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AUSCERT External Security Bulletin Redistribution
ESB-2023.1792
ICS Advisory (ICSA-23-082-04) Schneider Electric IGSS
24 March 2023
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AusCERT Security Bulletin Summary
---------------------------------
Product: Schneider Electric IGSS
Publisher: ICS-CERT
Operating System: Network Appliance
Resolution: Patch/Upgrade
CVE Names: CVE-2023-27984 CVE-2023-27983 CVE-2023-27982
CVE-2023-27981 CVE-2023-27980 CVE-2023-27979
CVE-2023-27978 CVE-2023-27977
Original Bulletin:
https://www.cisa.gov/news-events/ics-advisories/icsa-23-082-04
Comment: CVSS (Max): 8.8 CVE-2023-27982 (CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H)
CVSS Source: ICS-CERT
Calculator: https://www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
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ICS Advisory (ICSA-23-082-04)
Schneider Electric IGSS
Release Date
March 23, 2023
1. EXECUTIVE SUMMARY
o CVSS v3 8.8
o ATTENTION: Exploitable remotely/low attack complexity
o Vendor: Schneider Electric
o Equipment: IGSS (Interactive Graphical SCADA System)
o Vulnerabilities: Missing Authentication for Critical Function, Insufficient
Verification of Data Authenticity, Deserialization of Untrusted Data,
Improper Limitation of a Pathname to a Restricted Directory, and Improper
Input Validation
2. RISK EVALUATION
Successful exploitation of these vulnerabilities could result in a
denial-of-service condition, as well as the loss, addition, or modification of
dashboards or report files in the IGSS Report folder. Successful exploitation
of these vulnerabilities could also allow remote code execution, potentially
resulting in loss of control of the supervisory control and data acquisition
(SCADA) System with IGSS running in production mode.
3. TECHNICAL DETAILS
3.1 AFFECTED PRODUCTS
Schneider Electric reports these vulnerabilities affect the following Data
Server, Dashboard and Custom Reports modules for the IGSS (Interactive
Graphical SCADA System) product:
o IGSS Data Server (IGSSdataServer.exe): V16.0.0.23040 and prior
o IGSS Dashboard (DashBoard.exe): V16.0.0.23040 and prior
o Custom Reports (RMS16.dll): V16.0.0.23040 and prior
3.2 VULNERABILITY OVERVIEW
3.2.1 MISSING AUTHENTICATION FOR CRITICAL FUNCTION CWE-306
A vulnerability in Schneider Electric Data Server TCP interface could allow the
creation of a malicious report file in the IGSS project report directory, and
this could lead to remote code execution when an unsuspecting user opens the
malicious report.
CVE-2023-27980 has been assigned to this vulnerability. A CVSS v3 base score of
8.8 has been calculated; the CVSS vector string is ( AV:N/AC:L/PR:N/UI:R/S:U/
C:H/I:H/A:H ).
3.2.2 INSUFFICIENT VERIFICATION OF DATA AUTHENTICITY CWE-345
A vulnerability in Schneider Electric Data Server could cause manipulation of
dashboard files in the IGSS project report directory when an attacker sends
specific crafted messages to the Data Server TCP port. This could lead to
remote code execution if an unsuspecting user opens the malicious dashboard
file.
CVE-2023-27982 has been assigned to this vulnerability. A CVSS v3 base score of
8.8 has been calculated; the CVSS vector string is ( AV:N/AC:L/PR:N/UI:R/S:U/
C:H/I:H/A:H ).
3.2.3 DESERIALIZATION OF UNTRUSTED DATA CWE-502
A vulnerability in Schneider Electric Dashboard module could cause an
interpretation of malicious payload data if a malicious file is opened by an
unsuspecting user. This could lead to remote code execution.
CVE-2023-27978 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 ).
3.2.4 IMPROPER LIMITATION OF A PATHNAME TO A RESTRICTED DIRECTORY CWE-22
A vulnerability in Schneider Electric Custom Reports could cause remote code
execution if an unsuspecting user opens a malicious report.
CVE-2023-27981 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 ).
