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

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ICS Advisory


GE DIGITAL CIMPLICITY

Release Date
August 31, 2023
Alert Code
ICSA-23-243-02



1. EXECUTIVE SUMMARY

 * CVSS v3 7.8
 * ATTENTION: Low attack complexity
 * Vendor: GE Digital
 * Equipment: CIMPLICITY
 * Vulnerability: Process Control


2. RISK EVALUATION

Successful exploitation of this vulnerability could allow a low-privileged local
attacker to escalate privileges to SYSTEM.


3. TECHNICAL DETAILS


3.1 AFFECTED PRODUCTS

The following GE products are affected: 

 * GE Digital CIMPLICITY: v2023


3.2 VULNERABILITY OVERVIEW

3.2.1 PROCESS CONTROL CWE-114(link is external)

GE CIMPLICITY 2023 is by a process control vulnerability, which could allow a
local attacker to insert malicious configuration files in the expected web
server execution path to escalate privileges and gain full control of the HMI
software.

CVE-2023-4487 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:L/UI:N/S:U/C:H/I:H/A:H(link is external)).


3.3 BACKGROUND

 * CRITICAL INFRASTRUCTURE SECTORS: Multiple Sectors
 * COUNTRIES/AREAS DEPLOYED: Worldwide
 * COMPANY HEADQUARTERS LOCATION: United States


3.4 RESEARCHER

Michael Heinzl reported this vulnerability to CISA.


4. MITIGATIONS

GE Digital recommends users apply the following mitigations:

 * Update CIMPLICITY to v2023 SIM 1(link is external) (login is required)

Please refer to GE Digital’s security bulletin(link is external) (login is
required) for more information.

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.
 * Exercise principles of least privilege.

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.

No known public exploitation specifically targeting this vulnerability has been
reported to CISA at this time. This vulnerability is not exploitable remotely.

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


VENDOR

GE Digital


PLEASE SHARE YOUR THOUGHTS

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


RELATED ADVISORIES

Aug 31, 2023
ICS Advisory | ICSA-23-243-01


ARDEREG SISTEMAS SCADA

Aug 31, 2023
ICS Advisory | ICSA-23-243-03


PTC KEPWARE KEPSERVEREX

Aug 31, 2023
ICS Advisory | ICSA-23-243-04


DIGI REALPORT PROTOCOL

Aug 29, 2023
ICS Advisory | ICSA-23-241-01


PTC CODEBEAMER

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