CVE-2024-52273 in AC6V2
Summary
by MITRE • 12/04/2024
Stack-based Buffer Overflow vulnerability in Shenzhen Tenda Technology Co Tenda AC6V2 (setDoublePppoeConfig->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 CVE-2024-52273 vulnerability represents a critical stack-based buffer overflow flaw discovered in the Tenda AC6V2 wireless router firmware version 15.03.06.50 and earlier. This vulnerability resides within the setDoublePppoeConfig function, specifically within the guest_ip_check module where an overflow occurs in the mask argument parameter. The flaw demonstrates characteristics consistent with CWE-121 Stack-based Buffer Overflow, where insufficient bounds checking allows an attacker to write beyond the allocated buffer space on the stack. The affected device is a consumer-grade wireless router manufactured by Shenzhen Tenda Technology Co, making this vulnerability particularly concerning due to the widespread deployment of such networking equipment in both residential and small office environments. The buffer overflow occurs during the processing of PPPoE configuration parameters, specifically when handling guest network IP settings, which suggests the vulnerability could be exploited through network-based attacks targeting the router's web interface or API endpoints.
The technical exploitation of this vulnerability requires careful crafting of input data that exceeds the allocated buffer size for the mask parameter within the guest_ip_check function. When the vulnerable firmware processes malformed input data, it fails to validate the length of the provided mask argument, allowing attackers to overwrite adjacent stack memory locations. This overflow can potentially corrupt return addresses, function pointers, or other critical stack data structures, enabling arbitrary code execution or denial of service conditions. The attack surface is particularly significant since the affected device operates as a network gateway, often accessible from both local and remote networks, and the vulnerability could be triggered through multiple attack vectors including web interface submissions, API calls, or even direct network protocol manipulation. This aligns with ATT&CK technique T1210 - Exploitation of Remote Services, where adversaries leverage unpatched network services to gain system access.
The operational impact of this vulnerability extends beyond simple privilege escalation or code execution, as it fundamentally compromises the security posture of networks relying on Tenda AC6V2 routers. Successful exploitation could enable attackers to gain full administrative control over the device, potentially allowing them to modify network configurations, redirect traffic, establish persistent backdoors, or use the compromised router as a launch point for further attacks against internal network segments. The vulnerability affects not only the device's immediate functionality but also represents a potential pathway for lateral movement within corporate or residential networks where such routers are commonly deployed. Organizations using affected firmware versions face significant risk of unauthorized network access, data interception, or complete network compromise, particularly in environments where network segmentation is minimal or non-existent. The widespread deployment of Tenda AC6V2 devices in both home and small business environments means that this vulnerability could affect thousands of network endpoints globally.
Mitigation strategies for CVE-2024-52273 should prioritize immediate firmware updates from Tenda Technology Co, as the vendor has likely released patches addressing this specific buffer overflow condition. Network administrators should implement network segmentation to limit access to affected devices and consider disabling unnecessary services or remote management capabilities until patches are applied. The implementation of network monitoring solutions can help detect anomalous traffic patterns or exploitation attempts targeting the vulnerable web interface or API endpoints. Additional defensive measures include configuring firewalls to restrict access to the router's administrative interfaces, implementing strong authentication mechanisms, and conducting regular vulnerability assessments of network infrastructure. Organizations should also consider network access controls that prevent unauthorized devices from connecting to the network, as well as maintaining detailed logs of network activities for incident response purposes. The vulnerability serves as a reminder of the critical importance of firmware security in IoT and networking devices, particularly in light of ATT&CK tactic T1071.004 - Application Layer Protocol: DNS, where attackers may leverage compromised network devices to conduct further reconnaissance or data exfiltration activities.