CVE-2024-32285 in W30E
Summary
by MITRE • 04/17/2024
Tenda W30E v1.0 V1.0.1.25(633) firmware has a stack overflow vulnerability via the password parameter in the formaddUserName function.
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Analysis
by VulDB Data Team • 03/17/2025
The Tenda W30E v1.0 V1.0.1.25(633) wireless router firmware contains a critical stack overflow vulnerability that arises from improper input validation within the formaddUserName function. This vulnerability specifically manifests when processing the password parameter, creating a condition where maliciously crafted input can overwrite adjacent stack memory locations. The flaw represents a classic buffer overflow scenario where the firmware fails to adequately check the length of user-supplied data before copying it into fixed-size memory buffers, allowing attackers to potentially execute arbitrary code or cause system instability.
The technical implementation of this vulnerability stems from insufficient bounds checking in the formaddUserName function which handles user authentication parameters. When a user submits a password through the web interface or API endpoints, the firmware does not validate the input length against the allocated buffer size, enabling attackers to overflow the stack and overwrite return addresses, function pointers, or other critical memory structures. This type of vulnerability falls under CWE-121 Stack-based Buffer Overflow, which is classified as a high-severity issue in the Common Weakness Enumeration catalog. The attack surface is particularly concerning as it occurs during routine user authentication processes, making exploitation relatively straightforward for attackers who can manipulate web forms or API calls.
The operational impact of this vulnerability extends beyond simple denial of service conditions, as it creates potential for complete system compromise. An attacker who successfully exploits this stack overflow could gain unauthorized access to the router's administrative interface, potentially leading to full system control including configuration changes, network monitoring, or even persistent backdoor installation. The vulnerability affects all devices running the specified firmware versions, making it a widespread concern for network administrators who may have multiple affected devices in their infrastructure. According to ATT&CK framework category T1210 Exploitation of Remote Services, this vulnerability represents a direct path to system compromise through web application exploitation techniques, particularly targeting the router's web management interface.
Mitigation strategies should focus on immediate firmware updates from Tenda to address the root cause of the buffer overflow. Network administrators should also implement network segmentation to limit access to affected devices, disable unnecessary web management interfaces, and monitor for suspicious login attempts or network traffic patterns that might indicate exploitation attempts. Additional protective measures include implementing intrusion detection systems to monitor for exploitation signatures, enforcing strong authentication practices, and conducting regular vulnerability assessments of networked devices. Organizations should also consider network access controls to restrict direct access to router management interfaces from external networks, as the vulnerability is particularly dangerous when exposed to untrusted networks. The remediation process requires careful attention to ensure that firmware updates are properly applied without causing device downtime, and that proper backup procedures are in place to restore functionality if update failures occur.