CVE-2002-1436 in NetWare
Summary
by MITRE
The web handler for Perl 5.003 on Novell NetWare 5.1 and NetWare 6 allows remote attackers to execute arbitrary Perl code via an HTTP POST request.
Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.
Analysis
by VulDB Data Team • 09/06/2025
The vulnerability described in CVE-2002-1436 represents a critical remote code execution flaw in the Perl web handler component of Novell NetWare operating systems. This security issue affects Perl 5.003 installations running on NetWare 5.1 and NetWare 6 platforms, creating a significant attack surface that allows malicious actors to gain unauthorized system access through carefully crafted HTTP POST requests. The vulnerability stems from improper input validation and sanitization within the web server's Perl processing module, which fails to adequately filter or escape user-supplied data before executing it as Perl code. This fundamental flaw enables attackers to inject and execute arbitrary Perl scripts directly on the target system, potentially leading to complete system compromise.
The technical nature of this vulnerability aligns with CWE-94, which describes "Improper Control of Generation of Code ('Code Injection')" and falls under the broader category of code injection attacks. The flaw operates by exploiting the web server's handling of HTTP POST requests that contain Perl code within the request parameters or body. When the web handler processes these requests, it fails to distinguish between legitimate user input and malicious code, directly executing the injected Perl commands without proper security checks. This behavior creates a direct pathway for attackers to leverage the system's Perl interpreter to perform unauthorized operations, including file system access, process manipulation, and potentially privilege escalation.
From an operational impact perspective, this vulnerability poses severe risks to organizations relying on NetWare systems for web services. The remote execution capability means that attackers can exploit this flaw from anywhere on the network without requiring local system access or authentication credentials. Successful exploitation can result in complete system takeover, data exfiltration, service disruption, and potential lateral movement within the network infrastructure. The vulnerability affects the core web serving functionality of NetWare systems, making it particularly dangerous for organizations that host web applications or services on these platforms. Network administrators face the challenge of defending against attacks that can occur without detection, as the malicious code execution happens through legitimate web protocols and may not trigger standard intrusion detection systems.
Organizations should implement immediate mitigations including applying available patches from Novell and Perl vendors, implementing network segmentation to isolate affected systems, and deploying web application firewalls to filter suspicious HTTP POST requests. The ATT&CK framework categorizes this vulnerability under T1059.007 "Command and Scripting Interpreter: Perl," highlighting the attack vector through interpreted languages. Security measures should focus on input validation, least privilege principles, and comprehensive monitoring of web server access logs for anomalous POST request patterns. Additionally, system administrators should consider disabling unnecessary Perl web handler functionality and implementing proper access controls to limit the attack surface. The vulnerability underscores the importance of maintaining up-to-date system patches and the critical need for proper input sanitization in web applications to prevent similar code injection vulnerabilities from compromising system integrity.