CVE-2023-5768 (published 2023-12-04T14:33:47.898Z)
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.


Affected products: Vendor: Hitachi Energy
Product: RTU500 series
Versions: RTU500 series CMU Firmware version 12.0.1 – 12.0.14, RTU500 series CMU Firmware version 12.2.1 – 12.2.11, RTU500 series CMU Firmware version 12.4.1 – 12.4.11 , RTU500 series CMU Firmware version 12.6.1 – 12.6.9 , RTU500 series CMU Firmware version 12.7.1 – 12.7.6, RTU500 series CMU Firmware version 13.2.1 – 13.2.6 , RTU500 series CMU Firmware version 13.4.1 – 13.4.3