CVE-2023-48192 in A3700R
Summary
by MITRE • 11/21/2023
An issue in TOTOlink A3700R v.9.1.2u.6134_B20201202 allows a local attacker to execute arbitrary code via the setTracerouteCfg function.
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Analysis
by VulDB Data Team • 07/10/2026
The vulnerability identified as CVE-2023-48192 affects the TOTOlink A3700R router firmware version 9.1.2u.6134_B20201202, representing a critical security flaw that enables local privilege escalation through improper input validation within the setTracerouteCfg function. This issue resides in the router's web management interface implementation where insufficient sanitization of user-supplied parameters creates a pathway for arbitrary code execution. The vulnerability is particularly concerning because it requires no network access to exploit, as the attacker must only have local administrative access or physical presence to interact with the device's interface. This aligns with CWE-79 and CWE-119 categories, which address improper input validation and buffer overflow conditions respectively, where the flaw manifests as a classic command injection vulnerability through the traceroute configuration interface.
The technical implementation of this vulnerability stems from the router's failure to properly validate and sanitize inputs passed to the setTracerouteCfg function, which handles configuration parameters for network tracing operations. When legitimate users interact with the web interface to configure traceroute settings, the system accepts user input without adequate filtering or escaping mechanisms. This allows an attacker to inject malicious commands that get executed within the router's execution context, potentially enabling full system compromise. The flaw demonstrates characteristics consistent with the ATT&CK technique T1059.007 for command and scripting interpreter, where adversaries leverage legitimate system utilities to execute malicious code. The vulnerability also represents a privilege escalation vector as it allows local users to execute code with elevated privileges, potentially bypassing normal access controls and system protections.
The operational impact of CVE-2023-48192 extends beyond simple code execution, as it provides attackers with complete control over the affected router's functionality. This includes the ability to modify network configurations, access sensitive data, redirect traffic, or establish persistent backdoors within the network infrastructure. The vulnerability's local nature means that any individual with physical access to the device or administrative credentials can exploit it, making it particularly dangerous in environments where such access is not strictly controlled. Organizations relying on TOTOlink A3700R routers for network security are at risk of internal threats or supply chain attacks where malicious actors gain access through compromised administrative accounts or physical access to network equipment. The implications are especially severe in enterprise environments where routers serve as critical network infrastructure components and where unauthorized access could lead to complete network compromise.
Mitigation strategies for this vulnerability require immediate firmware updates from TOTOlink to address the input validation flaws in the setTracerouteCfg function. System administrators should implement network segmentation to limit physical access to network equipment and establish strict access controls for administrative interfaces. The vulnerability highlights the importance of secure coding practices and input validation as outlined in the OWASP Top Ten and NIST cybersecurity guidelines. Organizations should also consider implementing network monitoring solutions to detect anomalous traceroute configuration changes and unauthorized administrative access attempts. Additionally, regular security assessments of network infrastructure devices should be conducted to identify similar vulnerabilities in other router models or firmware versions. The ATT&CK framework suggests implementing defensive measures such as process monitoring and input validation controls to prevent exploitation of similar command injection vulnerabilities. Physical security controls including restricted access to network equipment rooms and proper credential management procedures should be enforced to minimize the risk of local exploitation.