CVE-2024-32287 in W30E
Summary
by MITRE • 04/17/2024
Tenda W30E v1.0 V1.0.1.25(633) firmware has a stack overflow vulnerability via the qos parameter in the fromqossetting function.
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Analysis
by VulDB Data Team • 03/17/2025
The Tenda W30E v1.0 V1.0.1.25(633) wireless router firmware contains a critical stack overflow vulnerability that stems from improper input validation within the fromqossetting function. This vulnerability specifically manifests when processing the qos parameter, creating a condition where maliciously crafted input can overwrite adjacent memory locations on the stack. The flaw represents a classic buffer overflow scenario where the firmware fails to properly bounds-check user-supplied data before copying it into fixed-size memory buffers. Such vulnerabilities are particularly dangerous in network infrastructure devices as they can be exploited remotely without authentication, making them attractive targets for attackers seeking persistent access to network environments. The stack overflow occurs during the Quality of Service parameter processing, which is a core networking function responsible for traffic management and prioritization within the router's network stack.
The technical implementation of this vulnerability places the device at significant risk due to the nature of the affected function and its operational context. When the fromqossetting function receives the qos parameter, it appears to use a vulnerable memory copy operation that does not validate the input length against the allocated buffer size. This allows an attacker to supply input data exceeding the buffer capacity, causing a stack-based buffer overflow that can overwrite return addresses, saved registers, and other critical stack data. The impact extends beyond simple denial of service as this vulnerability can potentially be leveraged for remote code execution, enabling attackers to gain unauthorized control over the device. The vulnerability aligns with CWE-121 Stack-based Buffer Overflow, which specifically addresses buffer overflows occurring in stack memory regions. From an attack perspective, this represents a high-value target within the MITRE ATT&CK framework under the T1210 Exploitation of Remote Services category, as it allows for privilege escalation and persistent access to network infrastructure.
The operational impact of this vulnerability affects network administrators and end users who rely on Tenda W30E devices for their networking infrastructure. Once exploited, the vulnerability could enable attackers to gain complete control over the router, potentially leading to man-in-the-middle attacks, DNS hijacking, traffic interception, and unauthorized network access. The device's role as a central networking component makes it an ideal target for attackers seeking to establish persistent footholds within network environments, particularly in scenarios where the router serves as a gateway to internal networks. Network segmentation benefits could be completely undermined if an attacker successfully exploits this vulnerability, as they would gain access to the entire network infrastructure managed by the compromised device. The vulnerability's exploitation potential also extends to creating backdoors, modifying network configurations, and potentially using the device as a pivot point for attacking other systems within the network. Organizations using this firmware version face significant risk of unauthorized access, data breaches, and network disruption that could affect business continuity and regulatory compliance requirements.
Mitigation strategies for this vulnerability require immediate action from device administrators to address the root cause and prevent exploitation attempts. The primary recommendation involves applying firmware updates from Tenda that contain patches addressing the stack overflow condition in the fromqossetting function. Until updates are available, network administrators should implement network segmentation techniques to isolate affected devices from critical network segments, disable unnecessary services, and monitor network traffic for suspicious activity that might indicate exploitation attempts. The implementation of intrusion detection systems and network monitoring tools can help identify potential exploitation attempts targeting this specific vulnerability. Additionally, organizations should consider implementing access controls to limit who can interact with the router's administrative interfaces, particularly focusing on restricting access to the qos configuration parameters. Security configurations should include disabling unused network services and ensuring that only authorized personnel have access to the device's configuration interfaces. The vulnerability highlights the importance of firmware security testing and continuous monitoring of network infrastructure devices, as it represents a failure in the software development lifecycle to properly validate user inputs and implement robust memory management practices.