CVE-2022-24900 – Absolute Path Traversal due to incorrect use of `send_file` call in Piano LED Visualizer

https://notcve.org/view.php?id=CVE-2022-24900

Piano LED Visualizer is software that allows LED lights to light up as a person plays a piano connected to a computer. Version 1.3 and prior are vulnerable to a path traversal attack. The `os.path.join` call is unsafe for use with untrusted input. When the `os.path.join` call encounters an absolute path, it ignores all the parameters it has encountered till that point and starts working with the new absolute path. Since the "malicious" parameter represents an absolute path, the result of `os.path.join` ignores the static directory completely. • https://github.com/onlaj/Piano-LED-Visualizer/blob/6a732caa812c83a807c711f3d091af99209cae7b/webinterface/views_api.py#L970 https://github.com/onlaj/Piano-LED-Visualizer/commit/3f10602323cd8184e1c69a76b815655597bf0ee5 https://github.com/onlaj/Piano-LED-Visualizer/issues/350 https://github.com/onlaj/Piano-LED-Visualizer/pull/351 https://github.com/onlaj/Piano-LED-Visualizer/security/advisories/GHSA-g78x-q3x8-r6m4 • CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') CWE-73: External Control of File Name or Path CWE-668: Exposure of Resource to Wrong Sphere •