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GitHub RCE by Environment variable injection Bug Bounty writeup | |
Disclaimer: I'll keep this really short but I hope you'll get the key points. | |
GitHub blogged a while ago about some internal tool called gerve: | |
https://github.com/blog/530-how-we-made-github-fast | |
Upon git+sshing to github.com gerve basically looks up your permission | |
on the repo you want to interact with. Then it bounces you further in | |
another forced SSH session to the back end where the repo actually is. |