CVE-2011-4861 Information

Description

The modbus_125_handler function in the Schneider Electric Quantum Ethernet Module on the NOE 771 device (aka the Quantum 140NOE771* module) allows remote attackers to install arbitrary firmware updates via a MODBUS 125 function code to TCP port 502.

Reference

http://reversemode.com/index.php?option=com_content&task=view&id=80&Itemid=1