Fuji Electric Monitouch V-SFT

CVSS v3 7.3

**ATTENTION:**Remotely exploitable/low skill level to exploit.

Vendor: Fuji Electric

Equipment: Monitouch V-SFT

Vulnerabilities: Stack-Based Buffer Overflow, Heap-Based Buffer Overflow, Improper Privilege Management

AFFECTED PRODUCTS

The following versions of Monitouch V-SFT, a screen configuration software, are affected:

• Monitouch V-SFT, versions prior to Version 5.4.43.0

IMPACT

Successful exploitation of these vulnerabilities could allow remote code execution or cause the software that the attacker is accessing to crash. The improper privilege management vulnerability could allow an attacker with local access to escalate privileges.

MITIGATION

Fuji Electric has released a new version of Monitouch V-SFT, Version 5.4.43.0, to fix these vulnerabilities. Users can download the update at the following location:

http://proself.hakko-elec.co.jp/public/qAW0wAxKdQoAj_0BP8ddt6DJIYPCHSIrxFA09Q5YfPMd

NCCIC/ICS-CERT recommends that users take defensive measures to minimize the risk of exploitation of these vulnerabilities. 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.

ICS-CERT reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures.

ICS-CERT 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 in the ICS‑CERT Technical Information Paper, ICS-TIP-12-146-01B–Targeted Cyber Intrusion Detection and Mitigation Strategies, that is available for download from the ICS-CERT web site.

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

No known public exploits specifically target these vulnerabilities.

VULNERABILITY OVERVIEW

STACK-BASED BUFFER OVERFLOW CWE-121

The stack-based buffer overflow vulnerability has been identified, which may cause a crash or allow remote code execution.

CVE-2017-9659 has been assigned to this vulnerability. A CVSS v3 base score of 7.3 has been assigned; the CVSS vector string is (AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L).

HEAP-BASED BUFFER OVERFLOW CWE-122

A heap-based buffer overflow vulnerability has been identified, which may cause a crash or allow remote code execution.

CVE-2017-9660 has been assigned to this vulnerability. A CVSS v3 base score of 7.3 has been assigned; the CVSS vector string is (AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L).

IMPROPER PRIVILEGE MANAGEMENT CWE-269

Monitouch V-SFT is installed in a directory with weak access controls by default, which could allow an authenticated attacker with local access to escalate privileges.

CVE-2017-9662 has been assigned to this vulnerability. A CVSS v3 base score of 4.5 has been assigned; the CVSS vector string is (AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L).

RESEARCHER

Independent researchers Fritz Sands and kimiya working with Trend Micro’s Zero Day Initiative identified these vulnerabilities.

BACKGROUND

Critical Infrastructure Sector: Critical Manufacturing, Energy

Countries/Areas Deployed: Worldwide

Company Headquarters Location: Japan