#VU72033 Incorrect Regular Expression in Luxon - CVE-2023-22467

Vulnerability identifier: #VU72033

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-2023-22467

CWE-ID: CWE-185

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Luxon
Web applications / JS libraries

Vendor: Moment.js

Description

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

The vulnerability exists due to an incorrect regular expression when parsing untrusted input within the Luxon's DateTime.fromRFC2822() function. A remote attacker can causes a noticeable slowdown for inputs with lengths above 10k characters.

Note, this is the same vulnerability as #VU65835 (CVE-2022-31129) reported earlier for moment.js.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Luxon: 1.0.0 - 1.28.0, 2.0.0 - 2.5.1, 3.0.0 - 3.2.0

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External links
https://github.com/moment/luxon/commit/5ab3bf64a10da929a437629cdb2f059bb83212bf
https://github.com/moment/luxon/security/advisories/GHSA-3xq5-wjfh-ppjc

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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.