ReDos in Momentjs Luxon

1) Incorrect Regular Expression

EUVDB-ID: #VU72033

Risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-22467

CWE-ID: CWE-185 - Incorrect Regular Expression

Exploit availability: No

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 - 3.2.0

External links

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

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.