CVE-2003-0807 in Windows
Summary
by MITRE
Buffer overflow in the COM Internet Services and in the RPC over HTTP Proxy components for Microsoft Windows NT Server 4.0, NT 4.0 Terminal Server Edition, 2000, XP, and Server 2003 allows remote attackers to cause a denial of service via a crafted request.
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Analysis
by VulDB Data Team • 12/31/2024
The vulnerability identified as CVE-2003-0807 represents a critical buffer overflow flaw affecting Microsoft Windows operating systems including Windows NT Server 4.0, NT 4.0 Terminal Server Edition, Windows 2000, Windows XP, and Windows Server 2003. This security weakness specifically targets the COM Internet Services and RPC over HTTP Proxy components, which are integral parts of Microsoft's distributed computing infrastructure. The flaw arises from insufficient input validation mechanisms within these components, allowing malicious actors to exploit memory handling vulnerabilities through carefully crafted network requests. The affected systems operate under the assumption that incoming data will conform to expected parameters, failing to implement adequate boundary checks that would prevent excessive data from overwriting adjacent memory locations.
The technical implementation of this buffer overflow vulnerability stems from improper memory management within the COM Internet Services and RPC over HTTP Proxy modules. When these components process incoming requests, they fail to validate the length of input data against predetermined buffer sizes, creating opportunities for attackers to inject more data than the allocated memory space can accommodate. This condition manifests as a classic stack-based buffer overflow where malicious input overflows the intended buffer boundaries, potentially corrupting adjacent memory segments including return addresses and control data. The vulnerability operates at the application layer and requires no authentication to exploit, making it particularly dangerous as it can be triggered through network-based attacks without requiring privileged access to the target system.
The operational impact of CVE-2003-0807 extends beyond simple denial of service conditions, though that remains the primary immediate consequence. While attackers can reliably cause system crashes and service disruptions through this vulnerability, the underlying memory corruption presents potential for more severe exploitation scenarios. The buffer overflow creates opportunities for code execution attacks, where malicious payload data could overwrite critical program execution paths, potentially allowing remote attackers to gain unauthorized system access. Organizations running affected Microsoft Windows versions face significant risk of service interruptions, system instability, and potential unauthorized access to sensitive information. The widespread adoption of these operating systems in enterprise environments amplifies the potential impact, as multiple systems could be simultaneously compromised through a single successful attack vector.
Mitigation strategies for CVE-2003-0807 require immediate implementation of Microsoft security patches and updates to address the underlying buffer overflow conditions. System administrators should prioritize deployment of the official security updates released by Microsoft to correct the memory handling flaws in the affected components. Network segmentation and firewall configurations should be implemented to restrict access to vulnerable services, particularly the RPC over HTTP Proxy functionality that exposes the system to remote exploitation. Additional protective measures include disabling unnecessary services, implementing intrusion detection systems to monitor for suspicious traffic patterns, and conducting thorough vulnerability assessments to identify any potential exploitation attempts. Organizations should also consider implementing application whitelisting policies and enhanced monitoring of system logs for signs of buffer overflow exploitation attempts. The vulnerability aligns with CWE-121, which describes stack-based buffer overflow conditions, and represents a significant concern within the ATT&CK framework under the T1499 category for network denial of service attacks, highlighting the need for comprehensive defensive strategies.