CVE-2024-8228 in Tenda
Summary
by MITRE • 08/28/2024
A vulnerability was found in Tenda O5 1.0.0.8(5017). It has been classified as critical. This affects the function fromSafeSetMacFilter of the file /goform/setMacFilterList. The manipulation of the argument remark/type/time leads to stack-based buffer overflow. It is possible to initiate the attack remotely. The exploit has been disclosed to the public and may be used. NOTE: The vendor was contacted early about this disclosure but did not respond in any way.
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Analysis
by VulDB Data Team • 08/29/2024
The vulnerability identified as CVE-2024-8228 represents a critical stack-based buffer overflow in the Tenda O5 router firmware version 1.0.0.8(5017) affecting the fromSafeSetMacFilter function within the /goform/setMacFilterList file. This flaw resides in the router's web interface handling mechanism where user-supplied input parameters are processed without adequate bounds checking. The vulnerability specifically targets the remark/type/time arguments which are passed to the vulnerable function, creating an opportunity for attackers to overwrite adjacent stack memory locations. The stack-based nature of this buffer overflow means that the attacker can potentially overwrite return addresses, function pointers, or other critical stack variables to redirect program execution flow.
The technical exploitation of this vulnerability occurs through remote manipulation of the affected web form interface, eliminating the need for physical access or local network presence. Attackers can craft malicious payloads containing oversized input data in the remark/type/time parameters to trigger the buffer overflow condition. This type of vulnerability falls under CWE-121 Stack-based Buffer Overflow, which is classified as a critical weakness in software security. The remote exploitability aspect aligns with ATT&CK technique T1190 for exploitation of remote services, where adversaries leverage vulnerabilities in network services to gain unauthorized access or execute arbitrary code on the target system.
The operational impact of this vulnerability extends beyond simple code execution as it represents a complete compromise of the router's security posture. Successful exploitation could allow attackers to gain root access to the device, enabling them to modify network configurations, intercept traffic, establish persistent backdoors, or use the compromised router as a pivot point for attacking other devices on the local network. The lack of vendor response to early disclosure attempts creates a significant security gap where organizations cannot rely on official patches or updates, leaving affected devices vulnerable to active exploitation. The public disclosure of the exploit means that threat actors can readily implement this attack vector without requiring advanced technical skills or research time, making the vulnerability particularly dangerous in enterprise and home network environments.
Organizations should immediately implement network segmentation strategies to isolate affected devices from critical systems and consider disabling unnecessary web management interfaces until patches are available. Network monitoring should be enhanced to detect anomalous traffic patterns that might indicate exploitation attempts, particularly around the /goform/setMacFilterList endpoint. The absence of vendor response necessitates proactive security measures including firmware analysis to identify potential workarounds or manual patching approaches. Security teams should also consider implementing intrusion detection systems that can identify and block known exploit patterns targeting this specific vulnerability. Additionally, network administrators should review and restrict access to router management interfaces to only trusted IP addresses and consider implementing multi-factor authentication mechanisms where possible. The vulnerability demonstrates the critical importance of timely vendor communication and response in maintaining network security postures, as the lack of official remediation creates a window of opportunity for malicious actors to exploit the device without detection.