Potential AWS critical vulnerability about actions2aws

[aidansteele]

Hi @wparad, sorry I didn't see this until just now. I'm not sure I understand the threat - can you please demonstrate? I have an endpoint deployed at https://a0gy7ozvrj.execute-api.us-east-1.amazonaws.com/ with account ID 304520749683. Can you share the access key ID (i.e. the string beginning ASIA...) that you are able to retrieve?

(It's worth noting that this repo shouldn't be used anyway now that GitHub can issue OIDC tokens, but I'm still very curious to understand the vulnerability you describe)

[wparad]

Nope, I was totally wrong.

Initiall I thought it exposed the same vulnerability that https://www.vaultproject.io/docs/auth/github has, but it doesn't

All that are doing here, is same way all encrypted messages are sent usually, providing a public key, and having the service pull that and encrypt the credentials with it before sending it back. I was initially thinking that the either public key or the github token from the runner were being sent in the request, but since the service is pulling all this data, the only vulnerability here is DDoS on your endpoint.

That is my bad, I shouldn't have opened this.