CVE-2003-1448 in Windows
Summary
by MITRE
Memory leak in the Windows 2000 kernel allows remote attackers to cause a denial of service (SMB request hang) via a NetBIOS continuation packet.
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Analysis
by VulDB Data Team • 03/08/2021
The vulnerability identified as CVE-2003-1448 represents a critical memory management flaw within the Windows 2000 kernel that specifically affects the Server Message Block protocol implementation. This memory leak occurs during the processing of NetBIOS continuation packets, which are essential components of the SMB communication mechanism used for file and printer sharing across networked Windows systems. The flaw manifests when the kernel fails to properly release allocated memory resources after handling certain malformed or unexpected SMB requests, leading to progressive memory consumption that ultimately results in system instability and service disruption.
The technical execution of this vulnerability involves remote attackers sending specially crafted NetBIOS continuation packets to Windows 2000 systems that are running SMB services. These packets trigger the kernel's SMB processing routine where the memory leak occurs, typically during the handling of multi-packet requests or when processing malformed SMB headers. The vulnerability operates at the kernel level, making it particularly dangerous as it can be exploited without requiring local system access or authentication credentials. The flaw specifically impacts the Windows 2000 kernel's ability to manage memory allocation for SMB request processing, causing the system to gradually consume available memory resources until the system becomes unresponsive or crashes.
From an operational impact perspective, this vulnerability enables remote attackers to perform denial of service attacks against Windows 2000 systems by simply sending a sequence of malicious SMB requests that exploit the memory leak. The resulting service disruption can manifest as complete SMB service unavailability, system hangs, or complete system crashes that require manual restart to recover. The attack vector is particularly concerning because it can be executed from remote locations without requiring any special privileges or authentication, making it an attractive target for malicious actors seeking to disrupt network services. Organizations running Windows 2000 servers, especially those hosting file shares or print services, face significant risk from this vulnerability as it can be exploited to render critical infrastructure unavailable.
The vulnerability aligns with CWE-401, which describes memory leaks in software systems, and represents a classic example of resource exhaustion attacks that fall under the broader category of denial of service threats. From the MITRE ATT&CK framework perspective, this vulnerability maps to the T1499.004 technique for "Endpoint Denial of Service" and demonstrates how kernel-level flaws can be exploited to achieve persistent service disruption. The attack pattern follows the typical TTPs of remote exploitation, where attackers identify system weaknesses in network protocols and leverage them to cause operational impact. Organizations should note that Windows 2000 reached end-of-life support years ago, making this vulnerability particularly relevant for legacy system environments that have not been properly migrated or patched. The remediation approach requires immediate deployment of Microsoft security patches, system hardening through SMB protocol restrictions, and network segmentation to limit exposure to potentially malicious actors. Additionally, implementing proper monitoring and alerting for unusual SMB traffic patterns can help detect exploitation attempts before they cause significant service disruption.