Overview
The vulnerability denoted as CVE-2025-6148 was discovered in TOTOLINK A3002RU 3.0.0-B20230809.1615. This vulnerability, rated as critical, presents a serious risk to IT infrastructures that employ this device. The flaw resides in a seemingly innocuous file, /boafrm/formSysLog, which is part of the HTTP POST Request Handler component.
The vulnerability’s impact is vast as it could allow a remote attacker to initiate an attack, potentially leading to system compromise or data leakage. Given the severity of this vulnerability, it’s vital for organizations to be informed and take appropriate actions to mitigate the risk.
Vulnerability Summary
CVE ID: CVE-2025-6148
Severity: Critical (CVSS: 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 A3002RU | 3.0.0-B20230809.1615
How the Exploit Works
The vulnerability arises from a buffer overflow condition in the HTTP POST Request Handler component. Specifically, the flaw is triggered by the improper handling of the ‘submit-url’ argument in the /boafrm/formSysLog file.
An attacker can exploit this flaw by sending a specially crafted HTTP POST request with a manipulated ‘submit-url’ argument. This could overflow the buffer, allowing the attacker to execute arbitrary code or disrupt the normal function of the device, leading to potential system compromise or data leakage.
Conceptual Example Code
A conceptual example of the exploit may look something like this:
POST /boafrm/formSysLog HTTP/1.1
Host: target.example.com
Content-Type: application/x-www-form-urlencoded
submit-url=[MALICIOUS_PAYLOAD]In this example, `[MALICIOUS_PAYLOAD]` would be a string crafted in a specific way that overflows the buffer.
Mitigation Measures
TOTOLINK is expected to release a patch to fix this vulnerability. It’s recommended that all users of the affected software apply this patch as soon as it’s available.
In the meantime, users can implement a Web Application Firewall (WAF) or Intrusion Detection System (IDS) to monitor and block malicious HTTP POST requests. This can serve as a temporary mitigation measure until the patch is applied.