Vulnerability identifier: #VU72403

Vulnerability risk: Medium

CVSSv3.1: 5.3 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-23936

CWE-ID: CWE-113

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 HTTP splitting attacks.

The vulnerability exists due to software does not correctly process CRLF character sequences when handling HTTP "Host" header. A remote attacker can send specially crafted request containing CRLF sequence and make the application to send a split HTTP response.

Successful exploitation of the vulnerability may allow an attacker perform cache poisoning attack.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

undici: 1.0.0 - 5.19.0

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External links
http://github.com/nodejs/undici/releases/tag/v5.19.1
http://github.com/nodejs/undici/commit/a2eff05401358f6595138df963837c24348f2034
http://github.com/nodejs/undici/security/advisories/GHSA-5r9g-qh6m-jxff
http://hackerone.com/reports/1820955

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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.