Pipeline
About 2 min read
DevSecOps is an approach that unifies software development (Dev), security (Sec), and operations (Ops), embedding security into every stage of the development lifecycle. Traditionally, the dominant model was a "gatekeeper" style in which the security team inspected the product just before release, but DevSecOps automatically runs security checks at each phase of design, coding, testing, and deployment. It is a concept built on two pillars: the cultural shift that "security is everyone's responsibility" and the integration of tools into the CI/CD pipeline.
Evolution from DevOps
DevOps removed the wall between development and operations and dramatically increased release velocity. However, the faster the pace, the more security reviews became a bottleneck - a new challenge emerged. In an environment that deploys several times a week, inserting a manual security review for every release is not realistic. The concept of "shift left" was born to solve this problem.
Shift left means moving security verification to the "left side" (earlier stages) of the development process. The earlier a problem is found, the lower the cost of fixing it, and it significantly reduces the risk of a critical vulnerability being discovered just before release and causing rework.
Integrating Security into the CI/CD Pipeline
In the practice of DevSecOps, security tools are embedded into each stage of the CI/CD pipeline. The mechanism runs security checks automatically simply when a developer pushes code, without requiring any special action.
The Difference Between SAST, DAST, and SCA
Analyzes source code or bytecode without executing it. It detects secure coding violations and patterns of SQL injection and XSS. It can be run from the early stages of development, but tends to produce many false positives.
Simulates attacks from the outside against a running application. It can discover vulnerabilities that are actually exploitable, but cannot pinpoint the location in the source code. It is commonly run in a staging environment.
Detects known vulnerabilities and license violations in dependency libraries. Its importance has surged as a countermeasure against supply chain attacks. npm audit, Dependabot, and Snyk are representative examples.
Relationship with SBOM
An SBOM (Software Bill of Materials) is a complete inventory of all components contained in a piece of software. Triggered by U.S. Executive Order 14028 of 2021, the trend toward mandating SBOM provision for government-procured software accelerated. In a DevSecOps pipeline, the SBOM is automatically generated at build time and, in coordination with SCA tools, vulnerable components are identified instantly. From a compliance perspective as well, the SBOM is an important asset that speeds up identifying the scope of impact when an incident occurs.
The Role of the Security Champion
The success of DevSecOps requires not only the adoption of tools but also a transformation of organizational culture. A security champion is a security point of contact placed within each development team. Rather than a dedicated security engineer, it is a developer who acquires security knowledge and serves as the team's in-house advisor.
"After placing one security champion in each team, inquiries to the security team dropped by 40% and the speed of fixing vulnerabilities improved threefold. The biggest change was that developers themselves came to regard security as their own concern."
Building security checks from a security perspective into the code review stage is also an important role of the champion. Building a security framework for a startup is explained in the startup security checklist, and open-source security auditing is explained in the open-source security audit. For the realities of supply chain attacks, also refer to the explanation of supply chain attacks.DevSecOps books on Amazon will let you learn even more deeply.
Common Misconceptions
The most common misconception is that "DevSecOps is complete once you adopt the tools." Even if you embed SAST and DAST into CI/CD, without a culture and process for fixing the detected vulnerabilities, the alerts will simply be ignored. The notion that "DevSecOps is the security team's job" is also mistaken; the essence lies precisely in a structure where developers, operators, and security personnel collaborate as three parties. Blending security into the development process as "part of quality" is the ideal that DevSecOps aims for.
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