3.2.5 IMPROPER INPUT VALIDATION CWE-20
A vulnerability in Schneider Electric Custom Reports could result in macro
execution if a malicious report file is opened by an unsuspecting user,
potentially leading to remote code execution.
CVE-2023-27984 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 ).
3.2.6 INSUFFICIENT VERIFICATION OF DATA AUTHENTICITY CWE-345
A vulnerability in Schneider Electric Data Server could grant an unauthorized
user access to delete files in the IGSS project report directory if specific
crafted messages are sent to the Data Server TCP port.
CVE-2023-27977 has been assigned to this vulnerability. A CVSS v3 base score of
6.5 has been calculated; the CVSS vector string is ( AV:N/AC:L/PR:N/UI:N/S:U/
C:N/I:L/A:L ).
3.2.7 INSUFFICIENT VERIFICATION OF DATA AUTHENTICITY CWE-345
A vulnerability in Schneider Electric Data Server could allow an unauthorized
user to rename files in the IGSS project report directory. This could lead to a
denial-of-service condition if an attacker sends specific crafted messages to
the Data Server TCP port.
CVE-2023-27979 has been assigned to this vulnerability. A CVSS v3 base score of
6.5 has been calculated; the CVSS vector string is ( AV:N/AC:L/PR:N/UI:N/S:U/
C:N/I:L/A:L ).
3.2.8 MISSING AUTHENTICATION FOR CRITICAL FUNCTION CWE-306
A vulnerability in Schneider Electric Data Server TCP interface could allow
deletion of reports from the IGSS project report directory.
CVE-2023-27983 has been assigned to this vulnerability. A CVSS v3 base score of
6.5 has been calculated; the CVSS vector string is ( AV:N/AC:L/PR:N/UI:N/S:U/
C:N/I:L/A:L ).
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
Kimiya, working with Trend Micro Zero Day Initiative, reported these
vulnerabilities to Schneider Electric.
4. MITIGATIONS
Version 16.0.0.23041 of IGSS Data Server, Dashboard and Custom Reports (RMS)
includes corrections and mitigations for these vulnerabilities and is available
for download through IGSS Master > Update IGSS Software; the update is also
available directly from Schneider Electric .
Schneider Electric recommends that users use appropriate patching methodologies
when applying these patches to their systems. Schneider Electric strongly
recommends the use of back-ups and impact evaluating these patches in a test,
development, or offline infrastructure environment. Users can contact Schneider
Electric's Customer Care Center for additional assistance.
Additionally, if patching is not feasible, Schneider Electric recommends the
following mitigations to reduce the risk of vulnerability exploitation:
o Read the Security Guideline for IGSS on securing an IGSS
SCADA-installation.
o Ensure that the System Configuration module under Files, automatic backup
is enabled for file backup.
o Strip report output from Excel output. In the System Configuration module
under Reports, stripping of macros for the output engine can be enabled,
reducing the risk of distributing an unsafe report.
o Verify that devices are isolated on a private network and that firewalls
are configured with strict boundaries for devices that require remote
access.
Schneider Electric strongly recommends the following industry cybersecurity
best practices.
o Locate control and safety system networks and remote devices behind
firewalls and isolate them from the business network.
o Install physical controls to help prevent unauthorized users from accessing
industrial control and safety systems, components, peripheral equipment,
and networks.
o Place all controllers in locked cabinets, and do not leave them in the
"Program" mode.
o Only connect programming software to the network intended for that device.
o Scan all methods of mobile data exchange with the isolated network before
use in the terminals or nodes connected to these networks.
o Properly sanitize mobile devices that have connected to another network
before connecting to the intended network.
o Minimize network exposure for all control system devices and 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).
o For more information refer to the Schneider Electric Recommended
Cybersecurity Best Practices document .
For more information, see Schneider Electric security notification
SEVD-2023-073-04 .
CISA recommends users take defensive measures to minimize the risk of
exploitation of these vulnerabilities. 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 exploits specifically target these vulnerabilities. These
vulnerabilities are exploitable remotely. These vulnerabilities have low attack
complexity.
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