CVE-2024-30633 in FH1205
Summary
by MITRE • 03/29/2024
Tenda FH1205 v2.0.0.7(775) has a stack overflow vulnerability in the security parameter from the formWifiBasicSet function.
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Analysis
by VulDB Data Team • 03/14/2025
The vulnerability identified as CVE-2024-30633 affects the Tenda FH1205 wireless router firmware version v2.0.0.7(775) and represents a critical stack overflow flaw within the formWifiBasicSet function. This security weakness resides in the device's web-based management interface where user-provided input is processed without adequate validation or bounds checking. The stack overflow occurs when the router processes security parameters submitted through a web form, allowing an attacker to potentially execute arbitrary code on the affected device. Such vulnerabilities are particularly dangerous in network infrastructure devices as they can provide attackers with persistent access to the underlying network and potentially escalate privileges to gain full administrative control. The flaw stems from improper handling of user-supplied data in the wireless configuration section, where input length validation is insufficient to prevent buffer overflow conditions.
The technical implementation of this vulnerability demonstrates a classic stack-based buffer overflow scenario where the formWifiBasicSet function fails to properly validate the length of incoming security parameter data. When an attacker submits maliciously crafted input exceeding the allocated buffer size, the excess data overflows into adjacent memory locations, potentially corrupting the stack frame and allowing for code execution. This type of vulnerability falls under the Common Weakness Enumeration category CWE-121, which specifically addresses stack-based buffer overflow conditions. The vulnerability is particularly concerning because it occurs in a function responsible for configuring wireless security parameters, meaning that exploitation could allow attackers to modify network security settings, potentially leading to unauthorized network access or man-in-the-middle attacks. The attack surface is further expanded by the fact that this vulnerability is accessible through the web interface, making it exploitable from remote locations without requiring physical access to the device.
The operational impact of CVE-2024-30633 extends beyond simple denial of service conditions, as it presents a significant threat to network security and integrity. An attacker who successfully exploits this vulnerability could gain unauthorized access to the router's administrative interface, potentially allowing them to modify wireless network settings, change passwords, or even install malicious firmware. The router's stack overflow vulnerability could also be leveraged to execute arbitrary commands with the privileges of the web server process, which typically runs with elevated permissions on network devices. This exploitation scenario aligns with the attack technique described in the MITRE ATT&CK framework under T1059.007 for command and script interpreter execution. The vulnerability affects not only the device's local security but also poses risks to the entire network segment it serves, as compromised routers often become stepping stones for lateral movement within corporate networks or home networks where they may serve as central points of connectivity.
Mitigation strategies for this vulnerability should include immediate firmware updates from Tenda to address the buffer overflow condition in the formWifiBasicSet function. Network administrators should also implement network segmentation and access controls to limit the potential impact of exploitation, while monitoring network traffic for suspicious activity related to the affected router model. Additional protective measures include disabling unnecessary web interfaces, implementing strong authentication mechanisms, and regularly auditing network device configurations. The vulnerability highlights the importance of proper input validation and bounds checking in embedded systems, particularly in network infrastructure devices that are often deployed in unattended environments. Security professionals should also consider implementing intrusion detection systems that can identify exploitation attempts targeting known vulnerabilities in network equipment, as the specific nature of this stack overflow makes it potentially detectable through network traffic analysis. Organizations should prioritize patch management for all network devices and establish procedures for regularly reviewing and updating firmware versions to protect against similar vulnerabilities in the future.