Open source software is everywhere, even in the most critical systems. It powers tools, services, applications, and infrastructure across the globe. While it offers innovation at warp speed, it also introduces risks, particularly in the supply chain. Software engineers and managers must understand one crucial question: how can we ensure the security of open source dependencies without sacrificing results?
This blog dives into the key strategies for securing open source model supply chains, the risks to be aware of, and practical steps to make improvements.
Understanding the Open Source Software Supply Chain
The open source supply chain includes every dependency, library, framework, and package that your application relies on, from direct imports to transient dependencies. Each link in this chain must be vetted and monitored, as vulnerabilities in any component can become an entry point for attackers.
With the explosion of machine learning models and AI-driven applications, the inclusion of pre-trained models from open source libraries or frameworks adds another layer of complexity. These models often depend on open repositories for training data, weights, or configurations. While they speed up deployments, they also demand new practices for full-stack security.
What Risks Exist in the Model Supply Chain?
1. Dependency Vulnerabilities
Known vulnerabilities in libraries can go unnoticed during development, especially in deep dependency trees. Attackers target these weaknesses, leveraging them to inject malicious code into systems. One example is the rise of typosquatting attacks on popular package management systems.
2. Malicious Package Injections
Threat actors have begun to plant seemingly benign packages in public repositories like PyPI, npm, or Maven. These packages can execute harmful operations when installed, such as leaking secrets or creating backdoors.
3. Model Integrity Issues
Pre-trained models need validation. Without proper verification methods, it's possible to inadvertently incorporate poisoned models that manipulate outcomes or expose systems to bias.
4. Supply Chain Attacks
A supply chain attack occurs when the compromise happens upstream in a repository, CI/CD pipeline, or deployment tool. Attackers exploit weaknesses in these links to spread malware downstream to users.
Strategies to Secure Open Source Model Supply Chains
1. Evaluate Dependencies Proactively
Regularly audit dependencies at all levels—direct, transient, and developmental. Use tools built for vulnerability scanning and dependency health tracking to stay informed about updates and patches for open source libraries.
2. Verify Model Sources
Always verify the origin of pre-trained machine learning models. Check hash values, compare checksums, and validate signatures where available. Documentation and peer reviews can also add levels of confidence about the code integrity.
3. Embrace Security Standards Like SBOM
A Software Bill of Materials (SBOM) provides visibility into all the components in your software stack. It allows you to trace where each dependency, model, or library originates and identify potential areas of exposure.
4. Use Continuous Monitoring for Exposure
Security doesn’t stop after deployment. Continuously monitor your systems for new vulnerabilities in libraries, models, or workflows. Any time a new CVE (Common Vulnerabilities and Exposures) gets published, assess its impact on your stack immediately.
5. Implement Isolation with Sandboxed Environments
Isolate untrusted dependencies and unverified models in sandboxed environments. This ensures that even in cases of compromise, the blast radius remains confined, reducing overall damage.
Building Confidence in Open Source Supply Chains
Open source offers incredible opportunities, but successfully navigating its supply chain requires vigilance. Boosting visibility, automating monitoring, and validating every component in your stack will minimize risks. By making security a first-class concern from the very beginning, teams can innovate without increasing exposure.
If you want to see how security practices work in action or want better visibility into your software bill of materials, try Hoop.dev now. In just minutes, you can explore live systems and take control of your supply chain security.