CVE Vulnerabilities

CVE-2023-2850

Missing Origin Validation in WebSockets

Published: Jul 25, 2023 | Modified: Nov 21, 2024
CVSS 3.x
4.7
MEDIUM
Source:
NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:N/A:N
CVSS 2.x
RedHat/V2
RedHat/V3
Ubuntu

NodeBB is affected by a Cross-Site WebSocket Hijacking vulnerability due to missing validation of the request origin. Exploitation of this vulnerability allows certain user information to be extracted by attacker.

Weakness

The product uses a WebSocket, but it does not properly verify that the source of data or communication is valid.

Affected Software

Name Vendor Start Version End Version
Nodebb Nodebb * 2.8.13 (excluding)
Nodebb Nodebb 3.0.0 (including) 3.1.3 (excluding)

Extended Description

WebSockets provide a bi-directional low latency communication (near real-time) between a client and a server. WebSockets are different than HTTP in that the connections are long-lived, as the channel will remain open until the client or the server is ready to send the message, whereas in HTTP, once the response occurs (which typically happens immediately), the transaction completes. A WebSocket can leverage the existing HTTP protocol over ports 80 and 443, but it is not limited to HTTP. WebSockets can make cross-origin requests that are not restricted by browser-based protection mechanisms such as the Same Origin Policy (SOP) or Cross-Origin Resource Sharing (CORS). Without explicit origin validation, this makes CSRF attacks more powerful.

Potential Mitigations

References