#VU76616 Uncaught Exception in engine.io - CVE-2023-31125

Vulnerability identifier: #VU76616

Vulnerability risk: Low

CVSSv4.0: 4.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2023-31125

CWE-ID: CWE-248

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
engine.io
Other software / Other software solutions

Vendor: socket.io

Description

The vulnerability allows a remote user to perform denial of service attacks.

The vulnerability exists due to an uncaught exception. A remote user can send specially crafted HTTP request to trigger the vulnerability and perform denial of service attacks.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

engine.io: 5.1.0 - 6.4.1

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External links
https://github.com/socketio/engine.io/releases/tag/6.4.2
https://github.com/socketio/engine.io/commit/fc480b4f305e16fe5972cf337d055e598372dc44
https://github.com/socketio/engine.io/security/advisories/GHSA-q9mw-68c2-j6m5

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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.