Socket.IO is an open source, real-time, bidirectional, event-based, communication framework. Prior to versions 3.3.5, 3.4.4, and 4.2.6, a specially crafted Socket.IO packet can make the server wait for a large number of binary attachments and buffer them, which can be exploited to make the server run out of memory. This issue has been patched in versions 3.3.5, 3.4.4, and 4.2.6.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Attack Requirements
None
No additional conditions
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
None
No data leak
Integrity
None
No data modification
Availability
High
Complete denial of service
CVSS Vector v4.0
Weakness Type (CWE)
References 4
https://github.com/socketio/socket.io/commit/719f9ebab0772ffb882bd614b387e585c1…
security-advisories@github.com
https://github.com/socketio/socket.io/commit/9d39f1f080510f036782f2177fac701cc0…
security-advisories@github.com
https://github.com/socketio/socket.io/commit/b25738c416c4e32fbff62ee182afa8f6d0…
security-advisories@github.com
https://github.com/socketio/socket.io/security/advisories/GHSA-677m-j7p3-52f9
security-advisories@github.com