CVE-2000-0330 in Windows
Summary
by MITRE
The networking software in Windows 95 and Windows 98 allows remote attackers to execute commands via a long file name string, aka the "File Access URL" vulnerability.
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Analysis
by VulDB Data Team • 06/02/2025
The CVE-2000-0330 vulnerability represents a critical buffer overflow flaw in the networking software components of Windows 95 and Windows 98 operating systems. This vulnerability specifically targets the handling of file name strings within the network file sharing protocols, particularly affecting the File Access URL functionality that was integral to the Windows 95 and 98 networking stack. The flaw arises from insufficient bounds checking when processing long file name strings, creating a condition where maliciously crafted input can overwrite adjacent memory locations in the system's execution space.
The technical implementation of this vulnerability stems from improper input validation within the Windows networking subsystem that processes file access requests. When a remote attacker sends a specially crafted file name string that exceeds the allocated buffer size, the system fails to properly terminate or truncate the input before processing it. This buffer overflow condition allows attackers to overwrite critical memory segments including return addresses and executable code pointers, enabling arbitrary code execution with the privileges of the affected service account. The vulnerability operates at the application layer and can be exploited through network-based attacks without requiring local system access, making it particularly dangerous in networked environments.
The operational impact of CVE-2000-0330 extends beyond simple remote code execution to encompass complete system compromise and potential denial of service conditions. Attackers can leverage this vulnerability to gain unauthorized access to affected systems, install backdoors, modify system files, or execute malicious payloads that persist across system reboots. The vulnerability affects the core networking functionality of Windows 95 and 98, which were widely deployed in corporate and home environments during the late 1990s, amplifying the potential attack surface. Organizations running these legacy systems faced significant risk as the vulnerability could be exploited by automated scanning tools and malware, leading to widespread compromise of networked devices.
Mitigation strategies for this vulnerability require immediate patching through Microsoft's security updates, specifically the Windows 95 and 98 service packs that addressed the buffer overflow conditions in the networking stack. Network administrators should implement firewall rules to restrict access to vulnerable services and disable unnecessary file sharing protocols where possible. The vulnerability aligns with CWE-121, which describes stack-based buffer overflow conditions, and maps to ATT&CK technique T1059.007 for command and scripting interpreter usage. Organizations should also consider network segmentation, monitoring for anomalous file access patterns, and implementing intrusion detection systems to identify exploitation attempts. Due to the age of the affected operating systems, the most effective long-term solution involves migrating to supported Windows versions that include modern security features and regular security updates.