Overview
The cybersecurity landscape is continuously changing, with new threats and vulnerabilities emerging almost daily. One of the most critical vulnerabilities discovered recently is CVE-2025-6371, which affects the D-Link DIR-619L 2.06B01. This vulnerability has been classified as critical due to its potential for remote exploitation and the severity of the damage it can cause, including system compromise or data leakage. It’s particularly concerning as the function it affects is part of an unsupported product, hence putting systems and data at a higher risk.
Vulnerability Summary
CVE ID: CVE-2025-6371
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
D-Link DIR-619L | 2.06B01
How the Exploit Works
This vulnerability resides in the function formSetEnableWizard of the file /goform/formSetEnableWizard in the D-Link DIR-619L 2.06B01. The issue arises from manipulation of the argument curTime leading to a stack-based buffer overflow. This kind of overflow occurs when more data is loaded into a buffer than it can handle, causing excess data to overflow into adjacent memory spaces. Attackers can exploit this overflow to inject and execute malicious code remotely.
Conceptual Example Code
The following conceptual code represents how an attacker might exploit this vulnerability. This is a simple HTTP POST request that sends a malicious payload to the vulnerable function in the formSetEnableWizard file.
POST /goform/formSetEnableWizard HTTP/1.1
Host: target.example.com
Content-Type: application/x-www-form-urlencoded
curTime=AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA...In this example, the ‘curTime’ parameter is filled with an excessive amount of ‘A’ characters, demonstrating a potential buffer overflow attack. The exact nature of the malicious payload would depend on the specific goals of the attacker.
Mitigation Guidance
Due to the nature and severity of this vulnerability, it is strongly recommended to apply the vendor patch as soon as it becomes available. In the meantime, using a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can provide temporary mitigation. These systems can be configured to detect and block attempts to exploit this vulnerability. However, it is crucial to remember that these are only temporary solutions and can’t replace the importance of applying the vendor’s patch or switching to supported products.