Overview
A critical vulnerability, classified with a CVSS severity score of 8.8, has been discovered in D-Link DIR-619L 2.04B04. The vulnerability, identified as CVE-2025-4452, resides in the function formSetWizard2 and involves the manipulation of the argument curTime, which can lead to a buffer overflow. This vulnerability is significant as it can be exploited remotely and can potentially lead to system compromise or data leakage. The products affected by this issue are no longer being supported by the maintainer, increasing the risk for users of these products.
Vulnerability Summary
CVE ID: CVE-2025-4452
Severity: Critical (8.8 CVSS Score)
Attack Vector: Remote
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 | 2.04B04
How the Exploit Works
The vulnerability stems from the improper handling of the argument curTime in the function formSetWizard2. This can allow a malicious actor to overflow the buffer by sending a specially crafted request containing an overly long curTime value. This buffer overflow condition can lead to arbitrary code execution, potentially granting the attacker control over the system or leading to data leakage.
Conceptual Example Code
Here’s a conceptual example of how an HTTP request exploiting this vulnerability might look:
POST /formSetWizard2 HTTP/1.1
Host: target.example.com
Content-Type: application/x-www-form-urlencoded
curTime=AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA...In this example, the ‘A’s represent an excessively long string meant to overflow the buffer.
Mitigation Guidance
Since the products affected by this vulnerability are no longer supported by the vendor, it is recommended to apply a vendor patch, if available. If a patch is not available, using a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can provide temporary mitigation. Please ensure that these systems are configured to detect and block attempts to exploit this vulnerability. Long term, consider migrating to newer, supported hardware.