Overview
The cybersecurity world has once again been stirred by the discovery of a critical vulnerability, CVE-2025-5790, found in TOTOLINK X15’s firmware version 1.0.0-B20230714.1105. This vulnerability has severe implications for users of the affected device, as it potentially exposes systems to compromise and data leakage. The significance of this issue is underlined by its high CVSS Severity Score of 8.8, indicating that its successful exploitation could have a severe impact on the confidentiality, integrity, and availability of user data and systems.
Vulnerability Summary
CVE ID: CVE-2025-5790
Severity: Critical (CVSS: 8.8)
Attack Vector: Network
Privileges Required: None
User Interaction: None
Impact: Potential 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 exploit involves the manipulation of the ‘mac’ argument in the HTTP POST request handler file /boafrm/formIpQoS. By supplying an excessively long string to this argument, an attacker can trigger a buffer overflow. This overflow can potentially allow the attacker to execute arbitrary code or cause the system to crash, leading to a denial of service.
Conceptual Example Code
Here’s a conceptual example of how an HTTP POST request could potentially exploit this vulnerability:
POST /boafrm/formIpQoS HTTP/1.1
Host: target.example.com
Content-Type: application/x-www-form-urlencoded
mac=aabbccddeeffgghhiijjkkllmmnnooppqqrrssttuuvvwwxxyyzzIn this example, the ‘mac’ parameter is filled with a string that exceeds the expected length, potentially leading to a buffer overflow.
Mitigation
Users of TOTOLINK X15 version 1.0.0-B20230714.1105 are advised to apply the vendor-provided patch as soon as it’s available. As a temporary mitigation, the use of a Web Application Firewall (WAF) or Intrusion Detection System (IDS) is recommended to monitor and block suspicious activities. It’s also advisable to restrict network access to the affected devices and not expose them to the internet until a patch is applied.