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AUSCERT External Security Bulletin Redistribution
ESB-2020.1844
Advisory (icsa-20-142-02) Schneider Electric EcoStruxure
Operator Terminal Expert
25 May 2020
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AusCERT Security Bulletin Summary
---------------------------------
Product: Schneider Electric EcoStruxure Operator Terminal Expert
Publisher: US-CERT
Operating System: Windows
Impact/Access: Execute Arbitrary Code/Commands -- Remote with User Interaction
Unauthorised Access -- Remote with User Interaction
Resolution: Patch/Upgrade
CVE Names: CVE-2020-7497 CVE-2020-7496 CVE-2020-7495
CVE-2020-7494 CVE-2020-7493
Original Bulletin:
https://www.us-cert.gov/ics/advisories/icsa-20-142-02
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ICS Advisory (ICSA-20-142-02)
Schneider Electric EcoStruxure Operator Terminal Expert
Original release date: May 21, 2020
Legal Notice
All information products included in https://us-cert.gov/ics 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 https://www.us-cert.gov/tlp/ .
1. EXECUTIVE SUMMARY
o CVSS v3 8.6
o ATTENTION: Low skill level to exploit/public exploits are available
o Vendor: Schneider Electric
o Equipment: EcoStruxure Operator Terminal Expert
o Vulnerabilities: SQL Injection, Path Traversal, Argument Injection
2. RISK EVALUATION
Successful exploitation of these vulnerabilities could allow unauthorized write
access or remote code execution.
3. TECHNICAL DETAILS
3.1 AFFECTED PRODUCTS
Schneider Electric reports these vulnerabilities affect the following
EcoStruxure products:
o EcoStruxure Operator Terminal Expert 3.1 Service Pack 1 and prior (formerly
known as Vijeo XD)
3.2 VULNERABILITY OVERVIEW
3.2.1 SQL INJECTION CWE-89
An attacker could exploit an SQL injection vulnerability by enticing a user to
open a maliciously crafted project file.
CVE-2020-7493 has been assigned to this vulnerability. A CVSS v3 base score of
8.6 has been calculated; the CVSS vector string is ( AV:L/AC:L/PR:N/UI:R/S:C/
C:H/I:H/A:H ).
3.2.2 PATH TRAVERSAL CWE-22
An attacker could exploit this path traversal vulnerability by getting a user
to visit a malicious page or open a malicious file.
CVE-2020-7494 has been assigned to this vulnerability. A CVSS v3 base score of
7.7 has been calculated; the CVSS vector string is ( AV:L/AC:H/PR:N/UI:R/S:C/
C:H/I:H/A:H ).
3.2.3 PATH TRAVERSAL CWE-22
An attacker could exploit this path traversal vulnerability by getting a user
to visit a malicious page or open a malicious file.
CVE-2020-7495 has been assigned to this vulnerability. A CVSS v3 base score of
3.3 has been calculated; the CVSS vector string is ( AV:L/AC:L/PR:N/UI:R/S:U/
C:N/I:L/A:N ).
3.2.4 ARGUMENT INJECTION CWE-88
A remote attacker can trick a victim to open a specially crafted project file
and gain unauthorized write access to the target system.
CVE-2020-7496 has been assigned to this vulnerability. A CVSS v3 base score of
3.3 has been calculated; the CVSS vector string is ( AV:L/AC:L/PR:N/UI:R/S:U/
C:N/I:L/A:N ).
3.2.5 PATH TRAVERSAL CWE-22
A vulnerability exists that could cause arbitrary application execution when
the computer starts.
CVE-2020-7497 has been assigned to this vulnerability. A CVSS v3 base score of
6.3 has been calculated; the CVSS vector string is ( AV:L/AC:H/PR:H/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
The following researchers reported these vulnerabilities to Schneider Electric:
o Sharon Brizinov and Amir Preminger of Claroty Research working with Trend
Micro's Zero Day Initiative.
o Steven Seeley and Chris Anastasio of Incite Team working with Trend Micro's
Zero Day Initiative
o Fredrik Ostrem (Cognite), Emil Sandsto (Cognite), and Cim Stordal (Cognite)
4. MITIGATIONS
Schneider Electric recommends users update to EcoStruxure Operator Terminal
Expert Version 3.1 Service Pack 1A . Schneider Electric offers two methods to
get the update:
In addition to the update, Schneider Electric also recommends the following
workarounds and mitigations to reduce the risk:
o Use EcoStruxure Operator Terminal Expert software only on a trusted
workstation.
o Do not execute EcoStruxure Operator Terminal Expert software with Windows
administrator privileges.
o Harden workstation following the best cybersecurity practices (antivirus,
updated operating systems, strong password policies, application
whitelisting software, etc.) and secure network using Schneider Electric's
Cybersecurity Best Practices .
o Manage your project file securely to avoid information disclosure or
unexpected modifications of data.
o Only accept project files from trusted users.
o Use project password when saving the project file.
o User's password in the application should be configured as a strong
password according with the "use complex password" function described in
the section titled "Security / Settings / use complex password."
For more information on these vulnerabilities and updates, please see
SEVD-2020-133-04
CISA recommends 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.
CISA reminds organizations to perform proper impact analysis and risk
assessment prior to deploying defensive measures.
CISA 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
on the ICS webpage on us-cert.gov 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 CISA for tracking
and correlation against other incidents.
These vulnerabilities are not exploitable remotely.
For any questions related to this report, please contact the CISA at:
Email: CISAservicedesk@cisa.dhs.gov
Toll Free: 1-888-282-0870
CISA continuously strives to improve its products and services. You can help by
choosing one of the links below to provide feedback about this product.
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