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Problem with Process-to-process Security ...

Posted on 2000-02-24
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Last Modified: 2013-12-03
Simply put, I have a process (normally a service running in an account with Administrative rights) that is given a Pipe Handle from its client processes (running on other accounts) using a RPC/COM function call. The Pipe Handle is created with CreatePipe in the client process. The client process therefore have to DuplicateHandle the handle that is given to the server process. In order to do so, the server process have to grant "EVERYONE" (?) the following access rights to its own process: PROCESS_QUERY_INFORMATION, PROCESS_DUP_HANDLE, and SYNCHRONIZE.

However, I have failed to do that using the code that follows:

   // Give other processes right to duplicate handles for this application.

   HANDLE hProcess = ::OpenProcess(PROCESS_ALL_ACCESS, FALSE, ::GetCurrentProcessId());

   if (NULL != hProcess)
   {
      HANDLE hProcessToken = NULL;
      if (::OpenProcessToken(::GetCurrentProcess(), TOKEN_READ | TOKEN_ADJUST_PRIVILEGES, &hProcessToken))
      {
         if (::SetPrivilege(hProcessToken, SE_SECURITY_NAME, TRUE))
         {
            PACL pOldDacl = NULL;
            PSECURITY_DESCRIPTOR pSecurityDescriptor = NULL;
            DWORD dwErrorCode = ::GetSecurityInfo(hProcess, SE_KERNEL_OBJECT, DACL_SECURITY_INFORMATION, NULL, NULL, &pOldDacl, NULL, &pSecurityDescriptor);
            if (ERROR_SUCCESS == dwErrorCode)
            {
               EXPLICIT_ACCESS rgExplicitAccess[1] = { 0 };

               ::BuildExplicitAccessWithName(rgExplicitAccess, _T("EVERYONE"), PROCESS_QUERY_INFORMATION | PROCESS_DUP_HANDLE | SYNCHRONIZE, GRANT_ACCESS, NO_INHERITANCE);

               PACL pNewDacl = NULL;
               dwErrorCode = ::SetEntriesInAcl(sizeof(rgExplicitAccess)/sizeof(rgExplicitAccess[0]), rgExplicitAccess, pOldDacl, &pNewDacl);

               if (ERROR_SUCCESS == dwErrorCode) // 1332 : ERROR_NONE_MAPPED : "No mapping between account names and security IDs was done."
               {
                  dwErrorCode = ::SetSecurityInfo(hProcess, SE_KERNEL_OBJECT, DACL_SECURITY_INFORMATION, NULL, NULL, pNewDacl, NULL);

                  if (ERROR_SUCCESS == dwErrorCode)
                  {
                     HLOCAL hLocal = ::LocalHandle(pNewDacl);

                     if (NULL != hLocal)
                     {
                        hLocal = ::LocalFree(hLocal);
                     }
                  }
               }

               HLOCAL hLocal = ::LocalHandle(pSecurityDescriptor);

               if (NULL != hLocal)
               {
                  hLocal = ::LocalFree(hLocal);
               }
            }
         }

         ::CloseHandle(hProcessToken);
         hProcessToken = NULL;
      }

      ::CloseHandle(hProcess);
      hProcess = NULL;
   }

SetPrivilege is a function that sets or resets a privilege for a process token (I don't know if its necessary).

As indicated, it is the function SetEntriesInAcl that fails with error code ERROR_NONE_MAPPED.

How can I accomplish the task of duplicating the Pipe Handle for the server process ?
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Question by:stefanr
  • 2
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5 Comments
 
LVL 86

Accepted Solution

by:
jkr earned 200 total points
ID: 2555757
Are you using an english NT? "EVERYONE" usually is localized, which makes it quite a pain using these APIs...

To do this, use

    psidWorldSid    =   ( PSID) LocalAlloc  (   LPTR,
                                                GetSidLengthRequired    (   1)
                                            );

    InitializeSid   (   psidWorldSid,   &siaWorldSidAuthority,  1);

    *(  GetSidSubAuthority  (   psidWorldSid,   0)) =   SECURITY_WORLD_RID;



    //  lookup clear text name of the group
    if  (   !LookupAccountSid   (   NULL,
                                    psidWorldSid,
                                    pszNameBuf,
                                    pdwNameBufSize,
                                    acReferencedDomain,
                                    &dwDomainBufSize,
                                    &eUse
                                )
        )
        {
            dwErr   =   GetLastError    ();
        }
0
 
LVL 15

Expert Comment

by:NickRepin
ID: 2556117
/*----------------------------------------------------------------------
| Name:     SetPipeSecurity
| Author:   Chris Nefcy
| Desc:     sets up security on pipe to allow access to everyone
| Params:   none
| Compiler: 32-bit VC++ or Win32 SDK
|
| COPYRIGHT:
|
|   (C) Copyright Microsoft Corp. 1993.  All rights reserved.
|
|   You have a royalty-free right to use, modify, reproduce and
|   distribute the Sample Files (and/or any modified version) in
|   any way you find useful, provided that you agree that
|   Microsoft has no warranty obligations or liability for any
|   Sample Application Files which are modified.
----------------------------------------------------------------------*/
VOID SetPipeSecurity ( VOID)
{
    HANDLE               hPipe;
    SECURITY_ATTRIBUTES  saPipeSecurity;
    PSECURITY_DESCRIPTOR pPipeSD   = NULL;

