CVE-2010-0485 in Windows
Summary
by MITRE
The Windows kernel-mode drivers in win32k.sys in Microsoft Windows 2000 SP4, XP SP2 and SP3, Server 2003 SP2, Vista SP1 and SP2, Server 2008 Gold and SP2, Windows 7, and Server 2008 R2 "do not properly validate all callback parameters when creating a new window," which allows local users to execute arbitrary code, aka "Win32k Window Creation Vulnerability."
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Analysis
by VulDB Data Team • 01/21/2025
The CVE-2010-0485 vulnerability represents a critical flaw in the Windows kernel-mode driver component known as win32k.sys which forms the foundation of the Windows graphical user interface subsystem. This vulnerability specifically affects multiple versions of Microsoft Windows operating systems including Windows 2000 through Windows 7, making it one of the most widespread kernel-level security issues in the Windows ecosystem. The flaw resides in how the system handles window creation operations within the kernel, creating a pathway for privilege escalation attacks that can be exploited by local malicious users to execute arbitrary code with system-level privileges.
The technical root cause of this vulnerability stems from inadequate validation of callback parameters during the window creation process within the win32k.sys driver. When applications attempt to create new windows through the Windows API, the kernel-mode driver responsible for managing these operations fails to properly validate all input parameters that are passed to callback functions. This insufficient validation allows an attacker to craft malicious window creation requests that can manipulate the driver's behavior and potentially overwrite critical memory locations. The vulnerability falls under the CWE-125 vulnerability category, which specifically addresses out-of-bounds read conditions that can lead to privilege escalation and code execution. The flaw is particularly dangerous because it operates at the kernel level, where any successful exploitation immediately grants the attacker complete control over the system.
The operational impact of CVE-2010-0485 is severe and far-reaching given the broad range of affected systems. Local attackers who can execute code on a target system can leverage this vulnerability to gain system-level privileges without requiring additional authentication or network access. This makes the vulnerability particularly attractive to attackers who have already achieved initial access through other means such as phishing attacks or drive-by downloads. The attack vector is relatively straightforward since it requires only local execution privileges, meaning that even a compromised user account can potentially escalate to SYSTEM level access. This vulnerability has been widely exploited in the wild, particularly in targeted attacks against enterprise environments where local access might be obtained through social engineering or other initial compromise techniques.
Mitigation strategies for CVE-2010-0485 primarily focus on applying Microsoft security updates and implementing additional security controls to reduce the attack surface. Microsoft released comprehensive patches through the Security Update Rollup for Windows 2000, XP, Server 2003, Vista, and Server 2008 that address the validation issues in win32k.sys. Organizations should prioritize immediate deployment of these patches across all affected systems, as the vulnerability represents a high-severity threat that can be exploited without user interaction or network access. Additional mitigations include implementing user access controls to limit local execution privileges, disabling unnecessary services that might be exploited, and monitoring for suspicious window creation activities through system logging. The vulnerability also aligns with several ATT&CK techniques including privilege escalation through kernel exploits and persistence mechanisms that can be established through system-level code execution. Organizations should also consider implementing application whitelisting policies and enhanced endpoint detection to identify potential exploitation attempts that might not be caught by traditional signature-based detection methods.