Overview
In the ever-evolving landscape of cybersecurity, the recent discovery of a critical vulnerability in Tenda AC7 15.03.06.44 has raised significant concerns among security experts. Classified as CVE-2025-8017, this vulnerability pertains to the function formSetMacFilterCfg in the file /goform/setMacFilterCfg of the httpd component. It allows a malicious actor to execute a stack-based buffer overflow by manipulating the argument deviceList. The gravity of the situation is further amplified by the fact that the exploit has been disclosed to the public and can be launched remotely, potentially affecting a large number of systems globally.
The vulnerability matters because it poses a significant threat to data security and system integrity. If exploited successfully, it could lead to potential system compromise and data leakage. This necessitates immediate attention and action from all users of the affected Tenda device.
Vulnerability Summary
CVE ID: CVE-2025-8017
Severity: Critical (CVSS 8.8)
Attack Vector: Network
Privileges Required: None
User Interaction: None
Impact: Potential system compromise or data leakage
Affected Products
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Product | Affected Versions
Tenda AC7 | 15.03.06.44
How the Exploit Works
The vulnerability, CVE-2025-8017, resides in the function formSetMacFilterCfg of the httpd component in Tenda AC7. A buffer overflow condition occurs when a malicious actor manipulates the argument deviceList. This overflow, being stack-based, can lead to arbitrary code execution. Since the vulnerability can be exploited over the network without any form of authentication, it poses a high risk to the integrity and confidentiality of the system.
Conceptual Example Code
An example of how the vulnerability might be exploited could look something like this:
POST /goform/setMacFilterCfg HTTP/1.1
Host: target.example.com
Content-Type: application/json
{ "deviceList": "AAAAA....[5000 A's].....AAAAA" }Here, the “deviceList” argument is filled with a large number of ‘A’s to overflow the buffer and potentially allow for arbitrary code execution.
Mitigation Guidance
It is crucial to apply the vendor patch as soon as it becomes available. In the interim, using a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can serve as a temporary mitigation measure. It is also recommended to monitor network traffic for any suspicious activities and isolate affected systems to prevent any potential spread in the network.