Overview
The cybersecurity landscape is fraught with vulnerabilities, and D-Link DIR-619L version 2.06B01 is the latest product to fall prey to a significant one. Classified as critical with a Common Vulnerability Scoring System (CVSS) score of 8.8, this vulnerability specifically impacts the function form_portforwarding of the file /goform/form_portforwarding. The vulnerability arises from a manipulation of certain arguments, which results in a stack-based buffer overflow.
This vulnerability matters because it can be exploited remotely and has been publicly disclosed, meaning malicious actors may have the tools required to launch an attack. Moreover, it affects products that are no longer supported by the maintainer, making it a potential ticking time bomb for unsuspecting users.
Vulnerability Summary
CVE ID: CVE-2025-6114
Severity: Critical, CVSS Score 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 is a result of insufficient input validation in the form_portforwarding function of the file /goform/form_portforwarding. The manipulation of the argument ingress_name_%d/sched_name_%d/name_%d triggers a stack-based buffer overflow. A buffer overflow occurs when more data is written to a buffer than it can handle, overriding adjacent memory locations. This can result in unpredictable behavior, including system crashes, incorrect data, or code execution.
Conceptual Example Code
Consider this conceptual example of how the vulnerability might be exploited using an HTTP POST request. An attacker would send a crafted request with a malicious payload designed to overflow the buffer and potentially execute arbitrary code.
POST /goform/form_portforwarding HTTP/1.1
Host: target.example.com
Content-Type: application/x-www-form-urlencoded
ingress_name_1=sched_name_1=name_1=A*50000In the example above, ‘A*50000’ represents a string of 50,000 ‘A’ characters, which could exceed the buffer’s capacity and trigger the overflow.
Please note that this is a conceptual example and not actual exploit code. The actual exploit would depend on various factors, including the specific configuration of the targeted system.