CVE-2023-52030: Critical Remote Code Execution Vulnerability in TOTOlink A3700R

Vulnerability Summary

• CVE ID: CVE-2023-52030​

• Severity: Critical (CVSS 3.1 Score: 9.8)​

• Attack Vector: Network

• Attack Complexity: Low​

• Privileges Required: None​

• User Interaction: None​

• Impact: Remote Code Execution (RCE)​

CVE-2023-52030 is a critical remote code execution vulnerability identified in the TOTOlink A3700R router, specifically in firmware version 9.1.2u.5822_B20200513. The vulnerability resides in the setOpModeCfg function, which improperly handles user input, allowing unauthenticated attackers to execute arbitrary commands on the device. ​

Affected Products

The following product is affected:​

• Product: TOTOlink A3700R​

• Firmware Version: 9.1.2u.5822_B20200513​

Exploitation Details

The vulnerability can be exploited remotely without authentication. An attacker can send a specially crafted HTTP request to the router’s web interface, targeting the setOpModeCfg function. Due to insufficient input validation, the router executes the injected commands with root privileges, potentially compromising the entire device.​

Potential Risks

• Complete takeover of the router​

• Interception or redirection of network traffic​

• Deployment of malicious firmware or persistent backdoors​

• Use of the compromised router as a pivot point for attacks on connected devices​

Mitigation Recommendations

• Firmware Update: Check TOTOlink’s official website or support channels for firmware updates addressing this vulnerability.

• Disable Remote Management: If remote management is not essential, disable it to reduce exposure.​

• Network Segmentation: Place the router behind a firewall or within a segmented network to limit access.​

• Monitor for Suspicious Activity: Regularly review logs and network traffic for signs of unauthorized access or anomalies.​

Conclusion

CVE-2023-52030 poses a significant threat to users of the TOTOlink A3700R router with the specified firmware version. Given the ease of exploitation and the potential impact, it’s imperative to apply the recommended mitigations promptly to secure affected devices.​

References

• CVE Details – CVE-2023-52030​CVE Database

• CVE.org – CVE-2023-52030