CVE-2000-0257 in NetWare
Summary
by MITRE
Buffer overflow in the NetWare remote web administration utility allows remote attackers to cause a denial of service or execute commands via a long URL.
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Analysis
by VulDB Data Team • 01/03/2025
The vulnerability identified as CVE-2000-0257 represents a critical buffer overflow flaw within the NetWare remote web administration utility that exposes systems to remote exploitation. This vulnerability specifically affects Novell NetWare operating systems and their associated web administration interfaces, creating a significant security risk for organizations relying on these legacy systems. The flaw stems from inadequate input validation within the web administration utility's handling of Uniform Resource Locators, where the application fails to properly sanitize or limit the length of URL parameters. This oversight creates a condition where malicious actors can craft specially crafted URLs that exceed the allocated buffer space, leading to memory corruption and potential system compromise. The vulnerability operates at the application layer of the network stack and demonstrates a classic example of improper bounds checking in software development practices.
The technical implementation of this buffer overflow exploit involves sending a maliciously constructed URL to the vulnerable NetWare web administration interface, where the excessive input causes the buffer to overflow and overwrite adjacent memory locations. This memory corruption can result in unpredictable behavior including application crashes, system instability, and potentially full system compromise. Attackers can leverage this vulnerability to execute arbitrary code on the target system or cause a denial of service condition that renders the web administration utility unavailable to legitimate users. The attack vector is particularly concerning as it requires no authentication or prior access to the system, making it an attractive target for remote exploitation. This vulnerability directly maps to CWE-121, which describes heap-based buffer overflow conditions, and represents a fundamental flaw in input validation mechanisms that should have been addressed through proper bounds checking and memory management practices.
The operational impact of CVE-2000-0257 extends beyond simple denial of service scenarios to encompass potential complete system compromise and unauthorized access to sensitive network resources. Organizations utilizing vulnerable NetWare systems face significant risks including data breaches, system outages, and potential lateral movement within their network infrastructure. The vulnerability's remote exploitability means that attackers can target these systems from anywhere on the internet without requiring physical access or network credentials, making it particularly dangerous for organizations with exposed web administration interfaces. The long-term implications include potential data loss, system downtime, and regulatory compliance issues for organizations that fail to address this vulnerability in a timely manner. This vulnerability also demonstrates the importance of maintaining up-to-date security patches and the risks associated with legacy systems that may not receive ongoing security support from vendors.
Mitigation strategies for CVE-2000-0257 should include immediate implementation of network segmentation to isolate vulnerable NetWare systems from critical network segments, deployment of web application firewalls to filter malicious URL requests, and application of available vendor patches if they exist for this specific vulnerability. Organizations should also consider disabling the remote web administration utility entirely if it is not essential for operations, as this eliminates the attack surface entirely. Network monitoring should be enhanced to detect unusual URL patterns or malformed requests that may indicate exploitation attempts. The remediation process should align with established security frameworks such as the mitre ATT&CK matrix, where this vulnerability would be categorized under initial access and execution techniques. Regular security assessments and vulnerability scanning should be implemented to identify similar buffer overflow conditions in other applications and systems within the organization's infrastructure. System administrators should also implement proper input validation controls and conduct security code reviews to prevent similar vulnerabilities from being introduced in future software development efforts.