CVE-2024-52274 in AC6V2
Summary
by MITRE • 12/04/2024
Stack-based Buffer Overflow vulnerability in Shenzhen Tenda Technology Co Tenda AC6V2 (setDoubleL2tpConfig->guest_ip_check(overflow arg: mask) modules) allows Overflow Buffers.This issue affects Tenda AC6V2: through 15.03.06.50
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Analysis
by VulDB Data Team • 05/29/2025
The vulnerability identified as CVE-2024-52274 represents a critical stack-based buffer overflow flaw within the Tenda AC6V2 wireless router firmware, specifically within the setDoubleL2tpConfig function where the guest_ip_check module processes an overflow argument named mask. This vulnerability resides in the network configuration handling subsystem of the device, making it particularly dangerous as it can be exploited through remote network access. The issue affects firmware versions up to and including 15.03.06.50, indicating a widespread exposure across multiple deployments of this particular router model. The buffer overflow occurs when the system processes user-supplied input through the mask parameter, which is processed by the guest_ip_check function, creating an opportunity for malicious actors to overwrite adjacent memory locations on the stack.
The technical exploitation of this vulnerability follows the classic stack buffer overflow pattern where insufficient bounds checking allows an attacker to write beyond the allocated buffer space, potentially overwriting return addresses, function pointers, or other critical stack data. The CWE-121 classification applies directly to this scenario, as it involves a stack-based buffer overflow where the buffer is allocated on the stack and the overflow occurs due to inadequate input validation. This flaw creates a potential privilege escalation path since the router's configuration functions typically operate with elevated privileges, and successful exploitation could allow an attacker to execute arbitrary code with administrative access to the device. The ATT&CK framework's T1059.007 technique of command and script injection could be leveraged if the overflow results in code execution, while T1566.001 social engineering could be employed to deliver malicious payloads to vulnerable devices.
The operational impact of this vulnerability extends beyond simple device compromise, as it represents a significant threat to network security infrastructure. Compromised routers can serve as entry points for broader network infiltration, allowing attackers to establish persistent access, conduct man-in-the-middle attacks, or redirect traffic through malicious servers. The Tenda AC6V2 device serves as a critical network gateway for many residential and small office environments, making this vulnerability particularly dangerous when considering the potential for large-scale exploitation. The impact is amplified by the fact that this is a remote code execution vulnerability that does not require authentication, meaning any attacker with network access can potentially exploit the flaw. Network administrators face the challenge of identifying vulnerable devices across their infrastructure, as the default configuration and lack of authentication requirements make exploitation straightforward.
Mitigation strategies for CVE-2024-52274 should prioritize immediate firmware updates from Tenda, as this represents the most direct and effective solution to address the underlying buffer overflow vulnerability. Organizations should implement network segmentation to limit exposure of these devices to untrusted networks, while also deploying network monitoring solutions to detect anomalous traffic patterns that might indicate exploitation attempts. The principle of least privilege should be applied to router configurations, ensuring that only necessary services are enabled and that administrative access is restricted to trusted networks. Additionally, network administrators should consider implementing intrusion detection systems that can identify known exploit patterns for this specific vulnerability. Regular vulnerability assessments and penetration testing should be conducted to identify other potential weaknesses in the network infrastructure, while device inventory management processes should be enhanced to track firmware versions and ensure timely patch deployment across all affected devices. The vulnerability highlights the importance of secure coding practices and input validation, particularly for embedded systems where resource constraints often lead to insufficient security measures.