CVE-2024-9910 in DIR-619L B1
Summary
by MITRE • 10/13/2024
A vulnerability was found in D-Link DIR-619L B1 2.06 and classified as critical. Affected by this issue is the function formSetPassword of the file /goform/formSetPassword. The manipulation of the argument curTime leads to buffer overflow. The attack may be launched remotely. The exploit has been disclosed to the public and may be used.
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Analysis
by VulDB Data Team • 10/13/2024
The vulnerability identified as CVE-2024-9910 represents a critical buffer overflow flaw in D-Link DIR-619L B1 version 2.06 wireless router firmware. This vulnerability specifically affects the formSetPassword function within the /goform/formSetPassword file, which is part of the router's web-based administration interface. The flaw arises from improper input validation when processing the curTime parameter, creating an exploitable condition that allows attackers to overwrite adjacent memory locations. The affected device operates with a web server component that handles administrative requests through the goform framework, making the vulnerability accessible through standard web browser interactions.
The technical implementation of this buffer overflow stems from inadequate bounds checking in the firmware's input handling routines. When the curTime parameter is processed by the formSetPassword function, the system fails to validate the length of the input data against the allocated buffer space. This oversight allows an attacker to supply maliciously crafted input that exceeds the buffer boundaries, potentially leading to arbitrary code execution or system crash. The vulnerability's classification as critical reflects the potential for remote code execution, which would enable attackers to gain full administrative control over the affected router. The attack vector is remote, meaning no physical access or local network presence is required to exploit this vulnerability, as it can be triggered through web-based requests to the router's administration interface.
The operational impact of this vulnerability extends beyond simple device compromise, as it creates a persistent security risk for networks utilizing affected D-Link routers. Successful exploitation could allow attackers to modify router configurations, redirect traffic through malicious servers, or establish persistent backdoors for future access. The public disclosure of exploit code further amplifies the threat level, as it removes the barrier to entry for potential attackers who may not possess advanced exploitation skills. Network administrators face the challenge of securing their infrastructure against threats originating from compromised routers, which could serve as stepping stones for broader network infiltration. The vulnerability affects not only individual devices but also entire networks that rely on the compromised router for internet connectivity and local network management.
Mitigation strategies should prioritize immediate firmware updates from D-Link, as the vendor has likely released patches addressing this specific vulnerability. Network segmentation and firewall rules can provide temporary protection by limiting access to the router's administration interface from unauthorized networks. The implementation of intrusion detection systems can help identify exploitation attempts by monitoring for unusual traffic patterns or malformed requests targeting the vulnerable formSetPassword endpoint. Security monitoring should include regular vulnerability scanning of network devices to identify other potentially affected systems running similar firmware versions. Additionally, network administrators should consider implementing network access controls that restrict administrative access to only trusted devices and IP addresses, reducing the attack surface for this and similar vulnerabilities. The vulnerability aligns with CWE-121, which describes stack-based buffer overflow conditions, and represents a potential ATT&CK technique for privilege escalation and persistent access within compromised networks.