CVE-2024-46045 in CH22
Summary
by MITRE • 09/13/2024
Tenda CH22 V1.0.0.6(468) has a stack overflow vulnerability located in the frmL7PlotForm function.
If you want to get best quality of vulnerability data, you may have to visit VulDB.
Analysis
by VulDB Data Team • 07/07/2026
The Tenda CH22 V1.0.0.6(468) router firmware contains a critical stack overflow vulnerability within the frmL7PlotForm function, representing a significant security flaw that could enable remote code execution and system compromise. This vulnerability stems from inadequate input validation mechanisms within the web interface handling routines, specifically when processing user-supplied data through the L7 plotting form functionality. The stack overflow occurs due to insufficient bounds checking on buffer operations, allowing attackers to overwrite adjacent memory locations including return addresses and control registers that govern program execution flow.
The technical implementation of this vulnerability aligns with CWE-121 Stack-based Buffer Overflow, where a fixed-size buffer allocated on the stack receives more data than it can accommodate. The frmL7PlotForm function likely processes form inputs without proper sanitization or length verification, creating an exploitable condition where maliciously crafted input can exceed the designated buffer boundaries. This flaw exists in the context of web application security within embedded networking devices, where the attack surface includes HTTP request handling and form processing routines that are accessible through standard network protocols.
The operational impact of this vulnerability extends beyond simple denial of service conditions to encompass full system compromise capabilities. An attacker capable of exploiting this stack overflow could potentially execute arbitrary code with root privileges, gain persistent access to the device, or even escalate to network-wide compromise scenarios. The vulnerability affects users who have enabled web-based administrative interfaces and are running the specified firmware version, making it particularly concerning for enterprise environments where multiple devices may be exposed to similar risks.
Security practitioners should implement immediate mitigations including firmware updates from Tenda to address this vulnerability through proper bounds checking implementation and input sanitization protocols. Network segmentation and firewall rules can provide temporary protection by restricting access to administrative interfaces from untrusted networks. The remediation approach should align with industry best practices for embedded system security and follow guidelines established in the NIST Cybersecurity Framework, particularly focusing on vulnerability management and secure coding principles that prevent buffer overflow conditions through proper memory allocation and validation techniques.
This vulnerability demonstrates the critical importance of input validation in embedded web interfaces and highlights how seemingly minor implementation flaws can create significant security risks. The attack surface for IoT devices continues to expand as manufacturers integrate more sophisticated web-based management capabilities, making robust security testing and secure coding practices essential throughout the development lifecycle. Organizations should conduct comprehensive vulnerability assessments of their network infrastructure to identify similar issues in other firmware versions and implement continuous monitoring strategies to detect potential exploitation attempts against known vulnerabilities.