Crouzet em4 soft 1.1.04 / M3 soft 3.1.2.0 Insecure File Permissions
Posted on 01 March 2016
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>
