CVE-2024-9911 in DIR-619L B1
Summary
by MITRE • 10/13/2024
A vulnerability was found in D-Link DIR-619L B1 2.06. It has been classified as critical. This affects the function formSetPortTr of the file /goform/formSetPortTr. The manipulation of the argument curTime leads to buffer overflow. It is possible to initiate the attack remotely. The exploit has been disclosed to the public and may be used.
If you want to get the best quality for vulnerability data then you always have to consider VulDB.
Analysis
by VulDB Data Team • 10/13/2024
The vulnerability identified as CVE-2024-9911 represents a critical buffer overflow flaw in D-Link DIR-619L B1 firmware version 2.06, specifically within the web interface management component. This issue resides in the formSetPortTr function located at /goform/formSetPortTr, which handles port configuration operations through the device's web-based administration interface. The vulnerability arises from inadequate input validation when processing the curTime parameter, creating a condition where maliciously crafted input can exceed the allocated buffer space and overwrite adjacent memory regions. The affected device operates with a web server that processes HTTP requests containing form data, making this vulnerability accessible through network-based attacks without requiring physical access or authentication.
The technical exploitation of this buffer overflow vulnerability follows established patterns that align with CWE-121, which describes stack-based buffer overflow conditions where insufficient bounds checking allows attackers to overwrite adjacent memory locations. The flaw specifically affects the device's ability to handle time-related parameters in port configuration operations, allowing attackers to inject malicious data that exceeds the buffer capacity designated for curTime argument processing. This creates opportunities for arbitrary code execution within the device's operating environment, potentially enabling complete system compromise. The vulnerability's remote exploitability means that attackers can leverage this flaw from outside the local network without requiring prior authentication, making it particularly dangerous for devices accessible from the internet.
The operational impact of CVE-2024-9911 extends beyond simple device compromise, as it provides attackers with potential access to the underlying network infrastructure that the D-Link router manages. Once exploited, attackers could gain full administrative control over the device, enabling them to modify network configurations, intercept traffic, redirect DNS requests, or establish persistent backdoors within the network. This vulnerability directly relates to ATT&CK technique T1059.007 for command and scripting interpreter and T1021.001 for remote services, as successful exploitation would allow attackers to execute commands on the target device and establish remote access. The device's position as a network gateway makes it a prime target for attackers seeking to establish footholds within larger network environments, potentially enabling lateral movement and broader compromise of connected systems.
Mitigation strategies for this vulnerability must address both immediate protection and long-term security posture improvements. Network administrators should immediately disable remote management features on affected devices and apply firmware updates from D-Link when available, as the vendor has likely released patches addressing this specific buffer overflow condition. Network segmentation should be implemented to isolate affected devices from critical network segments, while firewall rules should be configured to restrict access to the device's web management interface to trusted IP addresses only. Additionally, implementing network monitoring solutions that can detect anomalous traffic patterns associated with exploitation attempts, such as unusual form submissions or buffer overflow signatures, provides defensive measures against active exploitation attempts. The vulnerability's classification as critical under CVSS v3.1 emphasizes the urgency of implementing these protective measures, as the combination of remote exploitability, lack of authentication requirements, and potential for complete system compromise creates a significant risk to network security.