WEG SuperDrive G2 12.0.0 Insecure File Permissions

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WEG SuperDrive G2 v12.0.0 Insecure File Permissions  
  
  
Vendor: WEG Group  
Product web page: http://www.weg.net  
Affected version: SuperDrive G2 (v12.0.0 Build 20150930-J1.8.0_60-NB8.0.2)  
SuperDrive (v7.0.0)  
  
Summary: SuperDrive is a Windows graph tool for parameter setting,  
control and monitor of WEG Drives. It permits to edit directly in the  
drive online parameters, or to edit offline parameter files stored  
in the microcomputer. It enables you to store parameters of all drives  
that exist in the installation. The software also incorporates functions  
enable the upload to the drive of the microcomputer parameters sets  
as well as the download from the drive to the microcomputer. The  
communication between drive and microcomputer is realized via RS232  
serial interface (point to point) or by RS485 for network linkage.  
  
Desc: SuperDrive 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 'Authenticated  
Users' group.  
  
Tested on: Microsoft Windows 7 Ultimate SP1 (EN)  
Microsoft Windows 7 Professional SP1 (EN)  
Java 1.8.0_60  
  
  
Vulnerability discovered by Gjoko 'LiquidWorm' Krstic  
@zeroscience  
  
  
Advisory ID: ZSL-2016-5294  
Advisory URL: http://www.zeroscience.mk/en/vulnerabilities/ZSL-2016-5294.php  
  
  
25.11.2015  
  
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C:\WEG\SuperDrive 7.0.0>cacls SuperDrive.exe  
C:\WEG\SuperDrive 7.0.0\SuperDrive.exe BUILTIN\Administrators:F  
NT AUTHORITY\SYSTEM:F  
BUILTIN\Users:R  
NT AUTHORITY\Authenticated Users:C  
  
  
C:\WEG\SuperDrive 7.0.0>  
  
  
C:\WEG\SuperDrive G2 12.0.0>cacls *.exe  
C:\WEG\SuperDrive G2 12.0.0\SuperDriveG2.exe BUILTIN\Administrators:F  
NT AUTHORITY\SYSTEM:F  
BUILTIN\Users:R  
NT AUTHORITY\Authenticated Users:C  
  
C:\WEG\SuperDrive G2 12.0.0\unins000.exe BUILTIN\Administrators:F  
NT AUTHORITY\SYSTEM:F  
BUILTIN\Users:R  
NT AUTHORITY\Authenticated Users:C  
  
  
C:\WEG\SuperDrive G2 12.0.0>  
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