CVE-2012-0180 in Windows
Summary
by MITRE
win32k.sys in the kernel-mode drivers in Microsoft Windows XP SP2 and SP3, Windows Server 2003 SP2, Windows Vista SP2, Windows Server 2008 SP2, R2, and R2 SP1, Windows 7 Gold and SP1, and Windows 8 Consumer Preview does not properly handle user-mode input passed to kernel mode for (1) windows and (2) messages, which allows local users to gain privileges via a crafted application, aka "Windows and Messages Vulnerability."
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Analysis
by VulDB Data Team • 01/21/2025
The vulnerability described in CVE-2012-0180 represents a critical privilege escalation flaw within the Windows kernel-mode driver subsystem, specifically affecting the win32k.sys component that manages user interface elements and windowing operations. This issue resides in the kernel-mode drivers of multiple Microsoft Windows operating systems including XP SP2/SP3, Windows Server 2003 SP2, Windows Vista SP2, Windows Server 2008 SP2/R2/R2 SP1, Windows 7 Gold/SP1, and Windows 8 Consumer Preview. The vulnerability stems from improper handling of user-mode input that is passed to kernel mode for processing of both window operations and message handling mechanisms, creating a dangerous condition where malicious applications can exploit this flaw to execute arbitrary code with elevated privileges.
The technical root cause of this vulnerability lies in the insufficient validation and sanitization of input data within the win32k.sys driver when processing window and message-related operations. When applications attempt to interact with the Windows graphical user interface through kernel-mode functions, the driver fails to properly validate the legitimacy of user-mode input parameters. This allows a local attacker with standard user privileges to craft specially designed applications that manipulate the windowing system to trigger memory corruption conditions. The flaw specifically manifests during the processing of window handles and message queues, where the kernel driver does not adequately check bounds, validate pointers, or ensure proper parameter handling before executing privileged operations. According to CWE classification, this vulnerability maps to CWE-125: Out-of-bounds Read, as the driver reads memory beyond its allocated bounds during window and message processing, and potentially CWE-787: Out-of-bounds Write when attempting to modify kernel memory structures.
The operational impact of CVE-2012-0180 is severe and far-reaching, as it enables local privilege escalation from standard user context to kernel-level privileges without requiring any special authentication or network access. An attacker can exploit this vulnerability by creating a malicious application that leverages the flawed windowing system functions to execute arbitrary code with system-level privileges, effectively compromising the entire operating system. This makes the vulnerability particularly dangerous in environments where users may run untrusted applications or where privilege escalation attacks are possible through social engineering. The attack requires only local system access, making it difficult to detect and prevent through traditional network-based security measures. The vulnerability affects multiple Windows versions simultaneously, amplifying its potential impact across various enterprise and consumer environments.
Mitigation strategies for CVE-2012-0180 should prioritize immediate patch deployment through Microsoft security updates, as the vulnerability was addressed in Microsoft Security Bulletin MS12-006. Organizations should implement comprehensive patch management processes to ensure all affected systems receive the necessary updates promptly. Additionally, system administrators should consider implementing application whitelisting policies to restrict execution of untrusted applications, particularly those that might attempt to interact with kernel-mode windowing functions. Network segmentation and privilege separation can help limit the potential damage if exploitation occurs, while monitoring for unusual kernel-mode activity can aid in early detection of exploitation attempts. The ATT&CK framework categorizes this vulnerability under T1068: Exploitation for Privilege Escalation, highlighting the need for defensive measures that focus on preventing local privilege escalation attacks. System hardening practices such as disabling unnecessary services, implementing least privilege principles, and maintaining current antivirus signatures should also be employed as part of a comprehensive security posture to reduce the attack surface and mitigate potential exploitation of this and similar vulnerabilities.