CVE-2003-1407 in Windows
Summary
by MITRE
Buffer overflow in cmd.exe in Windows NT 4.0 may allow local users to execute arbitrary code via a long pathname argument to the cd command.
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Analysis
by VulDB Data Team • 02/02/2025
The vulnerability identified as CVE-2003-1407 represents a critical buffer overflow flaw in the command interpreter component of Windows NT 4.0 systems. This issue specifically affects the cmd.exe executable which serves as the primary command-line interface for executing system commands and managing file operations. The vulnerability manifests when the cd command processes a pathname argument that exceeds the allocated buffer size, creating an exploitable condition that can be leveraged by malicious actors. The affected Windows NT 4.0 operating system, which was released in 1996 and had reached end-of-life status by 2004, contains a fundamental flaw in its command processing logic that fails to properly validate input length before copying data into fixed-size memory buffers.
The technical nature of this buffer overflow stems from improper bounds checking within the command processing routine of cmd.exe. When users execute the cd command with an excessively long pathname argument, the system attempts to copy this input data into a predetermined memory buffer without sufficient validation of the input size. This classic buffer overflow condition occurs because the application assumes that input data will not exceed a certain length and allocates a fixed buffer size accordingly. The flaw is categorized under CWE-121 as a stack-based buffer overflow, where insufficient bounds checking allows an attacker to overwrite adjacent memory locations including return addresses and control data. The vulnerability operates at the kernel level within the operating system's command processing subsystem, making it particularly dangerous as it can be exploited by local users without requiring network connectivity or elevated privileges beyond normal user access.
The operational impact of this vulnerability extends beyond simple command execution failures and presents a significant security risk to organizations still operating legacy Windows NT 4.0 systems. Local users with basic account privileges can potentially leverage this flaw to execute arbitrary code with the privileges of the targeted process, which typically runs with system-level permissions when processing command-line operations. The exploitability of this vulnerability is enhanced by the fact that it requires no special network access or complex attack vectors, making it particularly dangerous in environments where users have legitimate access to command-line interfaces. This condition can lead to complete system compromise, data exfiltration, and persistent backdoor access. The attack vector aligns with ATT&CK technique T1059.003 for command and scripting interpreter, specifically targeting the Windows Command Shell component. Organizations running Windows NT 4.0 systems were particularly vulnerable as these legacy platforms had not received security updates for over a decade, leaving them exposed to known exploitation techniques that have been documented and weaponized in the cybersecurity landscape.
Mitigation strategies for CVE-2003-1407 should prioritize immediate system decommissioning or migration to supported operating system versions, as the vulnerability exists in a platform that has been officially discontinued by Microsoft. For organizations unable to immediately replace legacy systems, implementing strict access controls and limiting user privileges can help reduce the attack surface, though this does not eliminate the fundamental vulnerability. System administrators should disable unnecessary command-line interfaces and implement input validation controls where possible, although the core flaw exists within the operating system's kernel components. Network segmentation and monitoring solutions can help detect exploitation attempts, while regular security assessments should identify and isolate any remaining Windows NT 4.0 systems within the infrastructure. The vulnerability demonstrates the critical importance of maintaining up-to-date security patches and the dangers of operating unsupported legacy systems in production environments, as the exploitation techniques for this flaw have been widely documented and remain relevant in modern cybersecurity contexts. Organizations should also implement comprehensive incident response procedures to address potential exploitation attempts and ensure proper system hardening practices are maintained across all operational platforms.