CVE-2024-33214 in FH1206
Summary
by MITRE • 04/23/2024
Tenda FH1206 V1.2.0.8(8155)_EN was discovered to contain a stack-based buffer overflow vulnerability via the entrys parameter in ip/goform/RouteStatic.
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Analysis
by VulDB Data Team • 03/18/2025
The vulnerability identified as CVE-2024-33214 affects the Tenda FH1206 router model running firmware version V1.2.0.8(8155)_EN. This issue resides within the web interface management component of the device, specifically in the ip/goform/RouteStatic endpoint which handles static routing configuration parameters. The vulnerability manifests as a stack-based buffer overflow that occurs when processing the entrys parameter, indicating a classic software flaw where insufficient input validation allows malicious data to overwrite adjacent memory locations on the stack. This type of vulnerability falls under CWE-121 which categorizes stack-based buffer overflow conditions, representing a critical security weakness that can lead to arbitrary code execution or system compromise. The affected device operates using a web-based administrative interface that processes user inputs through HTTP form submissions, making it susceptible to remote exploitation by attackers who can craft malicious payloads targeting this specific parameter.
The technical exploitation of this vulnerability occurs when an attacker sends a specially crafted HTTP request containing an oversized entrys parameter to the ip/goform/RouteStatic endpoint. The device's web server fails to properly validate or limit the length of this parameter before processing it, leading to a buffer overflow condition on the stack memory. This overflow can overwrite return addresses, function pointers, or other critical stack data, potentially allowing an attacker to redirect program execution flow. The attack vector is remote and does not require authentication, making it particularly dangerous as it can be exploited by anyone with network access to the device. According to ATT&CK framework, this vulnerability maps to T1210 - Exploitation of Remote Services and T1059 - Command and Scripting Interpreter, as successful exploitation could enable attackers to execute arbitrary commands on the device.
The operational impact of this vulnerability extends beyond simple denial of service scenarios, as it represents a severe threat to network security infrastructure. Compromised routers can serve as entry points for broader network attacks, allowing attackers to establish persistent access, redirect traffic, or use the device as a pivot point for attacking internal network resources. The vulnerability affects the device's core routing functionality, potentially disrupting network connectivity while simultaneously providing a backdoor for malicious actors. Organizations relying on these devices for network infrastructure are at risk of unauthorized access to their network segments, especially in environments where router administration interfaces are exposed to untrusted networks or the internet. The lack of authentication requirements for exploitation means that this vulnerability could be weaponized by automated scanning tools, increasing the attack surface and potential impact across multiple deployments. Security professionals should consider this vulnerability as a high-priority concern for any network containing affected Tenda FH1206 devices, as it represents a critical weakness that could be leveraged for significant network compromise.
Mitigation strategies should focus on immediate firmware updates from Tenda, as the vendor has likely released patches addressing this specific buffer overflow condition. Network segmentation and firewall rules should be implemented to restrict access to router management interfaces, particularly when these interfaces are exposed to untrusted networks. The principle of least privilege should be applied to router management access, ensuring that only authorized personnel can interact with these interfaces. Regular security audits and vulnerability assessments should include verification of device firmware versions and patch status. Network monitoring should be enhanced to detect anomalous traffic patterns that might indicate exploitation attempts. Additionally, implementing network access control lists and disabling unnecessary services on affected devices can reduce the attack surface. Organizations should also consider deploying intrusion detection systems capable of identifying exploitation attempts targeting this specific vulnerability pattern, as the buffer overflow behavior may generate detectable network traffic signatures. The vulnerability highlights the importance of proper input validation and secure coding practices in embedded network devices, particularly those handling user-provided configuration data through web interfaces.