Denial-of-Service in Rockwell Automation 5380/5480/5580 Controllers

Executive Summary

CVE-2025-12012 is a denial-of-service vulnerability affecting Rockwell Automation's 5380, 5480, and 5580 controllers. A malicious user could exploit this flaw by writing invalid file data to the controller, causing the device to enter a major non-recoverable fault (MNRF). This fault disrupts the normal operation of the device, rendering it unusable until manually recovered.

The vulnerability is rated with a CVSS v4.0 BaseScore of 9.2, indicating a high severity level. The vector (AV:N/AC:L/AT:N/PR:N/UI:N/VA:H) suggests it can be exploited remotely without requiring privileges or user interaction, leading to high availability impact.

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Detection Guidance

Detection of CVE-2025-12012 on your network or system involves identifying affected Rockwell Automation controllers (5380, 5480, or 5580 models) and checking for signs of exploitation or misconfiguration.

• Inventory your network for Rockwell Automation 5380, 5480, or 5580 controllers. These devices are the only ones affected by this vulnerability.
• Monitor controller logs for unexpected major non-recoverable faults (MNRF). These faults may indicate exploitation attempts or corruption caused by invalid file data.
• Use Rockwell Automation's diagnostic tools or firmware management utilities to verify the current firmware version of the controllers. Compare it against the latest secure versions to determine if the device is vulnerable.
• Inspect network traffic to and from the controllers for unusual file transfer activity, particularly if invalid or malformed project files are being uploaded.

No specific commands are provided in the context for detecting this vulnerability. However, you may use standard network scanning tools (e.g., Nmap) to identify Rockwell Automation devices on your network. Example command to scan for open ports commonly used by these controllers:

• nmap -p 44818,2222 --open <network_range> (replace <network_range> with your target subnet).

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Impact Analysis

If you are using Rockwell Automation 5380, 5480, or 5580 controllers, this vulnerability could have the following impacts:

• Operational disruption: A successful exploit could cause the controller to enter a major non-recoverable fault (MNRF), halting industrial processes or automation tasks that rely on the affected device.
• Downtime and recovery costs: The device may require manual intervention to restore functionality, leading to extended downtime and potential financial losses.
• Security risks: While the primary impact is denial-of-service, the vulnerability could be leveraged as part of a broader attack chain to disrupt critical infrastructure.
• No data breach risk: The vulnerability does not appear to allow unauthorized access to sensitive data or system control, but it can severely impact system availability.

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Compliance Impact

The impact of this vulnerability on compliance with standards and regulations depends on the context in which the affected controllers are used:

• GDPR: If the controllers are part of a system processing personal data of EU citizens, a denial-of-service attack could disrupt data availability, potentially violating GDPR's requirements for data availability and resilience (Article 32). However, since the vulnerability does not directly expose personal data, the risk of a GDPR breach is indirect.
• HIPAA: For organizations in the healthcare sector, if the controllers are used in systems handling protected health information (PHI), the disruption caused by this vulnerability could violate HIPAA's Security Rule, which mandates the availability and integrity of PHI. However, like GDPR, the risk is primarily related to system availability rather than data exposure.
• Industrial standards (e.g., IEC 62443, NIST CSF): The vulnerability could violate requirements for system availability and resilience in industrial control systems. Standards like IEC 62443 emphasize the need for protecting against denial-of-service attacks to ensure continuous operation of critical infrastructure.

While the vulnerability does not directly lead to non-compliance, failure to mitigate it could result in operational disruptions that may violate regulatory or industry-specific requirements for system availability and security.

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Mitigation Strategies

To mitigate CVE-2025-12012, follow these immediate steps:

• Upgrade the firmware of affected Rockwell Automation 5380, 5480, or 5580 controllers to the latest secure version. The context does not specify the exact patched version for this CVE, but refer to Rockwell Automation's official security advisory for guidance.
• Restrict network access to the controllers. Use firewalls or network segmentation to limit exposure to only trusted IP addresses or subnets.
• Disable unnecessary services or ports on the controllers to reduce the attack surface.
• Monitor the controllers for signs of exploitation, such as unexpected reboots or major non-recoverable faults (MNRF).
• Review and validate all project files before uploading them to the controllers to ensure they are not malformed or malicious.

Since no workaround is mentioned in the provided context, upgrading the firmware is the primary recommended action. Refer to Rockwell Automation's official resources for detailed instructions.

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