Tauri's readDir Endpoint Scope can be Bypassed With Symbolic Links

Impact

Due to missing canonicalization when readDir is called recursively, it was possible to display directory listings outside of the defined fs scope. This required a crafted symbolic link or junction folder inside an allowed path of the fs scope. No arbitrary file content could be leaked.

Patches

The issue has been resolved in https://github.com/tauri-apps/tauri/pull/5123 and the implementation now properly checks if the requested (sub) directory is a symbolic link outside of the defined scope.

Workarounds

Disable the readDir endpoint in the allowlist inside the tauri.conf.json.

For more information

This issue was initially reported by martin-ocasek in #4882.

If you have any questions or comments about this advisory:

• Open an issue in tauri
• Email us at [email protected]