MODBUS/TCP 'Return Query Data' Function Code Detection

Info Nessus Network Monitor Plugin ID 7099

Synopsis

The MODBUS/TCP client has sent a MODBUS server a Return Query Data request.

Description

The MODBUS/TCP client has sent a MODBUS server a Return Query Data request. The Return Query Data request, function code 8 (0x08) and subfunction code 0 (0x00), will cause the target server to echo the request sent to it. This function is typically implemented only in serial devices.

Solution

N/A

Plugin Details

Severity: Info

ID: 7099

Version: 1.0

Family: SCADA

Published: 2014/02/26

Modified: 2014/06/18

Risk Information

Risk Factor: Info