CVE-2022-21676 Information

Description

Engine.IO is the implementation of transport-based cross-browser/cross-device bi-directional communication layer for Socket.IO. A specially crafted HTTP request can trigger an uncaught exception on the Engine.IO server thus killing the Node.js process. This impacts all the users of the engine.io package starting from version 4.0.0 including those who uses depending packages like socket.io. Versions prior to 4.0.0 are not impacted. A fix has been released for each major branch namely 4.1.2 for the 4.x.x branch 5.2.1 for the 5.x.x branch and 6.1.1 for the 6.x.x branch. There is no known workaround except upgrading to a safe version.

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Reference

https://github.com/socketio/engine.io/security/advisories/GHSA-273r-mgr4-v34f https://github.com/socketio/engine.io/commit/c0e194d44933bd83bf9a4b126fca68ba7bf5098c https://github.com/socketio/engine.io/commit/66f889fc1d966bf5bfa0de1939069153643874ab https://github.com/socketio/engine.io/commit/a70800d7e96da32f6e6622804ef659ebc58659db https://github.com/socketio/engine.io/releases/tag/6.1.1 https://github.com/socketio/engine.io/releases/tag/5.2.1 https://github.com/socketio/engine.io/releases/tag/4.1.2

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

NONE

Base Score

HIGH

Base Severity

7.5