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Schneider Electric has a migration plan to handle path traversal, unrestricted upload of file with dangerous type, and XXE vulnerabilities in its IIoT Monitor, according to a report with NCCIC.

Successful exploitation of these remotely exploitable vulnerabilities could allow a remote attacker to access files available to system users, arbitrarily upload and execute malicious files, and embed incorrect documents into the system output to expose restricted information.

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A monitoring platform, IIoT Monitor Versions 3.1.38 and prior suffer from the vulnerabilities, discovered by Trend Micro’s Zero Day Initiative working with rgod.

In one issue, a path traversal vulnerability exists, which may allow access to files available to SYSTEM user.

Cyber Security

CVE-2018-7835 is the case number assigned to this vulnerability, which has a CVSS v3 base score of 7.5.

In addition, an unrestricted upload of a file with dangerous type vulnerability exists in the IIoT Monitor software that could allow the uploading and execution of malicious files.

CVE-2018-7836 is the case number assigned to this vulnerability, which has a CVSS v3 base score of 9.3.

Also, there is an XXE vulnerability in the IIoT Monitor software that may allow the software to resolve documents outside of the intended sphere of control, causing the software to embed incorrect documents into its output and expose restricted information.

CVE-2018-7837 is the case number assigned to this vulnerability, which has a CVSS v3 base score of 7.5.

The product sees use mainly in the commercial facilities, critical manufacturing, energy, and transportation services sectors. It also sees action on a global basis.

No known public exploits specifically target these vulnerabilities. However, an attacker with low skill level could leverage the vulnerabilities.

Schneider Electric recommends affected users contact Schneider Electric customer support for assistance in migrating to the latest software to resolve the issues.

Schneider Electric also released a security notification.

Schneider Electric recommends implementing industry cybersecurity best practices, such as:
• Locate control and safety system networks and remote devices behind firewalls, and isolate them from the business network.
• Physical controls should be in place so no unauthorized person would have access to the ICS and safety controllers, peripheral equipment or the ICS and safety networks.
• All controllers should reside in locked cabinets and never be left in the “Program” mode.
• All programming software should be kept in locked cabinets and should never be connected to any network other than the network for the devices that it is intended.
• All methods of mobile data exchange with the isolated network such as CDs, USB drives, etc. should be scanned before use in the terminals or any node connected to these networks.
• Laptops that have connected to any other network besides the intended network should never be allowed to connect to the safety or control networks without proper sanitation.
• Minimize network exposure for all control system devices and/or systems, and ensure they are not accessible from the Internet.
• 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.

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