CVE-2024-30620 in AX1803
Summary
by MITRE • 04/02/2024
Tenda AX1803 v1.0.0.1 contains a stack overflow via the serviceName parameter in the function fromAdvSetMacMtuWan.
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Analysis
by VulDB Data Team • 03/12/2025
The vulnerability identified as CVE-2024-30620 affects the Tenda AX1803 router firmware version 1.0.0.1 and represents a critical stack overflow condition that arises from improper input validation within the device's web interface. This issue occurs specifically within the function named fromAdvSetMacMtuWan which processes the serviceName parameter, creating a potential pathway for remote code execution and system compromise. The stack overflow vulnerability stems from the device's failure to properly sanitize or limit the length of user-supplied input, allowing an attacker to manipulate the program's execution flow through carefully crafted malicious input.
The technical flaw manifests when the router processes HTTP requests containing the serviceName parameter in the context of advanced network settings configuration. This parameter is typically used to set service names for network interfaces but becomes vulnerable when input exceeds predetermined buffer limits. The function fromAdvSetMacMtuWan lacks proper bounds checking mechanisms, enabling attackers to overflow the allocated stack space and potentially overwrite adjacent memory locations including return addresses and control registers. This vulnerability directly maps to CWE-121 Stack-based Buffer Overflow, which is classified under the Common Weakness Enumeration catalog as a fundamental flaw in memory management where data written to a buffer extends beyond its allocated boundaries. The attack vector is particularly concerning as it can be exploited remotely through the web management interface, requiring no physical access or authentication credentials to initiate the exploitation process.
The operational impact of this vulnerability extends beyond simple denial of service conditions to encompass full system compromise and potential unauthorized access to the network infrastructure. An attacker exploiting this vulnerability could gain root-level access to the router's operating system, enabling them to modify network configurations, redirect traffic, install persistent backdoors, or exfiltrate sensitive network information. The compromised device could then serve as a pivot point for attacking other devices within the local network or be used as a command and control node for larger coordinated attacks. This vulnerability particularly affects enterprise and residential networks where the router serves as a critical gateway, potentially exposing all connected devices to unauthorized access. The attack surface is further expanded by the fact that the vulnerability exists in the web interface, making it accessible to anyone who can reach the device's management IP address and port, typically port 80 or 443 for HTTP/HTTPS traffic.
Mitigation strategies for CVE-2024-30620 should prioritize immediate firmware updates from Tenda's official support channels, as the vendor has likely released patches addressing the specific buffer overflow condition. Network administrators should implement network segmentation and access control measures to limit exposure of affected devices to untrusted networks, particularly ensuring that the router's web management interface is not directly accessible from the internet. Additional protective measures include disabling unnecessary services, implementing strong authentication mechanisms, and monitoring network traffic for suspicious patterns that might indicate exploitation attempts. The vulnerability aligns with ATT&CK technique T1210 Compromise Software Supply Chain, as it represents an unpatched software vulnerability that could be exploited by threat actors for lateral movement and privilege escalation. Organizations should also consider deploying intrusion detection systems to monitor for exploitation attempts targeting this specific vulnerability and maintain comprehensive network monitoring to detect any unauthorized access or configuration changes that may result from successful exploitation.