Full Report
View CSAF 1. EXECUTIVE SUMMARY CVSS v4 6.8 ATTENTION: Low attack complexity Vendor: Schneider Electric Equipment: Uni-Telway Driver Vulnerability: Improper Input Validation 2. RISK EVALUATION Successful exploitation of this vulnerability could allow an attacker to perform a denial of service. 3. TECHNICAL DETAILS 3.1 AFFECTED PRODUCTS Schneider Electric reports the following products are affected: Schneider Electric Uni-Telway Driver: All versions Schneider Electric Uni-Telway Driver installed on Control Expert: All versions Schneider Electric Uni-Telway Driver installed on Process Expert: All versions Schneider Electric Uni-Telway Driver installed on Process Expert for AVEVA System Platform: All versions Schneider Electric Uni-Telway Driver installed on OPC Factory Server: All versions 3.2 VULNERABILITY OVERVIEW 3.2.1 IMPROPER INPUT VALIDATION CWE-20 Schneider Electric Uni-Telway Driver is vulnerable to an improper input validation vulnerability that could cause denial-of-service of engineering workstations when a specific driver interface is invoked locally by an authenticated user with crafted input. CVE-2024-10083 has been assigned to this vulnerability. A CVSS v3 base score of 5.5 has been calculated; the CVSS vector string is (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H). A CVSS v4 score has also been calculated for CVE-2024-10083. A base score of 6.8 has been calculated; the CVSS vector string is (AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N). 3.3 BACKGROUND CRITICAL INFRASTRUCTURE SECTORS: Commercial Facilities, Critical Manufacturing, Energy COUNTRIES/AREAS DEPLOYED: Worldwide COMPANY HEADQUARTERS LOCATION: France 3.4 RESEARCHER Sangjun Park, Jongseoung Kim, Byunghyun Kang, Yunjin Park, Albert Einstein, Kwon Yul, Seungchan Kim of today-0day reported this vulnerability to Schneider Electric. 4. MITIGATIONS Schneider Electric has identified the following specific workarounds and mitigations users can apply to reduce risk: For users requiring the use of Uni-Telway Driver, Schneider Electric recommends using following mitigations to reduce the risk of exploit: McAfee Application and Change Control software for application control. Refer to the Cybersecurity Application Note available https://www.se.com/ww/en/download/document/EIO0000004778/. Follow workstation, network, and site-hardening guidelines in the Schneider Electric Recommended Cybersecurity Best Practices document. For users not requiring the use of Uni-Telway driver, Schneider Electric recommends uninstalling the driver. Version 16.1 of EcoStruxure Control Expert does not include Uni-Telway driver by default anymore. This vulnerability is only affecting users who have installed Uni-Telway driver. To ensure users are informed of all updates, including details on affected products and remediation plans, subscribe to Schneider Electric's security notification service here: https://www.se.com/ww/en/work/support/cybersecurity/security-notifications.jsp For more information see the associated Schneider Electric CPCERT security advisory SEVD-2025-042-02 Uni-Telway driver used in EcoStruxureTM Control Expert, EcoStruxureTM Process - SEVD-2025-042-02 PDF Version, Uni-Telway driver used in EcoStruxureTM Control Expert, EcoStruxureTM Process - SEVD-2025-042-02 CSAF Version. CISA recommends users take defensive measures to minimize the risk of exploitation of this vulnerability, such as: Minimize network exposure for all control system devices and/or systems, ensuring they are not accessible from the Internet. Locate control system networks and remote devices behind firewalls and isolating them from business networks. When remote access is required, use more secure methods, such as Virtual Private Networks (VPNs). Recognize VPNs may have vulnerabilities, should be updated to the most recent version available, and are only as secure as the 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 on cisa.gov. 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. CISA encourages organizations to implement recommended cybersecurity strategies for proactive defense of ICS assets. Additional mitigation guidance and recommended practices are publicly available on the ICS webpage at cisa.gov 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. 5. UPDATE HISTORY March 11, 2025: Initial Publication
Analysis Summary
# Vulnerability: Improper Input Validation in Schneider Electric Uni-Telway Driver leading to Denial of Service
## CVE Details
- CVE ID: CVE-2024-10083
- CVSS Score: 6.8 (High, based on v4) / 5.5 (Medium, based on v3)
- CWE: Improper Input Validation
## Affected Systems
- Products: Schneider Electric Uni-Telway Driver, Control Expert, Process Expert, Process Expert for AVEVA System Platform, OPC Factory Server.
- Versions: All versions of the Uni-Telway Driver.
- Configurations: Affects users who have installed the Uni-Telway driver. Exploitation requires local access by an authenticated user invoking a specific driver interface.
## Vulnerability Description
The Schneider Electric Uni-Telway Driver is vulnerable to an Improper Input Validation flaw. Successful exploitation occurs when a locally authenticated user provides crafted input to a specific driver interface, which could lead to a Denial of Service (DoS) condition on the engineering workstation.
## Exploitation
- Status: No known public exploitation specifically targeting this vulnerability has been reported to CISA at this time.
- Complexity: Low (Stated as "Low attack complexity" in the executive summary).
- Attack Vector: Local (AV:L). Exploitation requires the attacker to be locally present and authenticated.
## Impact
- Confidentiality: No impact (C:N in CVSS v3)
- Integrity: No impact (I:N in CVSS v3)
- Availability: High Impact (A:H in CVSS v3.1, VA:H in CVSS v4.0) - leads to Denial of Service.
## Remediation
### Patches
No specific patches or fixed versions are explicitly listed in the provided text. Users are directed to subscribe to Schneider Electric's security notification service for updates: `https://www.se.com/ww/en/work/support/cybersecurity/security-notifications.jsp`
### Workarounds
1. **Uninstall:** For users not requiring the Uni-Telway driver, Schneider Electric recommends uninstalling the driver. (Note: Version 16.1 of EcoStruxure Control Expert no longer includes it by default.)
2. **Application Control:** Utilize McAfee Application and Change Control software for application control. Refer to the Cybersecurity Application Note: `https://www.se.com/ww/en/download/document/EIO0000004778/`
3. **Hardening:** Follow workstation, network, and site-hardening guidelines outlined in the Schneider Electric Recommended Cybersecurity Best Practices document.
4. **Network Segmentation (CISA General Guidance):**
* Minimize network exposure for all control system devices and systems, ensuring they are not accessible from the Internet.
* Locate control system networks and remote devices behind firewalls and isolate them from business networks.
* Use secure methods like updated VPNs when remote access is necessary.
## Detection
- Indicators of Compromise (IoC): Not explicitly detailed, but successful exploitation results in Denial of Service of the engineering workstation.
- Detection methods and tools: Organizations should monitor for abnormal events related to the invocation of the specific driver interface under local user context. General ICS security monitoring practices should be applied.
## References
- Vendor Advisory: Schneider Electric CPCERT security advisory SEVD-2025-042-02
- CISA Advisory Link (Example PDF): `https://download.schneider-electric.com/files?p_Doc_Ref=SEVD-2025-042-02&p_enDocType=Security+and+Safety+Notice&p_File_Name=SEVD-2025-042-02.pdf`
- CISA Advisory Link (Example CSAF JSON): `https://download.schneider-electric.com/files?p_Doc_Ref=SEVD-2025-042-02&p_enDocType=Security+and+Safety+Notice&p_File_Name=sevd-2025-042-02.json`