CVE-2024-30626 in FH1205
Summary
by MITRE • 03/29/2024
Tenda FH1205 v2.0.0.7(775) has a stack overflow vulnerability in the schedEndTime parameter from setSchedWifi function.
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Analysis
by VulDB Data Team • 08/28/2024
The vulnerability identified as CVE-2024-30626 affects the Tenda FH1205 v2.0.0.7(775) router firmware, representing a critical stack overflow condition within the setSchedWifi function. This flaw manifests specifically when processing the schedEndTime parameter, creating a potential pathway for remote code execution and system compromise. The vulnerability resides in the firmware's handling of user-supplied input through web interface parameters, where insufficient bounds checking allows maliciously crafted data to overflow stack memory allocated for the schedEndTime variable. Such stack buffer overflows are classified under CWE-121 as stack-based buffer overflow conditions, where data written beyond the allocated buffer space can overwrite adjacent memory locations including return addresses and function parameters.
The operational impact of this vulnerability extends beyond simple denial of service scenarios, as it enables attackers to execute arbitrary code on the affected device with the privileges of the web server process. This represents a significant security risk for network infrastructure, as compromised routers can serve as entry points for broader network infiltration, traffic interception, or as command and control nodes in botnet operations. The vulnerability's exploitability is enhanced by the fact that it operates through the standard web administration interface, requiring no specialized tools or physical access to the device. Attackers can leverage this weakness to gain persistent access to the network, potentially leading to data exfiltration, service disruption, or lateral movement within the compromised network environment.
Security professionals should recognize this vulnerability as a prime example of insufficient input validation in web applications, aligning with ATT&CK technique T1210 for exploitation of remote services and T1068 for local privilege escalation. The affected Tenda FH1205 device represents a common target for automated scanning campaigns, as the vulnerability affects a widely deployed consumer-grade networking device. Mitigation strategies should include immediate firmware updates from Tenda, network segmentation to limit access to administrative interfaces, and implementation of intrusion detection systems to monitor for exploitation attempts. Additionally, administrators should consider disabling unnecessary web management interfaces, implementing strong authentication mechanisms, and conducting regular vulnerability assessments to identify similar flaws in other network devices. The vulnerability demonstrates the critical importance of proper input validation and memory management in embedded systems, as even seemingly benign configuration parameters can become attack vectors when not properly secured against buffer overflow conditions.