Title: BlueControl 3.5 SR5 Insecure Library Loading Arbitrary Code Execution
Advisory ID: ZSL-2016-5296
Type: Local/Remote
Impact: System Access
Risk: (4/5)
Release Date: 19.01.2016

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).

Description

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.

Vendor

West Control Solutions - http://www.west-cs.com

Affected Version

3.5.SR5

Tested On

Microsoft Windows 7 Ultimate SP1 (EN)
Microsoft Windows 7 Professional SP1 (EN)

Vendor Status

N/A

PoC

bluecontrol_dllhijack.c

Credits

Vulnerability discovered by Gjoko Krstic - <gjoko@zeroscience.mk>

References

[1] https://exchange.xforce.ibmcloud.com/vulnerabilities/109710
[2] https://cxsecurity.com/issue/WLB-2016010116
[3] https://packetstormsecurity.com/files/135316
[4] https://secunia.com/advisories/68412/

Changelog

[19.01.2016] - Initial release
[21.01.2016] - Added reference [1], [2] and [3]
[05.02.2016] - Added reference [4]

Contact

Zero Science Lab

Web: http://www.zeroscience.mk
e-mail: lab@zeroscience.mk