Overview
A critical vulnerability, CVE-2025-8244, has been discovered in TOTOLINK X15 1.0.0-B20230714.1105. This vulnerability poses a serious threat to the integrity, confidentiality, and availability of the affected systems. As the vulnerability is found in a commonly used router, it has the potential to impact a large number of users globally. The severity of this vulnerability lies in its ability to be exploited remotely, with the potential for system compromise or data leakage.
Vulnerability Summary
CVE ID: CVE-2025-8244
Severity: Critical (8.8 CVSS score)
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 | 1.0.0-B20230714.1105
How the Exploit Works
The exploit takes advantage of a buffer overflow vulnerability within an unknown function of the file /boafrm/formMapDelDevice in the HTTP POST request handler component of the TOTOLINK X15. Specifically, it involves the improper handling and validation of the argument ‘macstr’. An attacker can manipulate this argument to cause a buffer overflow condition, potentially leading to arbitrary code execution.
Conceptual Example Code
Here is a conceptual example of how the vulnerability might be exploited:
POST /boafrm/formMapDelDevice HTTP/1.1
Host: vulnerable-router-ip
Content-Type: application/x-www-form-urlencoded
macstr=AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA... [continue until buffer overflow is triggered]This example is oversimplified for illustrative purposes. In a real attack scenario, the ‘A’ characters would typically be replaced with carefully crafted input designed to execute arbitrary commands or code.
Mitigation
Users are recommended to apply the vendor patch as soon as possible to mitigate this vulnerability. In the absence of a patch, users may employ Web Application Firewalls (WAF) or Intrusion Detection Systems (IDS) as temporary mitigation measures. However, these should be seen as temporary solutions, as they may not fully protect against all potential attack vectors related to this vulnerability. For comprehensive protection, the vendor-supplied patch should be applied.