CVE-2005-0061 in Windows
Summary
by MITRE
The kernel of Microsoft Windows 2000, Windows XP SP1 and SP2, and Windows Server 2003 allows local users to gain privileges via certain access requests.
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Analysis
by VulDB Data Team • 07/05/2025
This vulnerability represents a critical privilege escalation flaw within the kernel-level access control mechanisms of several Microsoft Windows operating systems. The issue stems from improper validation of access requests within the kernel security subsystem, allowing local authenticated users to manipulate kernel objects and escalate their privileges from standard user level to system level. The vulnerability specifically affects Windows 2000, Windows XP SP1 and SP2, and Windows Server 2003, all of which share common kernel architectures that implement the same flawed access control logic. This represents a fundamental breakdown in the principle of least privilege enforcement that forms the cornerstone of operating system security models.
The technical implementation of this vulnerability exploits a race condition or improper access validation during kernel object manipulation operations. Attackers can leverage this flaw by crafting specific access requests that bypass normal kernel security checks, effectively allowing them to manipulate kernel data structures or object permissions. The vulnerability typically manifests when the kernel processes access requests without proper validation of the requesting process's credentials or when it fails to properly enforce access control lists on kernel objects. This flaw falls under the CWE-264 category of "Permissions, Privileges, and Access Controls" and specifically relates to improper access control enforcement within kernel space operations. The underlying mechanism often involves manipulation of kernel object handles or improper validation of access rights during kernel API calls.
The operational impact of this vulnerability is severe and potentially catastrophic for affected systems. Local users who can execute code on the target system can leverage this privilege escalation to gain full system administrator privileges, effectively compromising the entire system. This allows attackers to bypass all local security controls, install malicious software, modify system files, access all user data, and potentially establish persistence mechanisms. The vulnerability can be exploited in various scenarios including social engineering attacks where users are tricked into executing malicious code, or through compromised accounts that are already authenticated to the system. From an adversarial perspective, this vulnerability aligns with ATT&CK technique T1068 which involves exploiting legitimate credentials and system access to escalate privileges, and T1059 which encompasses executing malicious code through local system access.
Mitigation strategies for this vulnerability must address both immediate remediation and long-term security posture improvements. The primary and most effective mitigation involves applying the official Microsoft security patches that address the specific kernel access control flaw. Organizations should implement comprehensive patch management processes to ensure all affected systems receive updates promptly. Additionally, system administrators should implement the principle of least privilege by limiting user accounts to minimum required permissions and disabling unnecessary services or features. Network segmentation and monitoring solutions can help detect anomalous privilege escalation activities. The vulnerability also highlights the importance of kernel-level security hardening measures including disabling unnecessary kernel debug features, implementing kernel patch protection, and employing kernel integrity checking mechanisms. Regular security assessments and vulnerability scanning should be conducted to identify systems that may be running unsupported or unpatched versions of the affected operating systems. Organizations should also consider implementing behavioral monitoring solutions that can detect suspicious kernel access patterns consistent with this type of privilege escalation attack.