Overview
A critical vulnerability, classified under CVE-2025-5789, has been identified in TOTOLINK X15 1.0.0-B20230714.1105, a widely utilized router. This vulnerability affects an unknown part of the file /boafrm/formPortFw of the HTTP POST Request Handler component. It is caused by the manipulation of the ‘service_type’ argument which results in a buffer overflow. This is a significant issue because the exploit not only can be initiated remotely but also has been disclosed to the public, increasing the risk of its potential misuse by malicious actors.
Vulnerability Summary
CVE ID: CVE-2025-5789
Severity: Critical (8.8 CVSS score)
Attack Vector: Network
Privileges Required: None
User Interaction: None
Impact: System compromise and potential data leakage
Affected Products
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Product | Affected Versions
TOTOLINK X15 | 1.0.0-B20230714.1105
How the Exploit Works
The exploit leverages a buffer overflow vulnerability in the HTTP POST Request Handler component of the TOTOLINK X15 router. By manipulating the ‘service_type’ argument in the /boafrm/formPortFw file, an attacker can overflow the buffer, possibly leading to arbitrary code execution or system crashes. This can be carried out remotely without requiring any user interaction or privileges, thus presenting a significant security risk.
Conceptual Example Code
Below is a conceptual example of an HTTP request that could exploit this vulnerability:
POST /boafrm/formPortFw HTTP/1.1
Host: target.example.com
Content-Type: application/x-www-form-urlencoded
service_type=service%20type%20value%20exceeds%20buffer%20limitIn this example, the “service_type” value is manipulated to exceed the buffer limit, thus triggering the overflow.
Mitigation
To mitigate this vulnerability, users are advised to apply the vendor-provided patch as soon as it becomes available. In the meantime, using a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can provide temporary protection against potential exploits. Furthermore, users should consider disabling remote management features if not in use, and implement strong, unique passwords to reduce the risk of unauthorized access.