Failed To Openprocesstoken. Error Code 6
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Openprocesstoken Example
Newbie Joined: 26 October 2010 Status: Offline Points: 10 Topic: CreateProcessAsUser openprocesstoken c# randomly fails with error 6Posted: 27 October 2010 at 11:17am Hello all,First of all, thanks token_adjust_privileges for your very instructional forums:)I have a problem with CreateProcessAsUser, for which I can't find the solution in this forum or any other.I am developing a
Lookupprivilegevalue
service that launches a program in the current active session as local system user.So here is the process:(all these calls are made from a service running in session 0 as local system)OpenProcessToken with handle returned by GetCurrentProcessDuplicateTokenExSetTokenInformation to change sessionId to current active sessionGetTokenInformation on sessionId (because without it CreateProcessAsUser crashes
Gettokeninformation
(!))and finally CreateProcessAsUserevery things work fine, except that it randomly fails with error code 6 (INVALID_HANDLE).What I mean by randomly is that if I launch the process several times, it will work few times, then fail few times, then re-work few times etc...Thanks in advance. wj32 Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: 16 January 2009 Location: Australia Status: Offline Points: 1016 Posted: 27 October 2010 at 11:41am Please post your code... PH, a free and open source process viewer. stant Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 26 October 2010 Status: Offline Points: 10 Posted: 27 October 2010 at 12:52pm oops sorry, here's the code, thanks. void launch(const int _sessionId, const char *exe, const char *cmd) { HANDLE curHandle = GetCurrentProcess(); HANDLE accessHandle; HANDLE dupHandle; DWORD sessionId = _sessionId; DWORD cb = sizeof(DWORD); if (!OpenProcessToken(curHandle, TOKEN_QUERY|TOKEN_DUPLICATE|TOKEN_ASSIGN_PRIMARY, &access
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Impersonateloggedonuser
Dynamics Programs & communities Students Startups Forums MSDN Subscriber downloads Sign in Search Microsoft Search Windows Dev Center Windows Dev Center Explore What’s new for Windows 10 Intro to Universal Windows Platform Coding challenges Develop for accessibility Build for enterprise Windows Store opportunities Docs Windows apps Get started Design and UI Develop API reference http://forum.sysinternals.com/createprocessasuser-randomly-fails-with-error-6_topic24241.html Publish Monetize Promote Games Get started UI design Develop Publish Desktop Get started Design Develop API reference Test and deploy Compatibility Windows IoT Microsoft Edge Windows Holographic Downloads Samples Support Why Windows Dashboard Explore What’s new for Windows 10 Intro to Universal Windows Platform Coding challenges Develop for accessibility Build for enterprise Windows Store opportunities Docs Windows apps Get started Design and UI Develop API reference Publish Monetize https://social.msdn.microsoft.com/Forums/windowsdesktop/en-US/68783a59-c553-4c1b-8697-d78c5a4ca8af/openprocesstoken-returns-access-denied?forum=windowssdk Promote Games Get started UI design Develop Publish Desktop Get started Design Develop API reference Test and deploy Compatibility Windows IoT Microsoft Edge Windows Holographic Downloads Samples Support Why Windows Dashboard Ask a question Quick access Forums home Browse forums users FAQ Search related threads Remove From My Forums Asked by: OpenProcessToken returns Access Denied Windows Desktop Development > Windows Desktop SDK Question 1 Sign in to vote Hi, I have a service running under a local user account (which is a member of the local Administrators group). This service has to launch an application for a currently logged on user (a different user). These are my steps: 1. Find a well known process id (explorer.exe) that is ran by a logged on user. 2. Adjust privileges to get SE_DEBUG_NAME enabled. 3. Use h = OpenProcess(PROCESS_ALL_ACCESS, .... ) to get a handle to the process. 4. Use OpenProcessToken(h, TOKEN_QUERY | TOKEN_IMPERSONATE | TOKEN_DUPLICATE, ....) to get a user token. <--- this is the step that is always failing with access denied error. If I use Local System to run the service, it works perfect. Administrator - not. What privileges the administrator is missing to call OpenProcessToken for another process? Thanks, Leon
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