CVE-2024-48636 in DIR-822
Summary
by MITRE • 10/17/2024
D-Link DIR_882_FW130B06 and DIR_878 DIR_878_FW130B08 were discovered to contain a command injection vulnerability via the VLANID:0/VID parameter in the SetVLANSettings function. This vulnerability allows attackers to execute arbitrary OS commands via a crafted POST request.
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Analysis
by VulDB Data Team • 10/17/2024
The vulnerability identified as CVE-2024-48636 represents a critical command injection flaw affecting D-Link DIR-882 and DIR-878 wireless routers running specific firmware versions. This vulnerability resides within the SetVLANSettings function of the affected devices, specifically targeting the VLANID:0/VID parameter that controls virtual local area network configurations. The flaw stems from inadequate input validation and sanitization mechanisms within the device's web interface, allowing malicious actors to inject arbitrary operating system commands through specially crafted HTTP POST requests.
The technical exploitation of this vulnerability occurs when an attacker submits a malicious POST request containing crafted command sequences within the VLANID:0/VID parameter. The device fails to properly sanitize this input before processing, enabling the execution of arbitrary system commands with the privileges of the web server process. This command injection vulnerability falls under CWE-77 which specifically addresses command injection flaws in software applications. The affected D-Link routers operate with default administrative credentials, making exploitation more accessible to threat actors without requiring additional authentication steps.
The operational impact of this vulnerability extends beyond simple unauthorized command execution, as it provides attackers with complete control over the affected network devices. Once exploited, attackers can modify network configurations, establish persistent backdoors, access sensitive network data, and potentially use the compromised devices as launching points for broader network attacks. This vulnerability aligns with ATT&CK technique T1059.001 for command and script interpreter, specifically targeting the execution of system commands. The compromised routers could serve as pivot points for lateral movement within corporate networks, especially in environments where these devices are deployed without proper network segmentation or monitoring.
Security professionals should immediately implement network segmentation measures to isolate affected devices from critical network segments and deploy intrusion detection systems to monitor for suspicious POST requests targeting the VLAN configuration endpoints. Device firmware updates should be applied as soon as D-Link releases patches addressing this vulnerability, which should include proper input validation and sanitization mechanisms. Network administrators should also consider implementing web application firewalls to filter malicious requests and monitor for unusual command execution patterns. The vulnerability demonstrates the importance of secure input handling in network device firmware and highlights the need for comprehensive security testing of embedded systems before deployment in production environments.