CVE-2024-9785 in DIR-619L B1
Summary
by MITRE • 10/10/2024
A vulnerability classified as critical was found in D-Link DIR-619L B1 2.06. Affected by this vulnerability is the function formSetDDNS of the file /goform/formSetDDNS. The manipulation of the argument curTime leads to buffer overflow. The attack can be launched remotely. The exploit has been disclosed to the public and may be used.
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Analysis
by VulDB Data Team • 10/15/2024
This critical vulnerability resides within the D-Link DIR-619L B1 2.06 router firmware, specifically targeting the formSetDDNS function located in the /goform/formSetDDNS file. The flaw manifests as a buffer overflow condition that occurs when processing the curTime argument, representing a fundamental memory safety issue that allows attackers to manipulate the device's memory allocation. The vulnerability's remote exploitability means that malicious actors can trigger the buffer overflow without requiring physical access to the device, making it particularly dangerous for network-connected systems. This type of vulnerability directly maps to CWE-121, which describes buffer overflow conditions where insufficient bounds checking allows attackers to overwrite adjacent memory locations, potentially leading to arbitrary code execution or system compromise.
The operational impact of this vulnerability extends beyond simple device disruption, as it provides attackers with potential pathways for complete system takeover. When the curTime parameter exceeds the allocated buffer size, the overflow can overwrite critical program variables, return addresses, or function pointers within the router's memory space. This memory corruption can lead to unpredictable behavior including system crashes, denial of service conditions, or more severely, the execution of malicious code that could allow attackers to gain persistent access to the network. The public disclosure of exploitation techniques significantly increases the risk profile, as threat actors can readily leverage this vulnerability without requiring advanced technical skills to develop custom exploits.
Security professionals should recognize this vulnerability as a prime candidate for exploitation under the MITRE ATT&CK framework, particularly mapping to techniques involving privilege escalation and remote code execution. The attack surface encompasses not only the immediate device but also any network resources that may be accessible through compromised router functionality. Organizations should implement immediate mitigations including firmware updates from D-Link, network segmentation to isolate affected devices, and monitoring for unusual traffic patterns that might indicate exploitation attempts. The vulnerability's classification as critical underscores the need for rapid remediation, as the combination of remote exploitability, public disclosure, and the potential for complete system compromise creates an urgent security risk that demands immediate attention from network administrators and security teams responsible for protecting enterprise and home network infrastructures.