Versions of the package asyncua before 0.9.96 is vulnerable to Denial of Service (DoS) such that an attacker can send a malformed packet and as a result, the server will enter into an infinite loop and consume excessive memory.
Versions of the package asyncua before 0.9.96 is vulnerable to Improper Authentication such that it is possible to access Address Space without encryption and authentication. Note: This issue is a result of missing checks for services that require an active session.
All versions of package opcua; all versions of package asyncua is vulnerable to Denial of Service (DoS) due to a missing limitation on the number of received chunks - per single session or in total for all concurrent sessions. An attacker can exploit this vulnerability by sending an unlimited number of huge chunks (e.g. 2GB each) without sending the Final closing chunk.