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
--
C:Program Files (x86)Crouzet automation>cacls "em4 soft"
C:Program Files (x86)Crouzet automationem4 soft Everyone:(OI)(CI)C
NT SERVICETrustedInstaller:(ID)F
NT SERVICETrustedInstaller:(CI)(IO)(ID)F
NT AUTHORITYSYSTEM:(ID)F
NT AUTHORITYSYSTEM:(OI)(CI)(IO)(ID)F
BUILTINAdministrators:(ID)F
BUILTINAdministrators:(OI)(CI)(IO)(ID)F
BUILTINUsers:(ID)R
BUILTINUsers:(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 automationem4 soft>cacls *.exe
C:Program Files (x86)Crouzet automationem4 softem4 soft.exe Everyone:(ID)C
NT AUTHORITYSYSTEM:(ID)F
BUILTINAdministrators:(ID)F
BUILTINUsers:(ID)R
C:Program Files (x86)Crouzet automationem4 softunins000.exe Everyone:(ID)C
NT AUTHORITYSYSTEM:(ID)F
BUILTINAdministrators:(ID)F
BUILTINUsers:(ID)R
C:Program Files (x86)Crouzet automationem4 soft>
================================================================================================
C:Program Files (x86)Crouzet Automatismes>cacls "Millenium 3"
C:Program Files (x86)Crouzet AutomatismesMillenium 3 Everyone:(OI)(CI)C
NT SERVICETrustedInstaller:(ID)F
NT SERVICETrustedInstaller:(CI)(IO)(ID)F
NT AUTHORITYSYSTEM:(ID)F
NT AUTHORITYSYSTEM:(OI)(CI)(IO)(ID)F
BUILTINAdministrators:(ID)F
BUILTINAdministrators:(OI)(CI)(IO)(ID)F
BUILTINUsers:(ID)R
BUILTINUsers:(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 AutomatismesMillenium 3>cacls *.exe
C:Program Files (x86)Crouzet AutomatismesMillenium 3M3 soft.exe Everyone:(ID)C
NT AUTHORITYSYSTEM:(ID)F
BUILTINAdministrators:(ID)F
BUILTINUsers:(ID)R
C:Program Files (x86)Crouzet AutomatismesMillenium 3unins000.exe Everyone:(ID)C
NT AUTHORITYSYSTEM:(ID)F
BUILTINAdministrators:(ID)F
BUILTINUsers:(ID)R
C:Program Files (x86)Crouzet AutomatismesMillenium 3>
