A flaw was found in Undertow. A remote attacker can cause Out of Memory on websockets endpoint without authentication on any @ServerEndpoint class that has any @OnMessage method. This allows an attacker to cause Denial of Service attack without authentication and using only a standard WebSocket handshake.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
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 v3.1
Weakness Type (CWE)
Vulnerable Products
red hat:red hat single sign-on 7
red hat:red hat jboss enterprise application platform expansion pack
red hat:red hat fuse 7
red hat:red hat build of apache camel for spring boot 4
red hat:red hat data grid 8
red hat:red hat jboss enterprise application platform 7
red hat:red hat jboss enterprise application platform 8