CVE-2024-30631 in FH1205
Summary
by MITRE • 03/29/2024
Tenda FH1205 v2.0.0.7(775) has a stack overflow vulnerability in the schedStartTime parameter from setSchedWifi function.
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Analysis
by VulDB Data Team • 03/14/2025
The vulnerability identified as CVE-2024-30631 affects the Tenda FH1205 v2.0.0.7(775) router firmware, presenting a critical stack overflow condition within the setSchedWifi function. This issue arises specifically when processing the schedStartTime parameter, which is utilized for scheduling wireless network operations. The flaw represents a classic buffer overflow vulnerability that can be exploited through improper input validation mechanisms within the firmware's web interface handling code. Such vulnerabilities typically occur when developers fail to adequately check input lengths against allocated buffer sizes, creating opportunities for malicious actors to overwrite adjacent memory locations.
The technical implementation of this vulnerability stems from insufficient bounds checking in the firmware's parameter parsing routine. When the schedStartTime parameter is submitted through the setSchedWifi function, the system does not properly validate the input length before copying it into a fixed-size stack buffer. This allows an attacker to craft a malicious input that exceeds the buffer capacity, causing a stack overflow condition that can lead to arbitrary code execution or system crash. The vulnerability is particularly concerning as it exists within the administrative interface of a network device, potentially enabling remote code execution with elevated privileges. According to CWE-121, this vulnerability maps directly to stack-based buffer overflow conditions that occur when insufficient bounds checking is performed on user-supplied data.
The operational impact of this vulnerability extends beyond simple system instability, as it provides potential attackers with pathways to gain unauthorized access to the network infrastructure. An attacker could exploit this condition to execute arbitrary commands on the affected device, potentially leading to complete system compromise, data exfiltration, or the establishment of persistent backdoors. The vulnerability affects the device's wireless scheduling functionality, which is commonly used for managing network access times, making it a particularly attractive target for attackers seeking to manipulate network availability or establish long-term access. This aligns with ATT&CK technique T1059.007 for Command and Scripting Interpreter, where adversaries may leverage such vulnerabilities to execute malicious commands within the target environment.
Mitigation strategies for CVE-2024-30631 should prioritize immediate firmware updates from Tenda, as the vendor likely has patched this vulnerability in subsequent releases. Network administrators should implement network segmentation and access controls to limit exposure of affected devices to untrusted networks. Additional protective measures include disabling unnecessary web interfaces, implementing strong authentication mechanisms, and monitoring network traffic for suspicious activity patterns that might indicate exploitation attempts. The vulnerability demonstrates the importance of input validation and secure coding practices within embedded systems, particularly those handling user input through web interfaces. Organizations should also consider implementing intrusion detection systems that can identify anomalous behavior patterns associated with buffer overflow exploitation attempts, and establish robust patch management procedures to ensure timely deployment of security updates across all network infrastructure components.