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February 05, 2023

GitHub fine-grained PATs for CDK Pipelines

by John Lukach

GitHub fine-grained personal access tokens (PATs) may only be available in beta, but the pros outweigh the cons for reducing the risk from the classic PATs blast radius.

1-fine-grained-pat.png

CDK Pipelines requires the token must be stored in an AWS Secret Manager (ASM) secret called github-token.

2-new-fine-grained-pat.png

Instead of having access to all repositories, the token can be scoped to a specific code base.

3-fine-grained-repository-access.png

Initial CDK Pipeline setup only requires Metadata and Webhook permissions.

4-fine-grained-access.png

While the user interface (UI) says the token can live forever, it must be configured to expire in one year.

5-fine-grained-ttl.png

When adding permissions, the UI has inconsistent names for deploying additional resources, where these are my starting point. I may be able to reduce these more in the future.

6-fine-grained-ui.png

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tags: AWS - CDK - GitHub - Pipelines - PATs