CVE-2022-21676
January 12, 2022
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.
Affected Packages
engine.io (NPM):
Affected version(s) >=5.0.0 <5.2.1Fix Suggestion:
Update to version 5.2.1engine.io (NPM):
Affected version(s) >=4.0.0 <4.1.2Fix Suggestion:
Update to version 4.1.2engine.io (NPM):
Affected version(s) >=6.0.0 <6.1.1Fix Suggestion:
Update to version 6.1.1Related Resources (12)
Do you need more information?
Contact UsCVSS v4
Base Score:
8.7
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
NONE
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
7.5
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
CVSS v2
Base Score:
5.0
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
Weakness Type (CWE)
EPSS
Base Score:
4.1
