The article How to elevate programs' privileges correctly using Vista's UAC: In order to elevate an existing application, a new instance of the application process must be created. The blog post Programming Elevated Privilege/UAC:Ĭode can only be elevated at process level when startup, which means that a running process cannot be elevated. This Super User answer cites two additional sources confirming the same: Note: User Account Control was introduced with the release of Windows Vista. However, this was not enforced until Vista. As such, it typically does not make sense to switch a process' token once it has begun execution. may have been opened in an old security context, inflight operations may use inconsistent security contexts, etc. The NT kernel was never intended to allow token switching once a process started running. 1 In this MSDN Application Security for Windows Desktop thread, a poster identifying himself as a member of the Windows Kernel Team states: Once a process has been created it is not possible to replace its access token. If the process is not granted admin rights, the filtered, standard user token is used. If the process is run "elevated" as Administrator, the unfiltered access token is used. CMD.EXE) is created, it is assigned one of these two access tokens. A second "filtered token" with standard user accessĪt the time a process (e.g.One with full administrator access, and.When a user with administrative rights logs into a Windows machine with User Account Control (UAC) enabled, two separate access tokens are created: It's not possible to grant additional permissions to an already running process. ![]() ![]() (A new cmd.exe.) In the case of the Command Prompt, starting a new instance with an access token that has higher permissions will always result in a new window being created. TL DR - The only option is to spawn another process.
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