Pipeline Security Implementation
Software Supply Chain Security in CI/CD — Artifact Signing, SLSA Provenance, SBOM, and Admission Control
Software supply chain attacks target the pipeline — not the application. If an attacker can compromise your build process, inject a malicious dependency, or deploy an unsigned artifact, application-level security is irrelevant. Pipeline security is the foundation everything else depends on.
This engagement implements supply chain security controls directly in your CI/CD pipeline: artifact signing with cosign, SLSA Build Level 2-3 provenance generation, SBOM generation with attestation, dependency confusion protection, OIDC-based keyless authentication (eliminating long-lived signing keys), and deployment-time admission control using OPA Gatekeeper or Kyverno.
Supported CI/CD platforms include GitHub Actions, GitLab CI, Azure DevOps, AWS CodePipeline, Jenkins, and Tekton. The implementation is hands-on — working pipelines, not architecture documents.
Who This Is For
Ideal clients for this engagement.
The Problem
What this engagement addresses.
Build Pipeline as Attack Surface
CI/CD pipelines with long-lived credentials, unverified dependencies, and unsigned artifacts are the primary target for supply chain attacks. A compromised build produces compromised software — and nothing downstream can detect it without integrity verification.
Dependency Confusion and Typosquatting
Internal package names that shadow public registry names, or public packages with similar names to popular libraries, allow attackers to inject malicious code through the dependency resolution process itself.
SBOM Without Verification
Generating an SBOM checks a compliance box but provides no security value without attestation and verification. An SBOM that can be tampered with after generation is a liability, not a control.
No Deployment-Time Enforcement
Without admission control, any container image — signed or unsigned, provenance-verified or not — can be deployed to production. The integrity chain breaks at the last and most critical step.
Deliverables
What you receive.
Artifact Signing Implementation
cosign-based artifact signing integrated into CI/CD pipelines with OIDC keyless authentication. Eliminates long-lived signing keys. Verification configured at deployment time.
SLSA Provenance Generation
SLSA Build Level 2-3 provenance generation integrated into build pipelines. Provenance attestation tied to source repository, build configuration, and builder identity.
SBOM Generation & Attestation
Automated SBOM generation in CI/CD with cryptographic attestation. SBOM attached to artifacts and verifiable at deployment time. CycloneDX or SPDX format based on requirements.
Admission Control Policies
OPA Gatekeeper or Kyverno policies enforcing signature verification, provenance validation, and SBOM presence at deployment time. Policies tested and deployed with rollback procedures.
Dependency Confusion Protections
Registry configuration, namespace reservation, and dependency resolution hardening to prevent dependency confusion and typosquatting attacks.
Methodology
How the engagement works.
Assessment & Architecture
Weeks 1 – 2
- CI/CD platform and pipeline architecture review
- Current supply chain security posture assessment
- SLSA level gap analysis
- Implementation plan and sequencing
Core Implementation
Weeks 3 – 7
- Artifact signing with cosign and OIDC keyless auth
- SLSA Build L2-L3 provenance generation
- SBOM generation and attestation integration
- Dependency confusion protection configuration
Admission Control & Enforcement
Weeks 6 – 9
- OPA Gatekeeper or Kyverno policy development
- Signature and provenance verification at deployment
- Policy testing in audit mode before enforcement
- Gradual enforcement rollout with rollback procedures
Validation & Handoff
Weeks 9 – 10
- End-to-end supply chain integrity verification
- Runbook and operational documentation delivery
- Team training on signing, verification, and policy management
- Knowledge transfer and handoff
Engagement Tiers
Scoped to your architecture.
Foundation
Single CI/CD platform, single deployment target. Artifact signing, SBOM generation, and basic admission control. SLSA Build L2.
- Artifact signing with cosign (OIDC keyless)
- SBOM generation with attestation
- Basic admission control (signature verification)
- SLSA Build Level 2 provenance
Standard
Single CI/CD platform with full supply chain implementation. SLSA Build L2-L3, comprehensive admission control, and dependency confusion protection.
- Everything in Foundation
- SLSA Build Level 3 provenance
- Dependency confusion protection
- Comprehensive admission control policies (Gatekeeper/Kyverno)
Enterprise
Multi-platform or multi-cluster implementation. Cross-environment policy consistency, centralized verification infrastructure, and advanced policy development.
- Everything in Standard
- Multi-platform CI/CD support
- Cross-cluster admission control consistency
- Centralized policy management and monitoring
Prerequisites
- CI/CD platform access (GitHub Actions, GitLab CI, Azure DevOps, AWS CodePipeline, Jenkins, or Tekton)
- Container registry access for signed artifact storage
- Kubernetes cluster access for admission control deployment (if applicable)
- OIDC identity provider for keyless signing (GitHub, GitLab, or cloud provider)
Frequently Asked Questions
Common questions.
Which CI/CD platforms do you support?
GitHub Actions, GitLab CI, Azure DevOps, AWS CodePipeline, Jenkins, and Tekton. The implementation approach adapts to each platform's capabilities — for example, GitHub Actions has native OIDC support for keyless signing, while Jenkins requires additional configuration.
Do we need Kubernetes for admission control?
Admission control with OPA Gatekeeper or Kyverno requires Kubernetes. If you deploy to other targets, the engagement focuses on pre-deployment verification in the CI/CD pipeline itself — signature and provenance checks before deployment rather than at admission time.
What is OIDC keyless signing and why does it matter?
Traditional artifact signing requires long-lived signing keys that must be stored, rotated, and protected. OIDC keyless signing (via Sigstore/cosign) uses short-lived certificates tied to your CI/CD platform's identity — no keys to manage, rotate, or leak. It eliminates an entire class of key management operational burden and risk.
Related Offerings
Often paired with this engagement.
Software Supply Chain Security
Governance layer that complements pipeline implementation — dependency risk policy, SBOM program, and supplier security assessment framework.
Secure Code Review
Review the application code that the pipeline builds — secure pipelines building insecure code still produce vulnerable software.
AppSec Program Design
Integrate pipeline security into your broader AppSec program — security gates, tooling architecture, and governance.
Ready to discuss this engagement?
30-minute discovery call. We will discuss your application architecture, your specific concerns, and whether this assessment is the right fit.