"If you implement boundaries and nobody is around to push them, do they even exist?". Have you ever wondered how your sandbox looks like from the inside? Tempted to test if you can escape it, if only you had a shell to give it a try? boxxy is a library that can be linked into a debug build of an existing program and drop you into an interactive shell. From there you can step through various stages of your sandbox and verify it actually contains™.
cargo run --example boxxy
Just put a dev-dependencies in your Cargo.toml and copy examples/boxxy.rs to
your examples/ folder. Modify to include your sandbox.
[dev-dependencies]
boxxy = "*"
There is an example program, check the Makefile to see how it's built.
make cboxxy
There are vulnerable sandboxes (examples/vuln-*) as a challenge that can be
exploited using the boxxy shell (no need to compile any exploits).
DO NOT POST SPOILERS
Start a challenge using eg. cargo run --example vuln-chroot
The shell is a basic interface for human input, do not write actual scripts, there be dragons.
Do not include boxxy in production builds.
This project is free software released under the LGPL3+ license.