* User impersonation in filesystem mini-redirector daemon works with cmd.exe but not Cygwin mintty.exe ?
@ 2024-04-24 15:09 Roland Mainz
0 siblings, 0 replies; only message in thread
From: Roland Mainz @ 2024-04-24 15:09 UTC (permalink / raw)
To: cygwin
Hi!
----
I'm working right now on a filesystem min-redirector with
CYGWIN_NT-10.0-19045 3.6.0-0.115.g579064bf4d40.x86_64 and noticed a
malfunction.
The mini-rdr userland daemon is running as user "SYSTEM";
"SeImpersonatePrivilege" and
"SeDelegateSessionUserImpersonatePrivilege" are enabled, so user
impersonation is supposed to work...
... but the mini-rdr daemon can NOT do impersonation with requests
from Cygwin mintty.exe or Cygwin/KDE konsole.exe, as it only gets a
process token.
But if I run the same application with cmd.exe, then impersonation in
the min-rdr works and each thread properly gets a thread/impersonation
token.
Does anyone have an idea what might be the difference in this case,
and how I can debug this further ?
----
Bye,
Roland
P.S.: Out of curiosity, I tried this with /usr/bin/newgrp, and in this
case the min-rdr daemon also gets an impersonation token...
--
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2024-04-24 15:09 User impersonation in filesystem mini-redirector daemon works with cmd.exe but not Cygwin mintty.exe ? Roland Mainz
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