A vulnerability exists in the HCI IEC 60870-5-104 that affects the RTU500 series product versions listed below. Incomplete or wrong received APDU frame layout may cause blocking on link layer. Error reason was an endless blocking when reading incoming frames on link layer with wrong length information of APDU or delayed reception of data octets.

Only communication link of affected HCI IEC 60870-5-104 is blocked. If attack sequence stops the communication to the previously attacked link gets normal again.

A vulnerability exists in the HCI IEC 60870-5-104 that affects the RTU500 series product versions listed below. Incomplete or wrong received APDU frame layout may cause blocking on link layer. Error reason was an endless blocking when reading incoming frames on link layer with wrong length information of APDU or delayed reception of data octets.

Only communication link of affected HCI IEC 60870-5-104 is blocked. If attack sequence stops the communication to the previously attacked link gets normal again.

Hitachi Energy is aware of the vulnerabilities CVE-2023-5767, CVE-2023-5768 and CVE-2023-5769 in the Web server and HCI IEC 60870-5-104 component, that affects the RTU500 versions that are listed below. An at- tacker successfully exploiting these vulnerabilities could perform cross-site scripting on web server or denial of service on HCI IEC 60870-5-104. Please refer to the Recommended Immediate Actions for information about the available mitigation/remediation strategies.

Ein entfernter Angreifer kann mehrere Schwachstellen in Hitachi Energy RTU500 ausnutzen, um einen Cross-Site-Scripting-Angriff zu starten oder einen Denial-of-Service-Zustand zu verursachen.