CVE-2023-39333: Code injection via WebAssembly export names

Maliciously crafted export names in an imported WebAssembly module can inject JavaScript code. The injected code may be able to access data and functions that the WebAssembly module itself does not have access to, similar to as if the WebAssembly module was a JavaScript module.

References: https://nodejs.org/en/blog/vulnerability/october-2023-security-releases

— Red Hat

Maliciously crafted export names in an imported WebAssembly module can inject JavaScript code. The injected code may be able to access data and functions that the WebAssembly module itself does not have access to, similar to as if the WebAssembly module was a JavaScript module.

Thanks to dittyroma for reporting the issue and to Tobias Nießen for fixing it.

— Node.Js

Maliciously crafted export names in an imported WebAssembly module can inject JavaScript code. The injected code may be able to access data and functions that the WebAssembly module itself does not have access to, similar to as if the WebAssembly module was a JavaScript module.

This vulnerability affects users of any active release line of Node.js. The vulnerable feature is only available if Node.js is started with the --experimental-wasm-modules command line option.

— MITRE

Node.js could allow a remote attacker to gain unauthorized access to the system, caused by a code injection flaw. By using specially crafted export names in an imported WebAssembly module, an attacker could exploit this vulnerability to inject JavaScript code and gain access to restricted data and functions.

— IBM