EXECUTIVE SUMMARY

  • CVSS v3 9.0
  • ATTENTION: Exploitable remotely/low skill level to exploit
  • Vendor: Schneider Electric
  • Equipment: Pro-face GP-Pro EX
  • Vulnerability: Improper Input Validation

2. RISK EVALUATION

Successful exploitation of this vulnerability could allow an attacker to modify code to launch an arbitrary executable upon launch of the program.

3. TECHNICAL DETAILS

3.1 AFFECTED PRODUCTS

The following versions of Pro-face GP-Pro EX, an HMI screen editor and logic programming software, are affected:

  • Pro-face GP-Pro EX Version 4.08 and prior.

3.2 VULNERABILITY OVERVIEW

3.2.1   IMPROPER INPUT VALIDATION CWE-20

The program’s code contains an error in which an arbitrary executable can be launched.

CVE-2018-7832 has been assigned to this vulnerability. A CVSS v3 base score of 9.0 has been assigned; the CVSS vector string is (AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H).

3.3 BACKGROUND

  • CRITICAL INFRASTRUCTURE SECTORS: Energy
  • COUNTRIES/AREAS DEPLOYED: Worldwide
  • COMPANY HEADQUARTERS LOCATION: France

3.4 RESEARCHER

Yu Quiang of Venustech’s ADLab reported this vulnerability to NCCIC.

4. MITIGATIONS

Schneider Electric has produced Version 4.08.200 of the software. It can be downloaded from:

https://www.proface.com/en/topic/2018/1126_3

For more information, see Schneider Electric’s security bulletin at:

https://www.schneider-electric.com/en/download/document/SEVD-2018-354-02/

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

NCCIC reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures.

NCCIC also provides a section for control systems security recommended practices on the ICS-CERT web page. Several recommended 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-CERT website in the Technical Information Paper, ICS-TIP-12-146-01B–Targeted Cyber Intrusion Detection and Mitigation Strategies.

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

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

No known public exploits specifically target this vulnerability.

 

Source:

https://ics-cert.us-cert.gov/advisories/ICSA-19-003-01