CVE-2023-51661 — Vulnerability in wasmer-cli — CVE Details

### Summary As of Wasmer version v4.2.3, Wasm programs can access the filesystem outside of the sandbox. ### Details https://github.com/wasmerio/wasmer/issues/4267 ### PoC A minimal Rust program: ``` fn main() { let f = std::fs::OpenOptions::new() .write(true) .create_new(true) .open("abc") .unwrap(); } ``` This should be compiled with `cargo build --target wasm32-wasi`. The compiled program, when run with wasmer WITHOUT `--dir`, can still create a file in the working directory. ### Impact Service providers running untrusted Wasm code on Wasmer can unexpectedly expose the host filesystem.