The permission model protects itself against path traversal attacks by calling path.resolve() on any paths given by the user.
If the path is to be treated as a Buffer, the implementation uses Buffer.from() to obtain a Buffer from the result of path.resolve().
By monkey-patching Buffer internals, namely, Buffer.prototype.utf8Write, the application can modify the result of path.resolve(), which leads to a path traversal vulnerability.
Impacts:
Please note that at the time this CVE was issued, the permission model is an experimental feature of Node.js.
Thank you, to Tobias Nießen for reporting this vulnerability and for fixing it.
This Cyber News was published on www.tenable.com. Publication date: Thu, 15 Feb 2024 04:46:04 +0000