Overview
A critical vulnerability known as CVE-2025-6367 has been identified in the D-Link DIR-619L 2.06B01. This vulnerability is of great concern due to the potential for system compromise and data leakage. The exploit affects the unknown code of the file /goform/formSetDomainFilter, and the attack can be initiated remotely. This vulnerability is particularly concerning as it affects products that are no longer supported by the maintainer, meaning that patches and updates may not be readily available.
This blog post aims to provide a detailed overview of CVE-2025-6367, discussing the severity, impact, and affected products. It will also explore how the exploit works, along with a conceptual example of how this vulnerability might be exploited.
Vulnerability Summary
CVE ID: CVE-2025-6367
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
The vulnerability lies in the file /goform/formSetDomainFilter. The argument curTime/sched_name_%d/url_%d is manipulated leading to a stack-based buffer overflow. This overflow can cause the system to crash or, in more serious cases, allow the attacker to execute arbitrary code.
The exploit can be initiated remotely, without any interaction from the user. Given that the exploit has been publicly disclosed, the risk of potential attacks is even higher.
Conceptual Example Code
Below is a
conceptual
example of how the vulnerability might be exploited using an HTTP request:
POST /goform/formSetDomainFilter HTTP/1.1
Host: target.example.com
Content-Type: application/x-www-form-urlencoded
curTime=0&sched_name_%d=OverflowString&url_%d=OverflowStringIn this hypothetical example, ‘OverflowString’ represents a string that is too long for the buffer to handle, triggering the overflow.
Mitigation Guidance
As the affected product is no longer supported by the maintainer, a vendor patch may not be available. Users are advised to apply a Web Application Firewall (WAF) or an Intrusion Detection System (IDS) as a temporary mitigation method against this exploit. Please be aware that this is only a temporary solution and cannot guarantee complete protection against the exploit.
Further protective measures could include isolating the affected device from the network or replacing it with a device that is currently supported and regularly receiving security updates.