The US Department of Homeland Security (DHS) has issued a further warning over the major flaw disclosed earlier this month affecting Microsoft's key operating systems. After the alarm was raised on 16 July by Microsoft, the DHS issued its first warning 8 days later that users should implement the patch.
The critical flaw is in Microsoft's Distributed Component Object Model Remote Procedure Call (RPC) interface. The vulnerability involves the RPC protocol, which deals with inter-computer communications. Microsoft warned that, under certain circumstances, the RPC might not properly check messages sent to the PC.