CVE-2008-0804 in N5200pro Nas Server Control Panel
Summary
by MITRE
PHP remote file inclusion vulnerability in usrgetform.html in Thecus N5200Pro NAS Server allows remote attackers to execute arbitrary PHP code via a URL in the name parameter.
Be aware that VulDB is the high quality source for vulnerability data.
Analysis
by VulDB Data Team • 10/17/2024
The CVE-2008-0804 vulnerability represents a critical remote file inclusion flaw in Thecus N5200Pro NAS server software, specifically within the usrgetform.html component. This vulnerability exposes the device to remote code execution attacks through improper input validation mechanisms. The flaw occurs when the application fails to adequately sanitize user-supplied input passed through the name parameter, allowing malicious actors to inject URLs that trigger unauthorized code execution on the target system. The vulnerability stems from the application's failure to properly validate or escape user input before processing it, creating an avenue for attackers to leverage the system's web server capabilities for malicious purposes.
This vulnerability falls under the category of CWE-98 - Improper Input Validation, which is classified as a common weakness in software development practices that leads to remote code execution vulnerabilities. The flaw operates at the application layer of the network stack and can be exploited using techniques consistent with the attack pattern described in ATT&CK framework under T1190 - Exploit Public-Facing Application. The vulnerability is particularly dangerous because it allows attackers to execute arbitrary PHP code with the privileges of the web server process, potentially enabling full system compromise. The specific implementation flaw occurs in how the application handles the name parameter within the usrgetform.html file, which lacks proper input sanitization or validation mechanisms to prevent malicious URL injection.
The operational impact of this vulnerability is severe and multifaceted, as it provides attackers with complete control over the affected NAS server. Remote code execution capabilities allow threat actors to install backdoors, exfiltrate sensitive data, modify system configurations, or use the compromised device as a launch point for further attacks within the local network. The N5200Pro device, being a network-attached storage solution, typically contains valuable organizational data, making it an attractive target for cybercriminals. The vulnerability's exploitation requires minimal technical expertise, as attackers can leverage existing web-based attack frameworks to craft malicious payloads that exploit the input validation flaw. The attack surface is broad since the vulnerability affects the web interface of the NAS device, making it accessible over the network to any attacker with knowledge of the target system's configuration.
Mitigation strategies for CVE-2008-0804 should focus on immediate patching and configuration hardening measures. Organizations must apply the vendor-supplied security patches or firmware updates that address the input validation flaw in the usrgetform.html component. Network segmentation and firewall rules should be implemented to restrict access to the NAS device's web interface from untrusted networks. Input validation controls should be strengthened to ensure all user-supplied parameters are properly sanitized and validated before processing. Additionally, the principle of least privilege should be enforced by running the web server with minimal required permissions and by disabling unnecessary features or services. Regular security assessments and vulnerability scanning should be conducted to identify similar flaws in other network services and applications. The remediation process should also include monitoring for suspicious network traffic patterns and implementing intrusion detection systems to identify potential exploitation attempts. Organizations should consider implementing web application firewalls to provide an additional layer of protection against similar remote file inclusion vulnerabilities.