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Subject: [FD] =?utf-8?q?=5BICS=5D_Solar_Controls_Heating_Control_Downloade?= =?utf-8?q?r_=E2=80=93_Insecure_L
From: Karn Ganeshen <karnganeshen () gmail ! com>
Date: 2017-08-31 23:49:08
Message-ID: CAB8+WF3knya_Xkq+jSeF8j4=ozcs4u4wYFupu=nW6KLJhNFKHg () mail ! gmail ! com
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Vendor: Solar Controls
Equipment: Heating Control Downloader (HCDownloader)
Vulnerability: Uncontrolled Search Path Element
Advisory URL:
https://ipositivesecurity.com/2017/09/01/ics-solar-controls-heating-control-downloader-insecure-library-loading-allows-code-execution/
ICS-CERT Advisory
https://ics-cert.us-cert.gov/advisories/ICSA-17-222-02
------------------------
AFFECTED PRODUCTS
------------------------
The following versions of Solar Controls' Heating Control Downloader
(HCDownloader) are affected:
HCDownloader, Version 1.0.1.15 and prior.
------------------------
BACKGROUND
------------------------
Critical Infrastructure Sector(s): Energy
Countries/Areas Deployed: Unknown
Company Headquarters Location: Czech Republic
------------------------
IMPACT
------------------------
Successful exploitation of this vulnerability may allow arbitrary code
execution.
------------------------
VULNERABILITY OVERVIEW
------------------------
UNCONTROLLED SEARCH PATH ELEMENT CWE-427
An uncontrolled search path element has been identified, which could allow
an attacker to execute arbitrary code on a target system using a malicious
DLL file.
CVE-2017-9646 has been assigned to this vulnerability. A CVSS v3 base score
of 7.8 has been assigned; the CVSS vector string is
(AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H).
------------------------
Missing Libraries
------------------------
ftd2xx.dll
------------------------
Application Executables (that look for missing DLL)
------------------------
HCDownloader.exe
------------------------
Steps to reproduce
------------------------
1. Generate a dll payload
msfvenom –p windows/exec cmd=calc.exe –f dll –o ftd2xx.dll
2. Place this dll in any directory defined in the PATH environment variable
C:\app-folder-RW\
3. Run HCDownloader.exe -> calc.exe executes
+++++
Best Regards,
Karn Ganeshen
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