CVE-2000-1024 in eWave ServletExec
Summary
by MITRE
eWave ServletExec 3.0C and earlier does not restrict access to the UploadServlet Java/JSP servlet, which allows remote attackers to upload files and execute arbitrary commands.
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Analysis
by VulDB Data Team • 05/06/2019
The vulnerability identified as CVE-2000-1024 affects eWave ServletExec version 3.0C and earlier, representing a critical security flaw in web application server software that enables unauthorized remote code execution through file upload capabilities. This vulnerability resides within the UploadServlet component of the ServletExec platform, which is designed to handle file uploads from web clients. The flaw stems from insufficient access controls and authentication mechanisms that fail to properly validate user permissions before allowing file upload operations. According to CWE-22, this represents a weakness in access control where the system allows unauthorized access to restricted resources, specifically the file upload functionality. The vulnerability creates a direct pathway for attackers to bypass normal security restrictions and gain control over the affected system.
The technical implementation of this vulnerability occurs when the UploadServlet component lacks proper authorization checks to verify whether the requesting user possesses the necessary privileges to perform file uploads. This absence of access control validation means that any remote attacker can submit files to the server through the upload servlet without proper authentication or authorization. The flaw essentially creates a backdoor through which malicious actors can upload malicious files such as web shells, malicious scripts, or other harmful payloads that can be executed within the server environment. The vulnerability directly maps to ATT&CK technique T1190, which describes the use of unauthorized access to execute commands and establish persistence within target systems. When successful, this vulnerability allows attackers to execute arbitrary commands on the affected server with the privileges of the web application user, potentially leading to complete system compromise.
The operational impact of CVE-2000-1024 is severe and far-reaching, as it enables attackers to gain unauthorized control over web servers running vulnerable versions of ServletExec. Attackers can leverage this vulnerability to upload and execute malicious code, potentially leading to data breaches, system infiltration, and complete server compromise. The vulnerability's remote exploitability means that attackers do not require physical access to the system or local network presence to exploit it. The consequences extend beyond immediate code execution to include potential privilege escalation, data exfiltration, and the establishment of persistent backdoors within the network infrastructure. Organizations running vulnerable versions of eWave ServletExec face significant risk of unauthorized access, as the vulnerability can be exploited by anyone with access to the web application's upload endpoint. The impact is particularly severe in environments where the web server hosts sensitive applications or data, as successful exploitation could lead to complete loss of confidentiality, integrity, and availability of critical business systems.
Mitigation strategies for this vulnerability require immediate action to address the underlying access control flaw. The primary recommendation involves upgrading to a patched version of eWave ServletExec that properly implements access controls for the UploadServlet component. Organizations should also implement network-level restrictions to limit access to the upload servlet endpoint, such as firewall rules that restrict access to specific IP addresses or network segments. Additionally, security measures including input validation, file type restrictions, and content scanning should be implemented to prevent malicious file uploads even if access control measures fail. The implementation of proper authentication mechanisms and role-based access controls within the web application framework is essential to prevent unauthorized access to sensitive servlet components. Security monitoring and intrusion detection systems should be configured to detect and alert on suspicious upload activities, as this vulnerability can be exploited through automated scanning tools that target known vulnerable endpoints. Organizations should also conduct comprehensive vulnerability assessments to identify other potential access control weaknesses within their web application infrastructure, as this vulnerability demonstrates a fundamental flaw in the security architecture that could affect other components of the system.