The way build artifacts are stored by the GitHub Actions platform could enable attackers to inject malicious code into software projects with CI/CD (continuous integration and continuous delivery) workflows that don’t perform sufficient filtering when downloading artifacts. Cybersecurity researchers have identified several popular artifacts download scripts used by thousands of repositories that are vulnerable to this issue.
“We have discovered that when transferring artifacts between different workflows, there is a major risk for artifact poisoning — a technique in which attackers replace the content of a legitimate artifact with a modified malicious one and thereby initiate a supply chain attack,” researchers from supply chain security firm Legit Security said in an analysis of the issue.
