full-disclosure - [FD] BLF-Tech LLC VisualView HMI Software – Insecure Library Loading Allows Code Execution

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Message-ID: <CAB8+WF2e5_xFmLLZ6fsRdeVWe4fSe5K+N8NfxPY9ZtR5vBp0kw@mail.gmail.com>
Date: Tue, 27 Jun 2017 23:31:13 +0000
From: Karn Ganeshen <karnganeshen@...il.com>
To: "fulldisclosure@...lists.org" <fulldisclosure@...lists.org>
Subject: [FD] BLF-Tech LLC VisualView HMI Software – Insecure Library Loading Allows Code Execution

Vendor: BLF-Tech LLC
Equipment: VisualView HMI Software
Vulnerability: DLL Hijacking
Advisory URL:
https://ipositivesecurity.com/2017/05/18/ics-blf-tech-llc-visualview-hmi-software-insecure-library-loading-allows-code-execution/

ICS-CERT Advisory
https://ics-cert.us-cert.gov/advisories/ICSA-17-115-01

------------------------
AFFECTED PRODUCTS
------------------------
The following VisualView HMI versions are affected:

VisualView HMI Version 9.9.14.0 and prior.

------------------------
IMPACT
------------------------
An attacker who exploits this vulnerability may be able to remotely execute
arbitrary code.

------------------------
VULNERABILITY OVERVIEW
------------------------

UNCONTROLLED SEARCH PATH ELEMENT CWE-427
The uncontrolled search path element vulnerability has been identified,
which may allow an attacker to run a malicious DLL file within the search
path resulting in execution of arbitrary code.

CVE-2017-6051 has been assigned to this vulnerability. A CVSS v3 base score
of 7.0 has been assigned; the CVSS vector string is
(AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H).

------------------------
Missing Libraries:
------------------------
iopc2.dll

------------------------
Application Executables (that look for missing DLL):
------------------------
Configure.exe

------------------------
Steps to reproduce
------------------------
1. Generate a dll payload
msfvenom –p windows/exec cmd=calc.exe –f dll –o iopc2.dll
2. Place this dll in install directory (or C:\Windows, or any directory
defined in the PATH environment variable)
C:\app-folder-RW\
3. Open VisualView from Desktop shortcut icon, or execute Configure.exe
from install directory. -> calc.exe

+++++

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