Overview
The digital world is increasingly becoming a playground for cybercriminals, and with this comes the urgent need to shed light on potential system vulnerabilities. This blog post focuses on the critical vulnerability found in D-Link DIR-619L 2.06B01, identified as CVE-2025-6374. This issue affects the function formSetACLFilter of the file /goform/formSetACLFilter. It is a matter of significant concern due to its critical severity rating and the potential for remote initiation of an exploit, leading to system compromise or data leakage.
Vulnerability Summary
CVE ID: CVE-2025-6374
Severity: Critical (8.8 CVSS Score)
Attack Vector: Remote (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
The vulnerability lies within the formSetACLFilter function of the file /goform/formSetACLFilter. The improper handling of the ‘curTime’ argument leads to a stack-based buffer overflow. This overflow can be manipulated remotely, leading to potential system compromise or data leakage. The exploit has been disclosed publicly, increasing the risk of its usage by malicious actors.
Conceptual Example Code
The below pseudocode illustrates how an attacker might exploit this vulnerability:
POST /goform/formSetACLFilter HTTP/1.1
Host: target.example.com
Content-Type: application/x-www-form-urlencoded
curTime=AAAAAAAA... (a long string that triggers the stack-based buffer overflow)In the above code, the ‘curTime’ parameter is given a long string of ‘A’s that could potentially overflow the stack buffer, leading to the execution of arbitrary code or crashing the system.
Mitigation Guidance
Due to the critical nature of this vulnerability, it is essential to take mitigation steps immediately. If a vendor patch is available, it should be applied without delay. If no patch is available, the use of a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can offer temporary mitigation. However, note that this vulnerability affects products that are no longer supported by the manufacturer, highlighting the importance of keeping software and devices up-to-date and maintained.