Overview
A critical vulnerability has been discovered in TOTOLINK X15 up to version 1.0.0-B20230714.1105, classified under the identifier CVE-2025-6824. This vulnerability is of significant concern as it affects an unknown function of the file /boafrm/formParentControl of the HTTP POST Request Handler component. The vulnerability’s severity lies in its capacity to allow a potential attacker to manipulate the argument ‘submit-url’, leading to a buffer overflow, and can be launched remotely.
The real-world implications of this vulnerability are severe. It allows unauthorized individuals the potential to compromise systems or lead to data leakage. IT administrators managing TOTOLINK X15 devices should be aware of this vulnerability and take immediate action to mitigate potential risks.
Vulnerability Summary
CVE ID: CVE-2025-6824
Severity: Critical (CVSS score of 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
TOTOLINK X15 | Up to 1.0.0-B20230714.1105
How the Exploit Works
The vulnerability stems from the improper handling of HTTP POST requests by the affected TOTOLINK X15 devices. Specifically, the device does not adequately validate or sanitize the ‘submit-url’ argument within the /boafrm/formParentControl file. As such, an attacker can send a specially crafted HTTP POST request that contains an overly long ‘submit-url’ argument, leading to a buffer overflow. This overflow condition allows an attacker to execute arbitrary code or disrupt the normal operation of the device, potentially leading to system compromise or data leakage.
Conceptual Example Code
An attacker could exploit the vulnerability by sending a malicious HTTP POST request similar to the following:
POST /boafrm/formParentControl HTTP/1.1
Host: target.example.com
Content-Type: application/x-www-form-urlencoded
submit-url=[MALICIOUS_PAYLOAD]In the above example, [MALICIOUS_PAYLOAD] would be replaced with a string that is designed to overflow the buffer when processed by the target device.
Please note that this is a simplified and conceptual example. Actual exploitation involves more complex and specific code depending on the target system’s architecture and characteristics.
Recommendations for Mitigation
It is highly recommended that administrators apply the latest patches provided by the vendor. If this is not immediately possible, implementing a Web Application Firewall (WAF) or an Intrusion Detection System (IDS) can help to mitigate the risk by detecting and preventing attempts to exploit this vulnerability. It is also advised to regularly monitor system logs for any unusual activity.