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Date: Tue, 27 Jun 2017 23:31:22 +0000
From: Karn Ganeshen <karnganeshen@...il.com>
To: "fulldisclosure@...lists.org" <fulldisclosure@...lists.org>
Subject: [FD] Schneider Electric Interactive Graphical SCADA System Software – Insecure Library Loading Allows Code Execution

Vendor: Schneider Electric
Equipment: Interactive Graphical SCADA System (IGSS) Software
Vulnerability: DLL Hijacking
Advisory URL:
https://ipositivesecurity.com/2017/05/18/ics-schneider-electric-interactive-graphical-scada-system-software-insecure-library-loading-allows-code-execution/

ICS-CERT Advisory
https://ics-cert.us-cert.gov/advisories/ICSA-17-094-01

------------------------
AFFECTED PRODUCTS
------------------------
Schneider Electric reports that the vulnerability affects the following
IGSS HMI desktop application:
IGSS Software, Version 12 and previous versions.

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

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

UNCONTROLLED SEARCH PATH ELEMENT CWE-427
The software will execute a malicious file if it is named the same as a
legitimate file and placed in a location that is earlier in the search path.

CVE-2017-6033 has been assigned to this vulnerability. A CVSS v3 base score
of 6.8 has been calculated; the CVSS vector string is
(AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:H).

------------------------
Vulnerable Libraries:
------------------------
msjet48.dll
msjet47.dll
msjet46.dll
msjet45.dll
msjet44.dll
msjet43.dll
msjet42.dll
msjet41.dll
hhctrl.ocx

------------------------
Application Executables (that look for missing DLL):
------------------------
igss.exe
igss_dde.exe
IGSSdataServer.exe
genhdm.exe
mre.exe
RsLinxTo7TABSLC.exe
WinBROWSE.exe

------------------------
Application Executables (that look for missing OCX):
------------------------
errcode.exe
def.exe
chelm.exe

------------------------
Steps to reproduce
------------------------
1. Generate a dll payload
msfvenom –p windows/exec cmd=calc.exe –f dll –o msjet41.dll
2. Place this dll (or any of above listed dlls) in install directory (or
C:\Windows, or any directory defined in the PATH environment variable)
C:\app-folder-RW\
3. Run igss.exe -> calc.exe will execute

+++++

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