Overview
In the rapidly evolving world of cybersecurity, the discovery of new vulnerabilities is a common occurrence. One such vulnerability, CVE-2025-7853, has been recently identified in the Tenda FH451 1.0.0.9, posing a significant threat to the integrity and security of systems worldwide. This critical vulnerability affects the function fromSetIpBind of the file /goform/SetIpBind and can lead to a stack-based buffer overflow.
The severity of this vulnerability stems from its potential to compromise entire systems or lead to data leakage. As it can be exploited remotely, it requires immediate attention and mitigation to prevent attackers from gaining unauthorized access or causing extensive damage.
Vulnerability Summary
CVE ID: CVE-2025-7853
Severity: Critical (CVSS: 8.8)
Attack Vector: Network
Privileges Required: None
User Interaction: None
Impact: System compromise or data leakage
Affected Products
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Product | Affected Versions
Tenda FH451 | 1.0.0.9
How the Exploit Works
The exploit works by manipulating the ‘page’ argument in the fromSetIpBind function. This function is part of the SetIpBind file, which is vital for the operation of the Tenda FH451. By sending a specially crafted request that overflows the buffer, an attacker can cause undefined behavior in the system, which can include overwriting important data, crashing the system, or even executing arbitrary code.
Conceptual Example Code
Here is a
conceptual
example of how this vulnerability might be exploited:
POST /goform/SetIpBind HTTP/1.1
Host: vulnerable-device-ip
Content-Type: application/x-www-form-urlencoded
page=AAAA... [long string of 'A's to overflow the buffer]In this example, the ‘page’ argument is filled with a long string of ‘A’s. If the buffer in the fromSetIpBind function is not properly sized or protected, this could lead to buffer overflow and potential system compromise.
Mitigation
The recommended course of action is to apply the patch provided by the vendor. In cases where application of the patch is not immediately feasible, temporary mitigation can be achieved through the use of a Web Application Firewall (WAF) or an Intrusion Detection System (IDS). These systems can help identify and block malicious traffic, providing an additional layer of security against this vulnerability.