Nicholas Meier

**Name of the Vulnerable Software and Affected Versions** No specific software or versions are mentioned in the provided descriptions. **Description** The issue concerns a session hijacking attack targeting the application layer's control mechanism. This mechanism manages authenticated sessions between a host PC and a Programmable Logic Controller (PLC). During these sessions, a session key is used for security. However, if an attacker captures this session key, they can inject traffic into an ongoing authenticated session. To achieve this, the attacker must also spoof both the IP address and the MAC address of the originating host, which is typical of session-based attacks. **Recommendations** At the moment, there is no information about a newer version that contains a fix for this vulnerability.

**Name of the Vulnerable Software and Affected Versions** H2-DM1E PLC (affected versions not specified) **Description** The H2-DM1E PLC's authentication protocol appears to utilize either a custom encoding scheme or a challenge-response protocol. However, there's an observed anomaly in the H2-DM1E PLC's protocol execution, namely its acceptance of multiple distinct packets as valid authentication responses. This behavior deviates from standard security practices where a single, specific response or encoding pattern is expected for successful authentication. **Recommendations** At the moment, there is no information about a newer version that contains a fix for this vulnerability.