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Top Forums UNIX for Beginners Questions & Answers Samba - Change passwd from client with ctrl + alt + del Post 302981890 by Purgator on Wednesday 21st of September 2016 04:45:20 AM
Old 09-21-2016
Bug [Solved] Samba - Change passwd from client with ctrl + alt + del

Hello,
I got a very strange issue using samba. From a Windows 7 client that joined the domain, i want to change a user password. Here is what i am doing exactly :

Loging into the domain account, with username and password.
Pressing ctrl + alt + del
Clic on Change password menu
Enter old password and 2 times new password.

Then the result depend. If i proccess that on a virtual machine where windows 7 is installed, that work perfectly, the GUI say that the password is successfully updated and the password is updated for real.
But if i try on my real windows 7 on my laptop, or on my friend laptop (both windows 7), that won't work and display that error message :
Code:
The system has detected a possible attempt to compromise security. Please ensure that you can contact the server that authenticated you.

Additionnals informations : My friend tested it on samba : 3.5.5(compiled) 4.1.17(apt-get) and a 4.5.5 (compiled and personnal jail managment). I tedted by myself on a fresh install of 4.5.5 (compiled).
The amazing thing is that with the same user i can change the password from the virtual machine but from the real machine.
The virtual machine is not up to date.


I'm looking for a solution since yesterday, i can't find anything then i need your help.

Thank you in advance ! =)



EDIT :

I solved it at least, the problem was from Microsoft Windows update.

There are 3 recent security updates that cause the issue :
KB3175024
KB3172605
KB3167679

Just uninstall them as a temporary workaround.
It seems the issue appear only on NT4 PDC, then upgrading to AD DC would fix it.
Microsoft propose also a workaround solution but i didnt got it : https://support.microsoft.com/en-us/kb/3167679

Last edited by Purgator; 09-26-2016 at 11:08 AM..
 

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condor_store_cred(1)					      General Commands Manual					      condor_store_cred(1)

Name
       condor_store_cred securely - stash a password

Synopsis
       condor_store_cred [-help]

       condor_store_credadd[ -c | -u username] [-p password] [-n machinename] [-f filename]

       condor_store_creddelete[ -c | -u username] [-n machinename]

       condor_store_credquery[ -c | -u username] [-n machinename]

Description
       condor_store_credstores passwords in a secure manner. There are two separate uses of condor_store_cred:

	  1.  A  shared  pool  password  is needed in order to implement the  PASSWORD authentication method. condor_store_cred using the -coption
	  deals with the password for the implied  condor_pool@$(UID_DOMAIN) user name.

	  On a Unix machine, condor_store_cred with the -foption is used to set the pool password, as needed when used with the  PASSWORD  authen-
	  tication method. The pool password is placed in a file specified by the  SEC_PASSWORD_FILE configuration variable.

	  2. In order to submit a job from a Windows platform machine, or to execute a job on a Windows platform machine utilizing the run_as_own-
	  erfunctionality, condor_store_cred stores the password of a user/domain pair securely in the Windows registry. Using this  stored  pass-
	  word,  Condor  may act on behalf of the submitting user to access files, such as writing output or log files. Condor is able to run jobs
	  with the user ID of the submitting user. The password is stored in the same manner as the system does when setting or  changing  account
	  passwords.

       Passwords are stashed in a persistent manner; they are maintained across system reboots.

       The  addargument on the Windows platform stores the password securely in the registry. The user is prompted to enter the password twice for
       confirmation, and characters are not echoed. If there is already a password stashed, the old password will be overwritten by the new  pass-
       word.

       The deleteargument deletes the current password, if it exists.

       The queryreports whether the password is stored or not.

Options
       -c

	  Operations refer to the pool password, as used in the  PASSWORD authentication method.

       -f filename

	  For Unix machines only, generates a pool password file named filenamethat may be used with the  PASSWORD authentication method.

       -help

	  Displays a brief summary of command options.

       -n machinename

	  Apply the command on the given machine.

       -p password

	  Stores password, rather than prompting the user to enter a password.

       -u username

	  Specify the user name.

Exit Status
       condor_store_credwill exit with a status value of 0 (zero) upon success, and it will exit with the value 1 (one) upon failure.

Author
       Condor Team, University of Wisconsin-Madison

Copyright
       Copyright  (C)  1990-2012  Condor  Team,  Computer  Sciences Department, University of Wisconsin-Madison, Madison, WI. All Rights Reserved.
       Licensed under the Apache License, Version 2.0.

       See the Condor Version 7.8.2 Manualor http://www.condorproject.org/licensefor additional notices. condor-admin@cs.wisc.edu

								  September 2012					      condor_store_cred(1)
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