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dCTF 2021: Leak Spin and DevOps vs SecOps

Finding two dCTF flags through GitHub pages, branches, and GitHub Actions artifacts.

Original challenge writeup: Leak Spin && Devops vs Secops.md

These two challenges went together.

I do not have the original challenge descriptions anymore because I wrote this after the CTF ended. I only remember that both descriptions were short and did not give much away.

I found the first thread while working on Injection:

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That pointed to a GitHub page:

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That was enough for Leak Spin:

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DevOps vs SecOps

This one was also hidden in their GitHub page:

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It was just tucked away a little deeper.

First, I had to switch to the devops branch:

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Then I opened the Actions tab:

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From there, I went through Create ctfd.yml and found the flag:

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