Crouzet em4 soft 1.1.04 / M3 soft 3.1.2.0 Insecure File Permissions

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Crouzet em4 soft 1.1.04 and M3 soft 3.1.2.0 Insecure File Permissions  
  
  
Vendor: Crouzet Automatismes SAS  
Product web page: http://www.crouzet-automation.com  
Affected version: em4 soft (1.1.04 and 1.1.03.01)  
M3 soft (3.1.2.0)  
  
Summary: em4 is more than just a nano-PLC. It is a leading  
edge device supported by best-in-class tools that enables  
you to create and implement the smartest automation applications.  
Millenium 3 (M3) is easy to program and to implement, it enables  
the control and monitoring of machines and automation installations  
with up to 50 I/O. It is positioned right at the heart of the  
Crouzet Automation range.  
  
Desc: em4 soft and M3 soft suffers from an elevation of privileges  
vulnerability which can be used by a simple authenticated user that can  
change the executable file with a binary of choice. The vulnerability  
exist due to the improper permissions, with the 'C' flag (Change) for  
'Everyone' group.  
  
Tested on: Microsoft Windows 7 Professional SP1 (EN)  
Microsoft Windows 7 Ultimate SP1 (EN)  
  
  
Vulnerability discovered by Gjoko 'LiquidWorm' Krstic  
@zeroscience  
  
  
Advisory ID: ZSL-2016-5310  
Advisory URL: http://www.zeroscience.mk/en/vulnerabilities/ZSL-2016-5310.php  
  
  
25.01.2016  
  
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C:\Program Files (x86)\Crouzet automation>cacls "em4 soft"  
C:\Program Files (x86)\Crouzet automation\em4 soft Everyone:(OI)(CI)C  
NT SERVICE\TrustedInstaller:(ID)F  
NT SERVICE\TrustedInstaller:(CI)(IO)(ID)F  
NT AUTHORITY\SYSTEM:(ID)F  
NT AUTHORITY\SYSTEM:(OI)(CI)(IO)(ID)F  
BUILTIN\Administrators:(ID)F  
BUILTIN\Administrators:(OI)(CI)(IO)(ID)F  
BUILTIN\Users:(ID)R  
BUILTIN\Users:(OI)(CI)(IO)(ID)(special access:)  
GENERIC_READ  
GENERIC_EXECUTE  
  
CREATOR OWNER:(OI)(CI)(IO)(ID)F  
  
  
C:\Program Files (x86)\Crouzet automation>cd "em4 soft"  
  
C:\Program Files (x86)\Crouzet automation\em4 soft>cacls *.exe  
C:\Program Files (x86)\Crouzet automation\em4 soft\em4 soft.exe Everyone:(ID)C  
NT AUTHORITY\SYSTEM:(ID)F  
BUILTIN\Administrators:(ID)F  
BUILTIN\Users:(ID)R  
  
C:\Program Files (x86)\Crouzet automation\em4 soft\unins000.exe Everyone:(ID)C  
NT AUTHORITY\SYSTEM:(ID)F  
BUILTIN\Administrators:(ID)F  
BUILTIN\Users:(ID)R  
  
  
C:\Program Files (x86)\Crouzet automation\em4 soft>  
  
  
================================================================================================  
  
  
C:\Program Files (x86)\Crouzet Automatismes>cacls "Millenium 3"  
C:\Program Files (x86)\Crouzet Automatismes\Millenium 3 Everyone:(OI)(CI)C  
NT SERVICE\TrustedInstaller:(ID)F  
NT SERVICE\TrustedInstaller:(CI)(IO)(ID)F  
NT AUTHORITY\SYSTEM:(ID)F  
NT AUTHORITY\SYSTEM:(OI)(CI)(IO)(ID)F  
BUILTIN\Administrators:(ID)F  
BUILTIN\Administrators:(OI)(CI)(IO)(ID)F  
BUILTIN\Users:(ID)R  
BUILTIN\Users:(OI)(CI)(IO)(ID)(special access:)  
GENERIC_READ  
GENERIC_EXECUTE  
  
CREATOR OWNER:(OI)(CI)(IO)(ID)F  
  
  
C:\Program Files (x86)\Crouzet Automatismes>cd "Millenium 3"  
  
C:\Program Files (x86)\Crouzet Automatismes\Millenium 3>cacls *.exe  
C:\Program Files (x86)\Crouzet Automatismes\Millenium 3\M3 soft.exe Everyone:(ID)C  
NT AUTHORITY\SYSTEM:(ID)F  
BUILTIN\Administrators:(ID)F  
BUILTIN\Users:(ID)R  
  
C:\Program Files (x86)\Crouzet Automatismes\Millenium 3\unins000.exe Everyone:(ID)C  
NT AUTHORITY\SYSTEM:(ID)F  
BUILTIN\Administrators:(ID)F  
BUILTIN\Users:(ID)R  
  
  
C:\Program Files (x86)\Crouzet Automatismes\Millenium 3>  
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