CVE-2022-46641 in DIR-846
Summary
by MITRE • 12/23/2022
D-Link DIR-846 A1_FW100A43 was discovered to contain a command injection vulnerability via the lan(0)_dhcps_staticlist parameter in the SetIpMacBindSettings function.
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Analysis
by VulDB Data Team • 04/15/2025
The vulnerability identified as CVE-2022-46641 affects the D-Link DIR-846 router model running firmware version A1_FW100A43 and represents a critical command injection flaw within the device's web interface configuration handling. This vulnerability resides in the SetIpMacBindSettings function which processes the lan0_dhcps_staticlist parameter, creating an avenue for malicious actors to execute arbitrary commands on the affected device with elevated privileges. The issue stems from insufficient input validation and sanitization within the router's configuration management system, allowing attackers to inject malicious commands through crafted parameters passed to the affected function.
The technical nature of this vulnerability aligns with CWE-77 and CWE-94, which specifically address command injection and code injection flaws respectively. These weaknesses enable attackers to manipulate the router's underlying operating system by injecting OS commands through the vulnerable parameter. The vulnerability occurs during the processing of dynamic host configuration protocol static list settings, where the device fails to properly validate or sanitize user-supplied input before incorporating it into system commands. This design flaw allows an attacker to inject command sequences that bypass normal access controls and execute with the privileges of the web server process, typically running with administrative privileges on the device.
The operational impact of this vulnerability extends beyond simple unauthorized access, as it provides attackers with complete control over the affected router's functionality and network configuration. Successful exploitation could enable attackers to modify network settings, redirect traffic, install malware, or use the device as a pivot point for further attacks within the local network. The vulnerability affects the router's DHCP static binding functionality, which is commonly used for network management and security purposes, making it particularly dangerous as it targets core network infrastructure components. Network administrators may be unaware of the compromise until unauthorized network modifications occur, as the attack can be executed remotely without requiring physical access to the device.
Mitigation strategies for this vulnerability should include immediate firmware updates from D-Link to address the command injection flaw, along with network segmentation and access control measures to limit exposure. Organizations should implement network monitoring to detect unusual command execution patterns or unauthorized configuration changes. The vulnerability demonstrates the importance of input validation and proper sanitization practices in embedded systems, as outlined in the OWASP Top 10 and NIST cybersecurity frameworks. Additionally, network administrators should disable unnecessary remote management features and implement strong authentication mechanisms to reduce the attack surface. Regular vulnerability assessments and security audits of network infrastructure devices are essential to identify and remediate similar command injection vulnerabilities before they can be exploited by threat actors.