CVE-2024-36137: fs.fchown/fchmod bypasses permission model

A vulnerability has been identified in Node.js, affecting users of the experimental permission model when the --allow-fs-write flag is used.

Node.js Permission Model do not operate on file descriptors, however, operations such as fs.fchown or fs.fchmod can use a "read-only" file descriptor to change the owner and permissions of a file.

Please note that at the time this CVE was issued, the permission model is an experimental feature of Node.js.

— Node.Js

A vulnerability has been identified in Node.js, affecting users of the experimental permission model when the --allow-fs-write flag is used.

Node.js Permission Model do not operate on file descriptors, however, operations such as fs.fchown or fs.fchmod can use a "read-only" file descriptor to change the owner and permissions of a file.

This vulnerability affects all users using the experimental permission model in Node.js 20 and Node.js 22.

— Red Hat

Node.js could allow a remote attacker to bypass security restrictions, caused by an error when the --allow-fs-write flag is used. An attacker could exploit this vulnerability using a "read-only" file descriptor to change the owner and permissions of a file.

— IBM