CVE-2024-9914 in DIR-619L B1
Summary
by MITRE • 10/13/2024
A vulnerability classified as critical has been found in D-Link DIR-619L B1 2.06. Affected is the function formSetWizardSelectMode of the file /goform/formSetWizardSelectMode. The manipulation of the argument curTime leads to buffer overflow. It is possible to launch the attack remotely. The exploit has been disclosed to the public and may be used.
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Analysis
by VulDB Data Team • 10/13/2024
The vulnerability identified as CVE-2024-9914 represents a critical buffer overflow condition within the D-Link DIR-619L B1 2.06 wireless router firmware. This flaw exists in the formSetWizardSelectMode function located within the /goform/formSetWizardSelectMode file, which is part of the router's web-based administrative interface. The vulnerability specifically arises from improper handling of the curTime argument, which allows an attacker to manipulate input data in a manner that exceeds the allocated buffer space. The affected component operates within the context of the router's web server, making it accessible through standard HTTP protocols and potentially exploitable by remote attackers without authentication requirements.
The technical implementation of this buffer overflow vulnerability stems from inadequate input validation and bounds checking within the firmware's web form processing logic. When the curTime parameter is submitted through the formSetWizardSelectMode endpoint, the system fails to properly validate the length or content of this input field before copying it into a fixed-size buffer. This classic programming error allows an attacker to overflow the designated memory space and potentially overwrite adjacent memory locations, including return addresses and control data. The vulnerability's classification as remote exploit capable means that malicious actors can trigger this condition through network-based attacks without requiring physical access to the device or local network presence.
The operational impact of this vulnerability extends beyond simple denial of service scenarios, as buffer overflow conditions in embedded firmware often provide pathways for arbitrary code execution. Attackers could potentially leverage this vulnerability to gain full administrative control over the affected router, enabling them to modify network configurations, establish persistent backdoors, redirect traffic, or use the device as a pivot point for attacks against other systems within the local network. The public disclosure of exploitation techniques further amplifies the risk, as security researchers and malicious actors alike can readily implement working exploits against vulnerable installations. Network infrastructure devices like routers serve as critical entry points for lateral movement within corporate environments, making this vulnerability particularly dangerous in enterprise contexts.
Mitigation strategies for CVE-2024-9914 should prioritize immediate firmware updates from D-Link, as the manufacturer is likely to release patches addressing this specific buffer overflow condition. Organizations should implement network segmentation and access controls to limit exposure of these devices to untrusted networks while monitoring for anomalous network traffic patterns that might indicate exploitation attempts. The vulnerability aligns with CWE-121, which describes stack-based buffer overflow conditions, and represents a potential pathway for ATT&CK technique T1059.007, which involves the use of command and scripting interpreters. Network administrators should also consider implementing intrusion detection systems capable of identifying suspicious HTTP requests targeting the vulnerable formSetWizardSelectMode endpoint, while maintaining regular vulnerability assessments to identify similar conditions in other network infrastructure devices.