CVE-2003-1248 in H-Sphere
Summary
by MITRE
H-Sphere WebShell 2.3 allows remote attackers to execute arbitrary commands via shell metacharacters in the (1) mode and (2) zipfile parameters in a URL request.
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Analysis
by VulDB Data Team • 07/16/2024
The vulnerability identified as CVE-2003-1248 affects H-Sphere WebShell version 2.3, representing a critical command injection flaw that enables remote attackers to execute arbitrary code on affected systems. This vulnerability resides within the web application's parameter handling mechanisms where the mode and zipfile parameters in URL requests are not properly sanitized or validated. The flaw allows malicious actors to inject shell metacharacters that are subsequently interpreted and executed by the underlying operating system, effectively providing attackers with unauthorized command execution capabilities. The vulnerability is classified under CWE-77 as improper neutralization of special elements used in a command, which is a fundamental weakness in input validation and command construction processes. This issue directly aligns with ATT&CK technique T1059.001 for command and scripting interpreter and T1021.004 for remote services, as it enables attackers to leverage the web shell interface for remote code execution and system compromise.
The technical implementation of this vulnerability exploits the lack of proper input validation in the web application's request processing logic. When the web application receives a URL request containing the mode or zipfile parameters, it directly incorporates these user-supplied values into system commands without adequate sanitization or escaping mechanisms. This creates a direct pathway for attackers to inject malicious shell commands through metacharacters such as semicolons, ampersands, or pipe operators that are interpreted by the shell. The vulnerability is particularly dangerous because it allows attackers to execute commands with the privileges of the web server process, potentially enabling them to access sensitive data, install backdoors, or perform further reconnaissance activities. The impact extends beyond simple command execution as it can facilitate privilege escalation and lateral movement within network environments where the vulnerable web application resides.
The operational implications of CVE-2003-1248 are severe and multifaceted, as it provides attackers with persistent access to compromised systems and enables various malicious activities. Remote code execution capabilities allow threat actors to establish persistent backdoors, exfiltrate data, and maintain unauthorized access to affected systems over extended periods. The vulnerability's exploitation requires minimal technical expertise, making it particularly attractive to attackers who may not possess advanced penetration testing skills. Organizations running H-Sphere WebShell 2.3 are at significant risk of compromise, especially in environments where the web application is exposed to untrusted networks or where it handles sensitive data. The vulnerability can be exploited through simple web browser interactions, making detection and prevention more challenging as the attack vectors are often indistinguishable from legitimate user behavior. This vulnerability also demonstrates poor security practices in web application development, highlighting the importance of proper input validation and secure coding practices.
Mitigation strategies for CVE-2003-1248 should focus on immediate remediation through software updates and configuration changes. The primary solution involves upgrading to a patched version of H-Sphere WebShell that properly validates and sanitizes user input parameters. Organizations should implement comprehensive input validation measures that reject or escape special characters in URL parameters before they are processed by the system. Network segmentation and firewall rules can provide additional layers of protection by limiting access to the vulnerable web application to trusted networks only. Web application firewalls should be configured to detect and block suspicious parameter patterns that may indicate command injection attempts. Regular security audits and penetration testing should be conducted to identify similar vulnerabilities in other applications and systems. The vulnerability also underscores the importance of following secure coding practices such as those outlined in the OWASP Secure Coding Practices and the CERT/CC Secure Coding Standards, which emphasize the need for proper input validation and output encoding to prevent injection attacks. System administrators should also implement monitoring solutions to detect anomalous command execution patterns and establish incident response procedures to address potential compromises.