Moxa MXview One Series Security Advisory: Key Vulnerabilities and Mitigations

Greetings, WindowsForum.com community! Let’s dive into the key security advisory around Moxa's MXview One series and their Central Manager products.

Executive Summary​

This advisory, rated with a CVSS v4 score of 6.8, highlights several vulnerabilities within the MXview One and MXview One Central Manager Series software from Moxa. These vulnerabilities can be exploited remotely and have low attack complexity, meaning even less-skilled attackers could potentially exploit them. Here’s a breakdown:

• Vendor: Moxa
• Equipment: MXview One, MXview One Central Manager Series
• Vulnerabilities: Cleartext Storage In A File or On Disk (CWE-313), Path Traversal (CWE-24), Time-of-Check Time-of-Use Race Condition (CWE-367)
• Potential Impact: Expose local credentials, write arbitrary files leading to malicious code execution

Risk Evaluation​

These vulnerabilities provide multiple attack vectors that could allow an attacker to compromise local credentials, manipulate system files, and execute malicious code, significantly impacting system integrity and security.

Technical Details​

Affected Products​

• Moxa MXview One Series: Versions 1.4.0 and prior
• Moxa MXview One Central Manager Series: Version 1.0.0

Vulnerability Overview​

1. Cleartext Storage In A File or On Disk (CWE-313)​

Impact: Configuration files storing credentials in cleartext can be read or modified by an attacker with local access rights. This could lead to sensitive information exposure and potential misuse.
CVEs & Scores:

• CVE-2024-6785: CVSS v3.1 score of 5.5, CVSS v4 score of 6.8

2. Path Traversal (CWE-24)​

Impact: An attacker can craft MQTT messages with relative path traversal sequences, allowing them to read sensitive files such as configuration files and JWT signing secrets.
CVEs & Scores:

• CVE-2024-6786: CVSS v3.1 score of 6.5, CVSS v4 score of 6.0

3. Time-of-Check Time-of-Use (TOCTOU) Race Condition (CWE-367)​

Impact: This race condition vulnerability allows an attacker to write arbitrary files, potentially leading to malicious code execution and file loss.
CVEs & Scores:

• CVE-2024-6787: CVSS v3.1 score of 5.3, CVSS v4 score of 6.0

Background​

The following Moxa products are deployed across critical infrastructure sectors such as manufacturing, energy, and transportation systems worldwide. The company's headquarters are in Taiwan.

Researcher​

These vulnerabilities were reported to CISA by Noam Moshe of Claroty Research - Team82.

Mitigations​

Moxa recommends several measures to mitigate these vulnerabilities:

1. Software Updates:
   • MXview One Series: Upgrade to version 1.4.1
   • MXview One Central Manager Series: Upgrade to version 1.0.3
2. Network Exposure:
   • Minimize network exposure to ensure the device is not directly accessible from the Internet.
   • Immediately change default credentials upon initial setup to secure the device from unauthorized access.

CISA Recommendations​

CISA provides additional recommendations to safeguard against these vulnerabilities:

• Isolation: Place control system networks and remote devices behind firewalls and segregate them from business networks.
• Secure Access: Utilize Virtual Private Networks (VPNs) for remote access, while keeping in mind the potential vulnerabilities in VPNs and ensuring they are updated to the latest versions.
• Defensive Measures: Perform thorough risk assessments and impact analyses before deploying any measures. Resources on control systems security practices can be found on CISA's ICS webpage.
• Cybersecurity Best Practices: Implement recommended practices to proactively defend ICS assets. Additional guidance can be found in CISA documents such as Improving Industrial Control Systems Cybersecurity with Defense-in-Depth Strategies.

Organizations are also encouraged to report any suspected malicious activity to CISA following their established internal procedures.

Update History​

This advisory was initially published on September 24, 2024.
By staying informed and proactive, we can help ensure the security of critical infrastructure systems. For detailed insights and updates, you can always check the official CISA advisory page.
Stay secure, and keep your systems up-to-date!

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Source: CISA Moxa MXview One