CVE-2023-52028 in A3700R
Summary
by MITRE • 01/11/2024
TOTOlink A3700R v9.1.2u.5822_B20200513 was discovered to contain a remote command execution (RCE) vulnerability via the setTracerouteCfg function.
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Analysis
by VulDB Data Team • 06/21/2025
The vulnerability identified as CVE-2023-52028 represents a critical remote command execution flaw within the TOTOlink A3700R router firmware version v9.1.2u.5822_B20200513. This issue stems from improper input validation within the setTracerouteCfg function, which processes network traceroute configuration parameters. The flaw allows remote attackers to execute arbitrary commands on the affected device without authentication, potentially enabling full system compromise and unauthorized access to network resources.
The technical implementation of this vulnerability occurs through the setTracerouteCfg function which fails to properly sanitize user-supplied input parameters. When an attacker sends specially crafted requests to the router's web interface or API endpoints, the system processes these inputs directly without adequate validation or filtering mechanisms. This lack of input sanitization creates a path for command injection attacks where malicious payloads can be executed with the privileges of the web server process, typically running with elevated system permissions.
From an operational perspective, this vulnerability presents severe implications for network security and device integrity. An attacker can leverage this RCE capability to gain complete control over the affected router, potentially leading to man-in-the-middle attacks, DNS hijacking, traffic interception, or use of the device as a pivot point for further network exploration. The vulnerability affects not only the local network but also exposes users to potential data breaches, as the compromised device can serve as a gateway for lateral movement within corporate or residential networks.
The vulnerability aligns with CWE-77 and CWE-94 categories, specifically addressing command injection flaws and improper input validation respectively. According to MITRE ATT&CK framework, this vulnerability maps to T1059.007 (Command and Scripting Interpreter: PowerShell) and T1021.001 (Remote Services: Remote Desktop Protocol) as attackers can execute system commands and potentially establish persistent access. Organizations should prioritize immediate remediation through firmware updates provided by TOTOlink, implement network segmentation to limit exposure, and deploy intrusion detection systems to monitor for exploitation attempts.
Mitigation strategies should include immediate firmware updates to the latest available versions that address this vulnerability, network monitoring for suspicious traffic patterns, and implementation of access controls to limit administrative access to the router's web interface. Security teams should also consider deploying network-based intrusion prevention systems to detect and block exploitation attempts, while conducting thorough network assessments to identify any potential compromise of affected devices. Regular vulnerability scanning and patch management processes should be enhanced to prevent similar issues in other network equipment. The vulnerability demonstrates the critical importance of input validation and proper security testing in network device firmware development, particularly for functions handling network configuration parameters that could be exposed to remote attackers.