ci: pin HashiCorp custom Actions to full commit SHAs to prevent supply-chain attacks#13660
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Summary
build.ymlandcreate-release-branch.ymlreference HashiCorp's own GitHub Actions using mutable version tags and a branch reference (@v1,@v2,@main). Even first-party actions in separate repositories should be pinned — a compromised signing key or a supply-chain incident in any of thehashicorp/actions-*repos would immediately affect Packer's build and release pipelines.The
build.ymlworkflow generates release artifacts for multiple platforms (Linux, macOS, Windows) and Docker images, making it a high-value target.Actions pinned
hashicorp/actions-set-product-version@v1@e2c49d61aff17b1280ddfe7bb031331d02ca0140hashicorp/actions-generate-metadata@main@a43468dfb100445f2c2aa52cdc3d57b2c982a0f3hashicorp/actions-go-build@v1@dd7ca5a30c402c933e1fe61e0ff7165e5c4ee9e4hashicorp/actions-packaging-linux@v1@006298649be64cee63e7f94a54dfcf3e14766bf6hashicorp/actions-docker-build@v2@e12557abf02a40557313ab2839d6cd2c6705261ehashicorp/actions-create-release-branch@v1@96a01e83eb1055a66f2097029b50801ff926fea3Vulnerability class
Supply-chain attack via mutable Action tag/branch references (CWE-829).