CVE-2010-3963 in Windows
Summary
by MITRE
Buffer overflow in the Routing and Remote Access NDProxy component in the kernel in Microsoft Windows XP SP2 and SP3 and Server 2003 SP2 allows local users to gain privileges via a crafted application, related to the Routing and Remote Access service (RRAS) and improper copying from user mode to the kernel, aka "Kernel NDProxy Buffer Overflow Vulnerability."
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Analysis
by VulDB Data Team • 01/20/2025
The CVE-2010-3963 vulnerability represents a critical buffer overflow flaw within the Routing and Remote Access service component known as NDProxy in Microsoft Windows operating systems. This vulnerability specifically affects Windows XP Service Pack 2 and 3, as well as Windows Server 2003 Service Pack 2, making it a significant concern for organizations running these legacy systems. The flaw resides in the kernel-level implementation of the Routing and Remote Access service, which is responsible for managing network routing and remote access functionalities within the operating system. The vulnerability stems from improper handling of data when copying information from user mode to kernel mode, creating a scenario where malicious applications can exploit this weakness to execute arbitrary code with elevated privileges.
The technical nature of this vulnerability falls under CWE-121, which describes a stack-based buffer overflow condition, and is classified as a privilege escalation vulnerability within the ATT&CK framework under the Privilege Escalation tactic. The flaw occurs when the NDProxy component processes data from user-space applications without proper bounds checking, allowing an attacker to overflow a buffer in kernel memory. This specific implementation issue affects the kernel-mode driver that handles network proxy operations, where user-mode applications can craft malicious input that gets copied into kernel memory space. The vulnerability is particularly dangerous because it allows local users to escalate their privileges from standard user level to system level, bypassing normal security boundaries that separate user applications from the core operating system kernel.
The operational impact of CVE-2010-3963 extends beyond simple privilege escalation, as it represents a fundamental flaw in how the Windows kernel handles inter-process communication and memory management. Attackers can exploit this vulnerability by creating a specially crafted application that triggers the buffer overflow condition, potentially leading to complete system compromise. Once successfully exploited, the vulnerability enables attackers to execute arbitrary code with kernel-level privileges, which can result in persistent backdoors, data exfiltration, system hijacking, and complete network compromise. The local nature of the exploit means that attackers do not require network access or specialized tools beyond a standard application, making it particularly concerning for environments where users may have access to systems running vulnerable versions of Windows.
Mitigation strategies for this vulnerability include immediate deployment of Microsoft security patches, which address the buffer overflow by implementing proper bounds checking and memory management within the NDProxy component. Organizations should also implement strict access controls and user privilege management to limit local user access, as well as monitor for suspicious system behavior that might indicate exploitation attempts. Network segmentation and endpoint protection solutions can help detect and prevent exploitation attempts, while regular security audits should verify that systems have been properly patched and that vulnerable services are either disabled or properly secured. The vulnerability also highlights the importance of maintaining up-to-date operating system versions and implementing comprehensive patch management processes, as this flaw demonstrates how legacy systems can remain vulnerable to exploitation for years after their initial discovery.