1. EXECUTIVE SUMMARY
- CVSS v3 7.8
- ATTENTION: low attack complexity
- Vendor: Schneider Electric
- Equipment: IGSS (Interactive Graphical SCADA System)
- Vulnerability: Deserialization of Untrusted Data
2. RISK EVALUATION
Successful exploitation of this vulnerability may allow arbitrary code execution or loss of control of the SCADA system.
3. TECHNICAL DETAILS
3.1 AFFECTED PRODUCTS
Schneider Electric reports this vulnerability affects the following IGSS (Interactive Graphical SCADA System) products:
3.2 VULNERABILITY OVERVIEW
3.2.1 DESERIALIZATION OF UNTRUSTED DATA CWE-502
A deserialization of untrusted data vulnerability exists in the Dashboard module that could cause an interpretation of malicious payload data, potentially leading to arbitrary code execution when an attacker gets the user to open a malicious file.
CVE-2023-3001 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).
3.3 BACKGROUND
- CRITICAL INFRASTRUCTURE SECTORS: Commercial Facilities, Critical Manufacturing, Energy
- COUNTRIES/AREAS DEPLOYED: Worldwide
- COMPANY HEADQUARTERS LOCATION: France
3.4 RESEARCHER
Sina Kheirkhah (@SinSinology) of Summoning Team (@SummoningTeam) working with Trend Micro Zero Day Initiative reported this vulnerability to Schneider Electric and CISA.
4. MITIGATIONS
Schneider Electric has provided version 16.0.0.23131 of Dashboard to address these vulnerabilities. The update is available for download through IGSS Master > Update IGSS Software or from the Schneider Electric support page.
If users choose not to apply the remediation provided above, they should immediately apply the following mitigations to reduce the risk of exploit:
- Review and implement the security guideline for IGSS on securing an IGSS SCADA installation.
- Follow the general security recommendation below and verify that devices are isolated on a private network and that firewalls are configured with strict boundaries for devices that require remote access.
For more information, see the Schneider Electric security notification SEVD-2023-164-02.
Schneider Electric recommends the following industry cybersecurity best practices.
- Locate control and safety system networks and remote devices behind firewalls and isolate them from the business network.
- Install physical controls so no unauthorized personnel can access your industrial control and safety systems, components, peripheral equipment, and networks.
- Place all controllers in locked cabinets and never leave them in the “Program” mode.
- Never connect programming software to any network other than the network intended for that device.
- Scan all methods of mobile data exchange with the isolated network such as CDs, USB drives, etc. before use in the terminals or any node connected to these networks.
- Never allow mobile devices that have connected to any other network besides the intended network to connect to the safety or control networks without proper sanitation.
- Minimize network exposure for all control system devices and systems and ensure that they are not accessible from the internet.
- When remote access is required, use secure methods, such as virtual private networks (VPNs). Recognize that VPNs may have vulnerabilities and should be updated to the most current version available. Also, understand that VPNs are only as secure as the connected devices.
CISA recommends users take defensive measures to minimize the risk of exploitation of this vulnerability. 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:
No known public exploits specifically target this vulnerability. This vulnerability is not exploitable remotely. This vulnerability has low attack complexity.