Duplicating Handles

Among cooperating processes, any one process is only as restricted as the least restricted process. For example, a process can call the DuplicateHandle function to duplicate an object handle belonging to a second (source) process into a third (target) process. If the access rights requested for the target process are greater than the rights held by the source process, the system checks the requested access rights against the security context of the process calling DuplicateHandle. If the calling process has the required access rights, the handle is duplicated, and the target process has greater access to the object than the source process.

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