Command Injection in Tenda Router Firmware

Executive Summary

This vulnerability is a command injection flaw in multiple router models (TR1200, TR3000, WR300, WR1200, WR1300, WR1500, WR3000, WR3600, WR6500). It exists in the system.upgrade_check interface and allows attackers to execute arbitrary commands with root privileges by sending specially crafted input.

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Detection Guidance

Check if any of the affected devices (TR1200 v2.4.15, TR3000 v2.4.21, WR300 v2.4.25, WR1200 v2.4.23, WR1300 v2.4.22, WR1500 v2.3.10, WR3000 v2.4.19, WR3600 v2.3.16, WR6500 v2.3.15) are present on your network. Inspect the system.upgrade_check interface for unexpected command execution or input handling.

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Impact Analysis

An attacker could exploit this to gain full control over your router, potentially intercepting network traffic, stealing data, installing malware, or using your device in botnets. This could lead to privacy breaches, unauthorized access to your network, or disruption of internet services.

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Compliance Impact

This vulnerability allows attackers to execute arbitrary commands as root via a crafted input, which could lead to unauthorized access, data breaches, or system compromise. Such risks may violate compliance requirements under GDPR, HIPAA, or other standards that mandate strong access controls and protection against unauthorized command execution.

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Mitigation Strategies

Immediately update affected devices to the latest patched versions. If patches are unavailable, restrict network access to the system.upgrade_check interface and monitor for suspicious activity.

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