CVE-2024-44555 in AX1806
Summary
by MITRE • 08/26/2024
Tenda AX1806 v1.0.0.1 contains a stack overflow via the iptv.city.vlan parameter in the function setIptvInfo.
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Analysis
by VulDB Data Team • 08/28/2024
The vulnerability identified as CVE-2024-44555 affects the Tenda AX1806 router firmware version 1.0.0.1 and represents a critical stack overflow condition that arises from improper input validation within the setIptvInfo function. This issue manifests when processing the iptv.city.vlan parameter, which is utilized for configuring internet protocol television services on the device. The flaw stems from the device's failure to properly sanitize or limit the length of user-supplied data before processing it within a stack-based buffer, creating an exploitable condition that could allow remote code execution or system compromise.
The technical implementation of this vulnerability resides in the setIptvInfo function where the iptv.city.vlan parameter is directly handled without adequate bounds checking or input validation mechanisms. When an attacker submits a malformed or excessively long value for this parameter through the device's web interface or API endpoints, the system fails to validate the input length before copying it into a fixed-size stack buffer. This classic buffer overflow condition allows an attacker to overwrite adjacent stack memory locations, potentially corrupting program execution flow and enabling arbitrary code execution. The vulnerability is classified under CWE-121 Stack-based Buffer Overflow, which is a well-documented weakness in software development practices that consistently leads to remote code execution when exploited properly.
The operational impact of this vulnerability extends beyond simple denial of service conditions to encompass full system compromise capabilities. An attacker who successfully exploits this stack overflow could potentially execute malicious code with the privileges of the affected service, gain unauthorized access to the device's administrative interface, or even escalate privileges to root access depending on the specific implementation details and system configuration. The attack surface is particularly concerning given that the vulnerability affects a consumer-grade router that typically operates in unsecured network environments and may be accessible from external networks. This could enable attackers to establish persistent backdoors, redirect traffic, or use the compromised device as a launch point for further attacks within the network.
Mitigation strategies for CVE-2024-44555 should prioritize immediate firmware updates from Tenda to address the root cause of the buffer overflow vulnerability. Network administrators should also implement network segmentation and access controls to limit exposure of affected devices to untrusted networks. The implementation of input validation measures at the application level, including proper bounds checking and length validation for all user-supplied parameters, would prevent exploitation of similar vulnerabilities. Additionally, monitoring network traffic for unusual patterns or malformed requests targeting the affected parameter could help detect exploitation attempts. Organizations should consider implementing the principle of least privilege by restricting access to router management interfaces and regularly auditing device configurations to ensure proper security hardening. The vulnerability also highlights the importance of secure coding practices and adherence to security standards such as those outlined in the OWASP Top 10 and NIST Cybersecurity Framework to prevent similar issues in future development cycles.