Impersonation issue with PsExec ?

  • Thread starter Thread starter Yuri Palagin
  • Start date Start date
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Yuri Palagin

Hi there.



I want to enable some users to use PsExec utility (www.sysinternals.com) for
executing commands remotely on some servers, but the problem is, PsExec has
a key "-s" that lets "run remote process in the System account"(as the help
goes). My testing shows that using "psexec \\server -s cmd" allows any user
to get access to do just anything on servers with the Admin$ share on. OK, I
can disable the Admin$ share, but this disables using PsExec at all. I got a
hunch that it has something to do with restricting the right to impersonate,
but I've no idea where I can find it. Can anyone give me a lead?



I'm not stuck with PsExec, so maybe there is another way to allow remote
command-line to only the chosen, is there?



Thanks for any ideas,


ypal
 
If you're running the latest version of psexec, you might want to contact
Mark at SysInternals - if any user can connect it sounds like a security
bug. Psexecsvc is probably already running as local system (it does on my
machine). It uses the user name and password (plaintext - another security
problem) parameters to impersonates a different user.

Some options for remote execution of a batch file:
- WMI
- Task Scheduler service

Even better than just a cmdline:
- Remote Desktop/Terminal Services

We might have a kerberized telnet client available now. I know there were
folks working on one.
 
psexec actually installs the service on the remote machine on the fly every
time you run it, you would have to have some pretty interesting permissions
set up if ANYONE can install services on any of your machines.

joe
 
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