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 1. Home
 2. News & Events
 3. Cybersecurity Advisories
 4. ICS Advisory

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ICS Advisory


SCHNEIDER ELECTRIC ECOSTRUXURE OPERATOR TERMINAL EXPERT

Release Date
June 29, 2023
Alert Code
ICSA-23-180-02



1. EXECUTIVE SUMMARY

 * CVSS v3 7.8
 * ATTENTION: Low attack complexity/public exploits are available
 * Vendor: Schneider Electric
 * Equipment: EcoStruxure Operator Terminal Expert VXDZ
 * Vulnerability: Improper Control of Generation of Code ('Code Injection')


2. RISK EVALUATION

Successful exploitation of this vulnerability could allow an attacker to execute
arbitrary code and gain access to sensitive information on the machine.


3. TECHNICAL DETAILS


3.1 AFFECTED PRODUCTS

The following versions of Schneider Electric EcoStruxure Operator Terminal
Expert, a human machine interface (HMI) application, are affected:

 * EcoStruxure Operator Terminal Expert: Versions 3.3 SP1 and prior


3.2 VULNERABILITY OVERVIEW

3.2.1 IMPROPER CONTROL OF GENERATION OF CODE ('CODE INJECTION') CWE-94(link is
external)

Schneider Electric EcoStruxure operator Terminal Expert versions 3.3 SP1 and
prior are vulnerable to a code injection attack that could allow an attacker to
execute arbitrary code and gain access to all information on the machine.

CVE-2023-1049 has been assigned to this vulnerability. A CVSS v3 base score of
7.8 has been calculated; the CVSS vector string is
(AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H(link is external)).


3.3 BACKGROUND

 * CRITICAL INFRASTRUCTURE SECTORS: Commercial Facilities, Critical
   Manufacturing, Energy
 * COUNTRIES/AREAS DEPLOYED: Worldwide
 * COMPANY HEADQUARTERS LOCATION: France


3.4 RESEARCHER

Daan Keuper & Thijs Alkemade from Computest working with Trend Micro Zero Day
Initiative reported this vulnerability to CISA.


4. MITIGATIONS

Schneider Electric has released EcoStruxure Operation Terminal Expert v3.4(link
is external) for users to download.

Customers should use appropriate patching methodologies when applying these
patches to their systems. We strongly recommend the use of back-ups and
evaluating the impact of these patches in a Test and Development environment or
on an offline infrastructure. Contact Schneider Electric’s Customer Care
Center(link is external) if you need assistance removing a patch.

For more information, see Schneider Electric’s Advisory(link is external).

CISA recommends users take defensive measures to minimize the risk of
exploitation of this vulnerability. Specifically, users should:

 * Minimize network exposure for all control system devices and/or systems, and
   ensure they are not accessible from the Internet.
 * Locate control system networks and remote devices behind firewalls and
   isolate them from business networks.
 * When remote access is required, use secure methods, such as Virtual Private
   Networks (VPNs), recognizing VPNs may have vulnerabilities and should be
   updated to the most current version available. Also recognize VPN is only as
   secure as its connected devices.

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 at cisa.gov/ics. Several CISA products detailing cyber
defense best 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 at cisa.gov/ics in the technical information paper,
ICS-TIP-12-146-01B--Targeted Cyber Intrusion Detection and Mitigation
Strategies.

Organizations observing suspected malicious activity should follow established
internal procedures and report findings to CISA for tracking and correlation
against other incidents.

CISA also recommends users take the following measures to protect themselves
from social engineering attacks:

 * Do not click web links or open attachments in unsolicited email messages.
 * Refer to Recognizing and Avoiding Email Scams for more information on
   avoiding email scams.
 * Refer to Avoiding Social Engineering and Phishing Attacks for more
   information on social engineering attacks.

This vulnerability is not exploitable remotely.

This product is provided subject to this Notification and this Privacy &
Use policy.


VENDOR

Schneider Electric


PLEASE SHARE YOUR THOUGHTS

We recently updated our anonymous product survey; we’d welcome your feedback.


RELATED ADVISORIES

Jun 29, 2023
ICS Advisory | ICSA-23-180-03


OVARRO TBOX RTUS

Jun 29, 2023
ICS Advisory | ICSA-23-180-04


MITSUBISHI ELECTRIC MELSEC-F SERIES

Jun 29, 2023
ICS Advisory | ICSA-23-180-01


DELTA ELECTRONICS INFRASUITE DEVICE MASTER

Jun 27, 2023
ICS Advisory | ICSA-23-178-01


HITACHI ENERGY FOXMAN-UN AND UNEM PRODUCTS

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