CGI Problem on MS IIS 5.0 - Trying to access files on other machines

Pat [MSFT] patfilot at online.microsoft.com
Fri Sep 16 20:03:29 CEST 2005


Don't change the account IIS is running under - that is a pretty big 
security issue waiting to happen.

Change the authentication model for the web site to Basic, then logon as 
you.  That will cause any execution to be in the security context you are 
expecting.

Pat

"paulp" <paulpigott at earthlink.net> wrote in message 
news:klAWe.12369$9i4.3636 at newsread2.news.atl.earthlink.net...
> Based on your comment, I finally realized that IIS is running under the
> IUSR_ account.  So I changed the priveleges on this account on my test IIS
> server as related elsewhere in this note.  So now I'm getting a different
> error.
>
> 1326, "LogonUser", "Logon failure: unknown user name or bad password"
>
> It's progress of a sort.
>
> My test box is running IIS, and I set up a local test account (PYTHONTEST)
> on my primary box.  This is the account I'm trying to hook into at the
> moment.
>
> Any thoughts on this?
>
> Many thanks for your help.
>
> Paul
>
>
> "Pat [MSFT]" <patfilot at online.microsoft.com> wrote in message
> news:O2FMj9juFHA.1572 at TK2MSFTNGP10.phx.gbl...
>> Set the site to be Basic Authentication and login as you.  I suspect that
>> the .exe is either running as IWAM/IUSER (i.e. GUEST) or you are running
>> into a double hop issue.
>>
>>
>> Pat
>>
>> "paulp" <paulpigott at earthlink.net> wrote in message
>> news:RhlWe.12307$_84.12168 at newsread1.news.atl.earthlink.net...
>> > Greetings,
>> >
>> > I'm working on a CGI program that will run under MS IIS 5.0 and will
>> > browse folders on three other machines, building HTML pages that will
>> > provide links to these folders.
>> >
>> > Essentially, the CGI will connect to each machine in turn, doing the
>> > FindFirst/FindNext process based on the current criteria.  It will
>> > select certain files/folders, and build an HTML page as it goes.
>> >
>> > The premise is fine.  If I run the program from the command line, it
>> > seems to work fine and I get my HTML code out.  I can copy the code
>> > into a separate file, open it in the browser, and all appears right
>> > with the world.
>> >
>> > However, when I try to run the CGI from the browser itself, I get all
>> > kinds of problems.  The first one I got was a 1312, "A specified logon
>> > session does not exist.  It may have already been terminated."  After
>> > doing some searching, I began to investigate impersonation of a logged
>> > on user.  This produces a different error: 1314, "A required privilege
>> > is not held by the client."
>> >
>> > The code involved and the output I'm getting follows:
>> >
>> > ---------BEGIN----------
>> > class Impersonate:
>> >    def __init__(self, login, password ):
>> >        self.domain = '4Q9ND21'
>> >        self.login = login
>> >        self.password = password
>> >        self.handel = None
>> >    def logon(self):
>> >        tracelist.append("Impersonate logon step 0")
>> >        win32security.RevertToSelf()    # terminates impersonation
>> >        tracelist.append("Impersonate logon step 1")
>> >        self.handel = win32security.LogonUser( self.login, self.domain,
>> > self.password, win32con.LOGON32_LOGON_INTERACTIVE,
>> > win32con.LOGON32_PROVIDER_DEFAULT )
>> >        tracelist.append("Impersonate logon step 2")
>> >        win32security.ImpersonateLoggedOnUser(self.handel)
>> >        tracelist.append("Impersonate logon step complete")
>> >    def logoff(self):
>> >        win32security.RevertToSelf()    # terminates impersonation
>> >        if self.handel != None:
>> >            self.handel.Close()         # guarantee cleanup
>> > ----------END-----------
>> >
>> > and I execute this code with the following
>> >
>> > ---------BEGIN----------
>> >    impersonate = Impersonate( 'PYTHONTEST', 'PYTHONTEST' )
>> >    try:
>> >        tracelist.append("about to attempt the IMPERSONATE")
>> >        impersonate.logon()
>> >        tracelist.append("impersonate did NOT throw exception")
>> >        b=AdjustPrivilege(SE_SYSTEM_PROFILE_NAME)
>> >        b=AdjustPrivilege(SE_TCB_NAME)
>> >        try:
>> >            tracelist.append("win32api.GetUserName = " +
>> > win32api.GetUserName() )
>> >            # print win32api.GetUserName() #show you're someone else
>> >        finally:
>> >            impersonate.logoff() #return to normal
>> >    except:
>> >        a = "Impersonate Logon Error: %s %s" % (sys.exc_type,
>> > sys.exc_value)
>> >        tracelist.append(a)
>> >        # print sys.exc_type, sys.exc_value
>> > ----------END-----------
>> >
>> > When I run this code, my tracelist comes out with
>> >
>> > ---------BEGIN----------
>> > 2005-09-15 16:43:37
>> > about to attempt the IMPERSONATE
>> > Impersonate logon step 0
>> > Impersonate logon step 1
>> > Impersonate Logon Error: pywintypes.error (1314, 'LogonUser', 'A
> required
>> > privilege is not held by the client.')
>> > ----------END-----------
>> >
>> >
>> > I'm coding this in Python 2.4 and the Windows extensions.  I have a
>> > number of other CGI programs in Python running under IIS that work
>> > correctly, but those only do database accesses.  This one I'm trying to
>> > put together is the first one to actually do file searches.
>> >
>> >
>> > I have set the privileges for the logged on account on my IIS box for
>> > SE_TCB_NAME, SE_CHANGE_NOTIFY_NAME and SE_ASSIGNPRIMARYTOKEN_NAME and
>> > rebooted.  To no avail.  I'm not sure if there are additional
>> > alterations that need to be done to the security policies or not.
>> > Again, I'm not a guru.
>> >
>> >
>> > If anyone can give me more information/guidance I would greatly
>> > appreciate it.  If you need more information from me, I will do my best
>> > to provide it.
>> >
>> > TIA,
>> >
>> > Paul
>> >
>> >
>>
>>
>
> 





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