Error On Mutex Creating. Access Is Denied
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Kr DubeyNovember 10, 20090 0 0 0 If you are in a situation where, one process creates a MUTEX with default security descriptor and other process running in the same user’s context is not able to access it. You might be facing the problem because of newly introduced integrity mechanism in Windows. Integrity level implemented as a SID and is defined in the access token of the user and as a ACE in the SACL of the resource. A token with low integrity level SID cannot access a resource which http://stackoverflow.com/questions/10139958/createmutex-access-is-denied has high integrity level. Most of time application would not need to define the integrity level. Windows would automatically derive it from the parent process and assign it to the access token. A low integrity level process cannot communicate to the higher integrity level process. You could refer to all this in detail at – Designing Applications to Run https://blogs.msdn.microsoft.com/winsdk/2009/11/10/access-denied-on-a-mutex/ at a Low Integrity Level Windows Integrity Mechanism Design To determine the integrity level of a process you can use “Process Explorer”. The process which is trying to communicate with the server will present Low access token which would have “high” or “medium” integrity level. Untrusted < low < medium < high < system is the increasing order of integrity level. Untrusted level is far lower than high, therefore the client’s token would not be allowed to communicate with the server and would result into “Access Denied”. However, a process is running at high integrity level we can certainly create the resource with low integrity level access so that any Access token with low integrity SID can be compared against the DACL of the resource and client gets access to the resource. This is done by adding an ACE in the SACL of the Security Descriptor of the resource. For example, S:(ML;;NW;;; S-1-16-0) -> Where S-1-16-0 represents untrusted/anonymous integrity level. S:(ML;;NW;;;LW) -> Where LW represents low integrity level. Assume you are using following string security descriptor. "D:(A;;GA;;;WD)(A;;GA;
help? Post your question and get tips & solutions from a community of 418,536 IT Pros & Developers. It's quick & easy. Access denied while trying to create a https://bytes.com/topic/c-sharp/answers/498118-access-denied-while-trying-create-mutex mutex. P: n/a UJ Has anybody seen an 'Access denied' error when trying to create a mutex? If so - what does that mean? I though Mutex's were not supposed to error out. TIA - Jeff. Jun https://kb.plesk.com/en/128532 5 '06 #1 Post Reply Share this Question 7 Replies P: n/a Vadym Stetsyak Hello, UJ! U> Has anybody seen an 'Access denied' error when trying to create a mutex? U> If so - what does error on that mean? I though Mutex's were not supposed to error U> out. AFAIK to create mutex, your code has to have SecurityPermissionFlag.UnmanagedCode flag. Also if you're "creating" mutex that already exists you can have no access to it, if its creator had set appropriate ACLs -- Regards, Vadym Stetsyak www: http://vadmyst.blogspot.com Jun 5 '06 #2 P: n/a UJ The thing that is weird is it happens only occasionally. If we restart the error on mutex program, it will work. "Vadym Stetsyak"
& Site Management Integration Options Developers eMail Components CloudLinux Extensions Extension Catalog Submit your Extension Plans & Pricing Support Resources FAQs Forums Knowledge Base Documentation Downloads Plesk University Release notes Blog Become a Partner Russian German French Spanish Chinese Japanese Italian Language English Russian German French Spanish Chinese Japanese Italian any Search Plesk utilities fail to run: Access is denied. (Error code 5) at create mutex Global Article ID: 128532, created on Mar 10, 2016, last review on Mar 10, 2016 Applies to: Plesk 12.5 for Windows Plesk 12.0 for Windows Plesk 11.5 for Windows Symptoms There can be different symptoms of the issue. Unable to open Virtual directories under Subscriptions - example.com - Websites & Domains When debug is enabled %plesk_dir%admin\conf\panel.ini, the following entry can be found in %plesk_dir%admin\logs\php_error.log: [2016-03-09 21:12:35] DEBUG [util_exec] [05f5fac0a462e91f538dfa5639e72056][0] Starting: websrvmng --list-wdirs --vhost-name=example.com --wdir-name=/ When running the same command in command line, the following error appears: C:\> "%plesk_bin%\websrvmng.exe" --list-wdirs --vhost-name=example.com --wdir-name=/ Access is denied. (Error code 5) at create mutex Global\{84D6D206-3ADB-41de-BD3F-AD3606673FCF} The following errors can be found in Windows Event Viewer when running Plesk Reconfigurator: System.Exception: Unable to execute "D:\Parallels\Plesk\admin\bin\websrvmng.exe" --configure-plesk-website: Access is denied. (Error code 5) at create mutex Global\{84D6D206-3ADB-41de-BD3F-AD3606673FCF} at reconfigurator.Utility.execUtil(String utilName, String arguments, String inputString, Hashtable envs, Boolean b64Bit) at reconfigurator.CheckPleskServices.Run() Cause There are hanged Plesk processes in the system. In other words, if "websrvmng.exe" fails it means there are hanged "websrvmng.exe"