CVE-2024-48634 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 key parameter in the SetWLanRadioSecurity 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-2024-48634 represents a critical command injection flaw affecting D-Link DIR-882 and DIR-878 wireless routers running specific firmware versions. This security weakness resides within the SetWLanRadioSecurity function of the affected devices' web interface, where the key parameter fails to properly validate or sanitize user input. The flaw enables remote attackers to inject malicious commands that are subsequently executed with the privileges of the web server process, potentially compromising the entire network infrastructure. The vulnerability specifically impacts firmware versions DIR_882_FW130B06 and DIR_878_FW130B08, making these particular device models susceptible to exploitation without requiring authentication or physical access.
The technical nature of this vulnerability aligns with CWE-77 and CWE-94, representing command injection and code injection weaknesses respectively within the Common Weakness Enumeration framework. The flaw operates through a classic parameter manipulation attack vector where the key parameter in the SetWLanRadioSecurity function accepts unvalidated input that gets directly incorporated into system commands. When an attacker crafts a malicious POST request containing specially formatted command sequences in the key parameter, these commands bypass normal input validation mechanisms and execute within the router's operating system context. This allows for arbitrary command execution capabilities that can include file manipulation, network configuration changes, and potentially full system compromise.
The operational impact of CVE-2024-48634 extends beyond simple unauthorized access to encompass complete network infrastructure compromise. An attacker exploiting this vulnerability can gain persistent access to the affected routers, enabling them to modify network settings, redirect traffic, or establish backdoor access points. The vulnerability's remote exploitability means that attackers can target these devices from anywhere on the internet without requiring physical proximity or network credentials, making it particularly dangerous for both residential and enterprise deployments. Network administrators may face significant challenges in detecting such attacks since the malicious commands are executed through legitimate system interfaces, potentially evading traditional security monitoring solutions.
Mitigation strategies for this vulnerability should prioritize immediate firmware updates from D-Link, as the vendor has likely released patches addressing the command injection flaw. Network segmentation and firewall rules should be implemented to restrict access to router management interfaces from untrusted networks, while also monitoring for unusual network traffic patterns that might indicate exploitation attempts. The implementation of web application firewalls and input validation controls can help prevent malicious parameter injection attempts, though these measures are secondary to proper firmware updates. Security teams should also conduct comprehensive network assessments to identify all affected devices and establish monitoring procedures for detecting unauthorized access attempts to router management interfaces. Organizations should consider implementing network access control measures and regular vulnerability scanning to prevent exploitation of similar unpatched firmware vulnerabilities across their infrastructure.