Security bug per tutti i S.O. Windows

Microsoft originally released this bulletin and patch on July 16, 2003, to correct a security vulnerability in a Windows Distributed Component Object Model (DCOM) Remote Procedure Call (RPC) interface. The patch was and still is effective in eliminating the security vulnerability. However, the “mitigating factors” and “workarounds” discussions in the original security bulletin did not clearly identify all the ports by which the vulnerability could potentially be exploited. Microsoft has updated this bulletin to more clearly enumerate the ports over which RPC services can be invoked and to ensure that customers who choose to implement a workaround before installing the patch have the information that they need to protect their systems. Customers who have already installed the patch are protected from attempts to exploit this vulnerability and need take no further action.

Remote Procedure Call (RPC) is a protocol that is used by the Windows operating system. RPC provides an inter-process communication mechanism that allows a program that is running on one computer to seamlessly run code on a remote computer. The protocol itself is derived from the Open Software Foundation (OSF) RPC protocol. The RPC protocol that is used by Windows includes some additional Microsoft-specific extensions.