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# System prepended metadata

title: Proof of Concepts

---

# Proof of Concepts

## Opening a shell in bcdnsd
in order to open a shell in BCDNSD a manager needs to enter this command into their terminal. This will open a subshell in the BCDNSD terminal. This shell will run commands that the mannager passes.
``` bash
./dnsmgr add "'; sh;'"
```
Here is an example of the output in the BCDNSD terminal would look like if the attacker passed an echo "hello" commands along with the shell command.
![](https://i.imgur.com/ksNPuC9.png)
