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Full Disclosure: Sielco Sistemi Winlog SCADA Software Insecure Library Loading Allows Code Execution
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Sielco Sistemi Winlog SCADA Software Insecure Library Loading Allows Code Execution
From: Karn Ganeshen <karnganeshen () gmail com>
Date: Thu, 06 Apr 2017 19:43:50 +0000

Sielco Sistemi Winlog SCADA Software Insecure Library Loading Allows Code
Execution

Vendor: Sielco Sistemi
Equipment: Winlog SCADA Software
Vulnerability: Uncontrolled Search Path Element

ICS-CERT Advisory
https://ics-cert.us-cert.gov/advisories/ICSA-17-038-01

AFFECTED PRODUCTS

The following Sielco Sistemi products are affected:

Winlog Lite SCADA Software, versions prior to Version 3.02.01, and
Winlog Pro SCADA Software, versions prior to Version 3.02.01

Vulnerable Libraries:
[+] applicom.dll
[+] w95_s7m.dll

Application Executables (that look for missing DLL):
PManager.exe
Runtime.exe

Steps to reproduce

1. Generate a dll payload
msfvenom 鈥損 windows/exec cmd=calc.exe 鈥揻 dll 鈥搊 applicom.dll

2. Place this dll in install directory (or C:\Windows, or any directory
defined in the PATH environment variable)
C:\evil-rw-folder\>

3. Run PManager.exe (or Runtime.exe) > calc.exe will execute


IMPACT

Successful exploitation of this vulnerability may allow an attacker to load
a malicious DLL and execute code on the affected system with the same
privileges as the application that loaded the malicious DLL.

VULNERABILITY OVERVIEW
UNCONTROLLED SEARCH PATH ELEMENT (CWE-427)

An uncontrolled search path element (DLL Hijacking) vulnerability has been
identified. Exploitation of this vulnerability could give an attacker
access to the system with the same level of privilege as the application
that utilizes the malicious DLL.

CVE-2017-5161 has been assigned to this vulnerability. A CVSS v3 base score
of 7.2 has been assigned; the CVSS vector string is
(AV:L/AC:H/PR:H/UI:R/S:C/C:H/I:H/A:H).

+++++

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