Overview
A severe vulnerability, designated as CVE-2025-8246, has been identified in the TOTOLINK X15 model version 1.0.0-B20230714.1105. This vulnerability is of particular concern due to its critical rating and the potential for attackers to exploit it remotely. The vulnerability lies within a file of an unknown function, /boafrm/formRoute, which forms part of the HTTP POST Request Handler component. The exploitation of this vulnerability could lead to system compromise or data leakage, making this issue a high-priority concern for all users of the affected product.
Vulnerability Summary
CVE ID: CVE-2025-8246
Severity: Critical (8.8 CVSS Score)
Attack Vector: Network
Privileges Required: None
User Interaction: None
Impact: System compromise and data leakage
Affected Products
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Product | Affected Versions
TOTOLINK X15 | 1.0.0-B20230714.1105
How the Exploit Works
The vulnerability within TOTOLINK X15 1.0.0-B20230714.1105 software is exploited through the manipulation of the argument ‘submit-url’. This manipulation leads to a buffer overflow condition, a state where data written to a buffer corrupts data values in memory addresses adjacent to the buffer due to exceeding the buffer’s boundary. Buffer overflows enable attackers to overwrite valuable information, execute malicious code, or cause system crashes.
Conceptual Example Code
Here is a conceptual example of how an HTTP POST request may be manipulated to exploit this vulnerability:
POST /boafrm/formRoute HTTP/1.1
Host: target-device-ip
Content-Type: application/x-www-form-urlencoded
submit-url=/%00...[long string of null bytes]...%00In this example, the ‘submit-url’ field is being filled with a long string of null bytes (%00), causing a buffer overflow in the system’s memory. This could potentially allow an attacker to overwrite critical data or inject malicious code into the system.
Mitigation and Recommendations
To mitigate this vulnerability, users of the affected product are advised to apply the patch provided by the vendor as soon as it becomes available. In the meantime, it is recommended to use Web Application Firewall (WAF) or Intrusion Detection System (IDS) as temporary mitigation measures. Regular monitoring of network traffic and system logs can also help in detecting any unusual activities. Always ensure to maintain a good cybersecurity hygiene by regularly updating and patching your systems, and by adhering to the best practices in securing your network.