EUVD-2024-36171

Comprehensive Technical Analysis of EUVD-2024-36171

1. Vulnerability Assessment and Severity Evaluation

The vulnerability EUVD-2024-36171, also known as CVE-2024-36604, pertains to a Blind Command Injection flaw in the Tenda O3V2 v1.0.0.12(3880) firmware. This vulnerability is located in the stpEn parameter of the SetStp function. The severity of this vulnerability is rated at a base score of 9.8 according to CVSS v3.1, indicating a critical risk. The vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H highlights the following characteristics:

• Attack Vector (AV): Network (N) - The vulnerability can be exploited remotely over the network.
• Attack Complexity (AC): Low (L) - The attack does not require special conditions and can be easily executed.
• Privileges Required (PR): None (N) - No privileges are required to exploit the vulnerability.
• User Interaction (UI): None (N) - No user interaction is required for the attack to succeed.
• Scope (S): Unchanged (U) - The vulnerability does not change the security scope.
• Confidentiality (C): High (H) - The vulnerability allows unauthorized access to sensitive information.
• Integrity (I): High (H) - The vulnerability allows unauthorized modification of data.
• Availability (A): High (H) - The vulnerability allows disruption of services.

2. Potential Attack Vectors and Exploitation Methods

The Blind Command Injection vulnerability can be exploited by sending specially crafted requests to the SetStp function with malicious input in the stpEn parameter. Since the vulnerability allows command execution with root privileges, attackers can:

• Execute Arbitrary Commands: Run any command on the affected device.
• Gain Root Access: Obtain the highest level of privileges on the system.
• Install Malware: Deploy malicious software for further exploitation.
• Exfiltrate Data: Steal sensitive information from the device.
• Disrupt Services: Cause denial of service (DoS) by stopping critical processes.

3. Affected Systems and Software Versions

The vulnerability specifically affects Tenda O3V2 devices running firmware version v1.0.0.12(3880). Other versions of the firmware may also be affected, but this has not been confirmed. It is crucial for users and administrators to verify the firmware version of their devices and apply updates as necessary.

4. Recommended Mitigation Strategies

To mitigate the risk associated with this vulnerability, the following steps are recommended:

• Update Firmware: Apply the latest firmware updates provided by Tenda. Ensure that the device is running a version that addresses this vulnerability.
• Network Segmentation: Isolate the affected devices from critical networks to limit the potential impact of an attack.
• Access Control: Implement strict access controls to restrict unauthorized access to the device.
• Monitoring and Logging: Enable comprehensive logging and monitoring to detect any suspicious activities.
• Intrusion Detection Systems (IDS): Deploy IDS to identify and respond to potential exploitation attempts.

5. Impact on European Cybersecurity Landscape

The presence of this vulnerability in widely used networking devices like Tenda O3V2 poses a significant risk to the European cybersecurity landscape. Given the critical nature of the vulnerability, it can be exploited to compromise network security, leading to data breaches, service disruptions, and potential financial losses. Organizations and individuals must prioritize patching and securing their devices to mitigate these risks.

6. Technical Details for Security Professionals

For security professionals, the following technical details are essential:

• Vulnerability Type: Blind Command Injection
• Affected Parameter: stpEn in the SetStp function
• Privilege Level: Root
• Exploitation Method: Crafted network requests to the SetStp function
• Detection: Monitor network traffic for unusual patterns and commands being executed on the device.
• Mitigation: Implement network-level protections and ensure devices are updated to the latest firmware.

Conclusion

The vulnerability EUVD-2024-36171 in Tenda O3V2 v1.0.0.12(3880) represents a critical risk due to its potential for remote command execution with root privileges. Organizations must take immediate action to update their devices and implement robust security measures to protect against potential exploitation. Continuous monitoring and vigilance are essential to safeguard against such high-impact vulnerabilities.

References

For further details, refer to the official advisory: Blind Command Injection in STP Service on Tenda O3V2