#VU72404 Incorrect Regular Expression in undici - CVE-2023-24807

Vulnerability identifier: #VU72404

Vulnerability risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2023-24807

CWE-ID: CWE-185

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
undici
Server applications / File servers (FTP/HTTP)

Vendor: Node.js

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient input validation when user-supplied input within the `Headers.set()` and `Headers.append()` methods. A remote attacker can pass specially crafted data to the application and perform regular expression denial of service (ReDos) attack.

Mitigation
Install update from vendor's website.

Vulnerable software versions

undici: 1.0.0 - 5.19.0

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External links
https://github.com/nodejs/undici/releases/tag/v5.19.1
https://github.com/nodejs/undici/security/advisories/GHSA-r6ch-mqf9-qc9w
https://hackerone.com/bugs?report_id=1784449
https://github.com/nodejs/undici/commit/f2324e549943f0b0937b09fb1c0c16cc7c93abdf

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

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