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AUSCERT External Security Bulletin Redistribution
ESB-2019.2580
Advisory (icsa-19-192-06) Schneider Electric Interactive
Graphical SCADA System
12 July 2019
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AusCERT Security Bulletin Summary
---------------------------------
Product: Schneider Electric Interactive Graphical SCADA System
Publisher: ICS-CERT
Operating System: Windows
Impact/Access: Execute Arbitrary Code/Commands -- Existing Account
Denial of Service -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2019-6827
Original Bulletin:
https://www.us-cert.gov/ics/advisories/icsa-19-192-06
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ICS Advisory (ICSA-19-192-06)
Schneider Electric Interactive Graphical SCADA System
Original release date: July 11, 2019
Legal Notice
All information products included in http://ics-cert.us-cert.gov are
provided"as is" for informational purposes only. The Department of Homeland
Security (DHS) does not provide any warranties of any kind regarding any
information contained within. DHS does not endorse any commercial product or
service, referenced in this product or otherwise. Further dissemination of this
product is governed by the Traffic Light Protocol (TLP) marking in the header.
For more information about TLP, see http://www.us-cert.gov/tlp/ .
1. EXECUTIVE SUMMARY
o CVSS v3 7.0
o Vendor: Schneider Electric
o Equipment: Interactive Graphical SCADA System (IGSS)
o Vulnerability: Out-of-Bounds Write
2. RISK EVALUATION
Successful exploitation of this vulnerability could allow an attacker to
achieve arbitrary code execution or crash the software.
3. TECHNICAL DETAILS
3.1 AFFECTED PRODUCTS
The following versions of IGSS are affected:
o IGSS Version 14 and prior
3.2 VULNERABILITY OVERVIEW
3.2.1 OUT-OF-BOUNDS WRITE CWE-787
An out-of-bounds vulnerability exists and could be exploited by the application
processing a specially crafted project file. Exploitation could cause a
software crash when data in the mdb database is manipulated or allow code
execution.
CVE-2019-6827 has been assigned to this vulnerability. A CVSS v3 base score of
7.0 has been calculated; the CVSS vector string is ( AV:L/AC:H/PR:N/UI:R/S:U/
C:H/I:H/A:H ).
3.3 BACKGROUND
o CRITICAL INFRASTRUCTURE SECTORS: Commercial Facilities, Critical
Manufacturing, Energy
o COUNTRIES/AREAS DEPLOYED: Worldwide
o COMPANY HEADQUARTERS LOCATION: France
3.4 RESEARCHER
mdm and rgod of 9SG Security Team working with Trend Micro Zero Day Initiative
reported this vulnerability to NCCIC.
4. MITIGATIONS
Schneider Electric recommends upgrading to Version 13.0.0.19140 or
14.0.0.19120, which can be downloaded here:
http://igss.schneider-electric.com/products/igss/download/
licensed-versions.aspx
The following workarounds and mitigations can be applied by users to reduce the
risk:
o Do not allow untrusted access to the configuration database (mdb) and
update IGSS to the latest version of IGSS, either Version 13 or Version 14.
o A restart of the software is required, but a reboot of the system is not
required.
Schneider Electric General Security Recommendations:
o Locate control and safety system networks and remote devices behind
firewalls and isolate them from the business network.
o Physical controls should be in place so that no unauthorized person would
have access to the ICS and safety controllers, peripheral equipment, or the
ICS and safety networks.
o All controllers should reside in locked cabinets and never be left in
"Program" mode.
o All programming software should be kept in locked cabinets and should never
be connected to any network other than the network intended for the
devices.
o All methods of mobile data exchange with the isolated network, such as CDs,
USB drives, etc., should be scanned before use in the terminals or any node
connected to these networks.
o Laptops that have connected to any other network besides the intended
network should never be allowed to connect to the safety or control
networks without proper sanitation.
o Minimize network exposure for all control system devices and/or systems and
ensure that they are not accessible from the Internet.
o When remote access is required, use secure methods such as virtual private
networks (VPNs), recognizing that VPNs may have vulnerabilities and should
be updated to the most current version available. Also recognize that VPN
is only as secure as the connected devices.
For more information, please see Schneider Electric advisory: SEVD-2019-190-02
NCCIC also recommends that users take the following measures to protect
themselves from social engineering attacks:
o Do not click web links or open unsolicited attachments in email messages.
o Refer to Recognizing and Avoiding Email Scams for more information on
avoiding email scams.
o Refer to Avoiding Social Engineering and Phishing Attacks for more
information on social engineering attacks.
NCCIC reminds organizations to perform proper impact analysis and risk
assessment prior to deploying defensive measures.
NCCIC also provides a section for control systems security recommended
practices on the ICS webpage on us-cert.gov . Several recommended practices are
available for reading and download, including Improving Industrial Control
Systems Cybersecurity with Defense-in-Depth Strategies .
Additional mitigation guidance and recommended practices are publicly available
in the Technical Information Paper, ICS-TIP-12-146-01B--Targeted Cyber
Intrusion Detection and Mitigation Strategies .
Organizations observing any suspected malicious activity should follow their
established internal procedures and report their findings to NCCIC for tracking
and correlation against other incidents.
No known public exploits specifically target this vulnerability. This
vulnerability is not exploitable remotely. High skill level is needed to
exploit.
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