CVE-2023-37714 in F1202
Summary
by MITRE • 07/14/2023
Tenda F1202 V1.0BR_V1.2.0.20(408), FH1202_V1.2.0.19_EN were discovered to contain a stack overflow in the page parameter in the function fromRouteStatic.
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Analysis
by VulDB Data Team • 01/18/2026
The vulnerability identified as CVE-2023-37714 affects Tenda wireless routers including models F1202 and FH1202 with specific firmware versions. This issue resides within the web interface handling mechanism where the device fails to properly validate input parameters before processing them in memory operations. The flaw manifests specifically in the fromRouteStatic function where the page parameter is manipulated without adequate bounds checking, creating a potential entry point for malicious actors to exploit memory corruption vulnerabilities. The affected firmware versions represent widely deployed consumer and small office networking equipment that serves as critical infrastructure components in numerous network environments. This vulnerability represents a significant security risk as it could allow remote code execution or system compromise when exploited by attackers with network access to the affected devices.
The technical implementation of this stack overflow vulnerability stems from improper input validation within the router's web management interface. When a user submits a request containing a maliciously crafted page parameter to the fromRouteStatic function, the system fails to verify the length or content of the input before copying it into a fixed-size buffer on the stack. This classic buffer overflow condition occurs because the device does not implement proper bounds checking or input sanitization before processing user-supplied data. The vulnerability follows CWE-121 CWE Top 25 weakness classification, specifically addressing stack-based buffer overflow conditions that occur when data is copied into a buffer without sufficient size validation. Attackers can leverage this flaw by sending specially crafted HTTP requests that exceed the allocated buffer space, causing the stack to overflow and potentially allowing arbitrary code execution with the privileges of the web server process.
The operational impact of this vulnerability extends beyond simple network disruption to encompass potential full system compromise and unauthorized access to sensitive network data. Remote exploitation of this vulnerability could enable attackers to gain unauthorized administrative access to the router, allowing them to modify network configurations, redirect traffic, or establish persistent backdoors within the network infrastructure. The implications are particularly severe given that these devices typically serve as the primary gateway between internal networks and external internet connections, making them attractive targets for cybercriminals seeking to establish footholds within larger network environments. The vulnerability could also facilitate advanced persistent threat campaigns where attackers use the compromised router as a pivot point for lateral movement throughout the network. From an ATT&CK framework perspective, this vulnerability maps to techniques such as T1071.004 Application Layer Protocol and T1068 Exploitation for Privilege Escalation, as it enables remote code execution and administrative access to network infrastructure.
Mitigation strategies for CVE-2023-37714 should prioritize immediate firmware updates from Tenda as the primary defense mechanism, as the vendor has likely released patches addressing this specific vulnerability. Network administrators should implement network segmentation and access controls to limit exposure of these devices to untrusted networks, while also monitoring for suspicious network traffic patterns that might indicate exploitation attempts. Additional protective measures include disabling unnecessary web management interfaces when not actively required, implementing strong authentication mechanisms, and conducting regular vulnerability assessments of network infrastructure to identify similar issues. Organizations should also consider deploying intrusion detection systems that can identify and alert on suspicious HTTP requests targeting known vulnerable parameters. The vulnerability highlights the importance of secure coding practices and input validation in embedded systems, particularly those handling user-supplied data in network infrastructure devices. Security teams should ensure that all network equipment receives regular security updates and that proper network hygiene practices are maintained to prevent exploitation of similar vulnerabilities in other network components.