Vendor: Progea
Equipment: Movicon SCADA/HMI
Vulnerability: Uncontrolled Search Path Element, Unquoted Search Path or
Element

Advisory URL
https://ipositivesecurity.com/2017/10/28/ics-progea-movicon-scadahmi-vulnerabilities/

ICS-CERT Advisory
https://ics-cert.us-cert.gov/advisories/ICSA-17-290-01

CVE-ID
CVE-2017-14017
CVE-2017-14019

------------------------
AFFECTED PRODUCTS
------------------------
The following versions of Movicon HMI, an HMI software platform, are
affected:
Movicon Version 11.5.1181 and prior.

------------------------
BACKGROUND
------------------------
Critical Infrastructure Sectors: Critical Manufacturing, Energy, Food and
Agriculture, Transportation Systems, Water and Wastewater Systems
Countries/Areas Deployed: Europe, India, and United States
Company Headquarters Location: Italy


------------------------
IMPACT
------------------------
Successful exploitation of these vulnerabilities could allow privilege
escalation or arbitrary code execution.


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

UNCONTROLLED SEARCH PATH ELEMENT CWE-427
An uncontrolled search path element vulnerability has been identified,
which may allow a remote attacker without privileges to execute arbitrary
code in the form of a malicious DLL file.

This vulnerability allows remote attackers to execute arbitrary code on
vulnerable installations of Movicon SCADA/HMI. User interaction is required
to exploit this vulnerability in that the malicious dll file should be
saved in any of the DLL search paths.

The specific flaw exists within the handling of a specific named DLL file
used by Movicon SCADA/HMI. By placing specific DLL file (listed below), an
attacker is able to force the process to load an arbitrary DLL. This allows
an attacker to execute arbitrary code in the context of the process.

------------------------
DLL File Name (1)
------------------------
api-ms-win-appmodel-runtime-l1-1-0.dll

------------------------
Application Executables (that look for missing DLL)
------------------------
Movicon.exe
MoviconRunTime.exe
MoviconService.exe
AlarmsImpExp.exe
ReportViewerNET.exe

------------------------
Steps to reproduce
------------------------

1. Generate a dll payload
msfvenom ap windows/exec cmd=calc.exe af dll ao
api-ms-win-appmodel-runtime-l1-1-0.dll

2. Place this dll in install directory (or C:\Windows, or any directory
defined in the PATH environment variable)
C:\Program Files\Progea\Movicon11.5\

3. Run MoviconService.exe (or any of the above listed executables), and Exit

------------------------
CVE-2017-14017 has been assigned to this vulnerability. A CVSS v3 base
score of 6.8 has been assigned; the CVSS vector string is
(AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:H).


UNQUOTED SEARCH PATH OR ELEMENT CWE-428
An unquoted search path or element vulnerability has been identified, which
may allow an authorized local user to insert arbitrary code into the
unquoted service path and escalate his or her privileges.

A successful attempt would require the local user to be able to insert
their code in the system root path undetected by the OS or other security
applications where it could potentially be executed during application
startup or reboot. If successful, the local useras code would execute with
the elevated privileges of the application.

aC/ MOVICON (MOVICON) runs as LocalSystem and has path: C:\Program
Files\Progea\Movicon11.5\MoviconService.exe:

CVE-2017-14019 has been assigned to this vulnerability. A CVSS v3 base
score of 6.5 has been assigned; the CVSS vector string is
(AV:L/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:H).

+++++

Best Regards,
Karn Ganeshen