Privilege Escalation via Cookie Manipulation in Weintek cMT3092X HMI

Executive Summary

This vulnerability in Weintek cMT3092X HMI allows a non-privileged user to modify cookies to gain elevated privileges. This means an attacker without admin rights could manipulate session cookies to access sensitive functions or data.

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Detection Guidance

Detecting this vulnerability requires checking for improper cookie handling in Weintek cMT3092X HMI devices. Monitor network traffic for unauthorized privilege escalation attempts or unusual cookie modifications. Inspect HTTP requests and responses for cookies that grant elevated access without proper authentication. Use tools like Wireshark to capture and analyze traffic to the HMI device.

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Impact Analysis

An attacker could exploit this to gain unauthorized access to the HMI system, potentially altering settings, stealing data, or disrupting operations. This could lead to system compromise or operational failures.

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Compliance Impact

This vulnerability could lead to unauthorized access to sensitive data, violating confidentiality requirements in GDPR and HIPAA. Non-compliance may result in legal penalties, data breach notifications, and reputational damage.

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Mitigation Strategies

Immediately update the Weintek cMT3092X HMI firmware to the latest patched version. Restrict network access to the HMI device using firewalls or VLAN segmentation. Implement strict cookie validation and session management policies. Disable non-essential services and ports on the device. Monitor logs for suspicious activity and unauthorized access attempts.

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