#VU77595 Improper access control in Node.js - CVE-2023-30587

Vulnerability identifier: #VU77595

Vulnerability risk: Medium

CVSSv4.0: 1.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2023-30587

CWE-ID: CWE-284

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Node.js
Server applications / Web servers

Vendor: Node.js Foundation

Description

The vulnerability allows a remote user to gain unauthorized access to otherwise restricted functionality.

The vulnerability exists due to improper access restrictions. A remote user can exploit the Worker class's ability to create an "internal worker" with the kIsInternal Symbol to bypass restrictions set by the --experimental-permission flag using the built-in inspector module (node:inspector).

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Node.js: 20.0.0, 20.1.0, 20.2.0, 20.3.0

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External links
https://nodejs.org/en/blog/vulnerability/june-2023-security-releases

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.