(Pwn2Own) Prosys OPC UA Simulation Server OpenSecureChannel Resource Exhaustion Denial-of-Service Vulnerability
Vulnerability Details
This vulnerability allows remote attackers to create a denial-of-service condition on affected installations of Prosys OPC UA Simulation Server. Authentication is not required to exploit this vulnerability.
The specific flaw exists within the handling of OpenSecureChannel messages. By sending a large number of requests, an attacker can consume all available resources on the server. An attacker can leverage this vulnerability to create a denial-of-service condition on the system.
Additional Details
Prosys OPC has issued an update to correct this vulnerability. More details can be found at:
https://www.prosysopc.com/blog/pwn2own-2023-resource-exhaustion-exploit/
Disclosure Timeline
- 2023-02-22 - Vulnerability reported to vendor
- 2023-05-31 - Coordinated public release of advisory
Credit
Claroty Research - Team82 - Uri Katz, Noam Moshe, Vera Mens, Sharon Brizinov