    // security inits
    memset ( ( VOID *) &saPipeSecurity, 0, sizeof ( SECURITY_ATTRIBUTES) );

    // alloc & init SD
    if ( ! ( pPipeSD = ( PSECURITY_DESCRIPTOR)
                    ( malloc ( SECURITY_DESCRIPTOR_MIN_LENGTH)) ) )
        return;

    if ( ! InitializeSecurityDescriptor ( pPipeSD,
                                    SECURITY_DESCRIPTOR_REVISION) )
        return;

    // set NULL DACL on the SD
    if ( ! SetSecurityDescriptorDacl ( pPipeSD, TRUE, ( PACL) NULL, FALSE) )
        return;

    // now set up the security attributes
    saPipeSecurity.nLength              = sizeof ( SECURITY_ATTRIBUTES);
    saPipeSecurity.bInheritHandle       = TRUE;
    saPipeSecurity.lpSecurityDescriptor = pPipeSD;

    // now create named pipe with security
    hPipe = CreateNamedPipe (
                    PIPENAME,                  // name of pipe
                    PIPE_ACCESS_DUPLEX |       // Open mode
                    FILE_FLAG_OVERLAPPED,      // use overlapped structure
                    PIPE_TYPE_MESSAGE     |    // message mode
                    PIPE_READMODE_MESSAGE |    
                    PIPE_WAIT,                 // blocking
                    dwMaxNumberOfClients,      // Max. number of instances
                    PIPEPKTSIZE,               // Size of output buffer
                    PIPEPKTSIZE,               // Size of input buffer
                    0L,                        // Time-out value (use default)
                    &saPipeSecurity );         // security flag

}
/* eof - SetPipeSecurity */

0
 
LVL 15

Expert Comment

by:NickRepin
ID: 2556119
/*----------------------------------------------------------------------
| Name:     SetPipeSecurity
| Author:   Chris Nefcy
| Desc:     sets up security on pipe to allow access to everyone
| Params:   none
| Compiler: 32-bit VC++ or Win32 SDK
|
| COPYRIGHT:
|
|   (C) Copyright Microsoft Corp. 1993.  All rights reserved.
|
|   You have a royalty-free right to use, modify, reproduce and
|   distribute the Sample Files (and/or any modified version) in
|   any way you find useful, provided that you agree that
|   Microsoft has no warranty obligations or liability for any
|   Sample Application Files which are modified.
----------------------------------------------------------------------*/
VOID SetPipeSecurity ( VOID)
{
    HANDLE               hPipe;
    SECURITY_ATTRIBUTES  saPipeSecurity;
    PSECURITY_DESCRIPTOR pPipeSD   = NULL;

    // security inits
    memset ( ( VOID *) &saPipeSecurity, 0, sizeof ( SECURITY_ATTRIBUTES) );

    // alloc & init SD
    if ( ! ( pPipeSD = ( PSECURITY_DESCRIPTOR)
                    ( malloc ( SECURITY_DESCRIPTOR_MIN_LENGTH)) ) )
        return;

    if ( ! InitializeSecurityDescriptor ( pPipeSD,
                                    SECURITY_DESCRIPTOR_REVISION) )
        return;

    // set NULL DACL on the SD
    if ( ! SetSecurityDescriptorDacl ( pPipeSD, TRUE, ( PACL) NULL, FALSE) )
        return;

    // now set up the security attributes
    saPipeSecurity.nLength              = sizeof ( SECURITY_ATTRIBUTES);
    saPipeSecurity.bInheritHandle       = TRUE;
    saPipeSecurity.lpSecurityDescriptor = pPipeSD;

    // now create named pipe with security
    hPipe = CreateNamedPipe (
                    PIPENAME,                  // name of pipe
                    PIPE_ACCESS_DUPLEX |       // Open mode
                    FILE_FLAG_OVERLAPPED,      // use overlapped structure
                    PIPE_TYPE_MESSAGE     |    // message mode
                    PIPE_READMODE_MESSAGE |    
                    PIPE_WAIT,                 // blocking
                    dwMaxNumberOfClients,      // Max. number of instances
                    PIPEPKTSIZE,               // Size of output buffer
                    PIPEPKTSIZE,               // Size of input buffer
                    0L,                        // Time-out value (use default)
                    &saPipeSecurity );         // security flag

}
/* eof - SetPipeSecurity */

0
 
LVL 3

Author Comment

by:stefanr
ID: 2557860
Yes, it was a localization problem. In fact it is lucky that I did not run an English Windows NT since the application must work on any language.
Your comment helped me to find the proper documentation in MSDN (in this case it seems that it is necessary to know exactly what to search for; like SECURITY_WORLD_RID in this case), so I accept the comment as an answer.
0
 
LVL 86

Expert Comment

by:jkr
ID: 2557952
Thanx ;-)

This problem is quite common, and the MS habit to localize everything is a pain in the <censored>. Until Office2k, the even used to be localized versions of VBA - just imagine C/C++ keywords translated to your native language (this makes me frightened ;-)
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