CVE-2010-4398
HIGHCVSS Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Lifecycle Timeline
5Tags
Description
Stack-based buffer overflow in the RtlQueryRegistryValues function in win32k.sys in Microsoft Windows XP SP2 and SP3, Windows Server 2003 SP2, Windows Vista SP1 and SP2, Windows Server 2008 Gold, SP2, and R2, and Windows 7 allows local users to gain privileges, and bypass the User Account Control (UAC) feature, via a crafted REG_BINARY value for a SystemDefaultEUDCFont registry key, aka "Driver Improper Interaction with Windows Kernel Vulnerability."
Analysis
A stack-based buffer overflow in win32k.sys RtlQueryRegistryValues function allows local privilege escalation and UAC bypass on Windows XP through Windows 7 via crafted REG_BINARY registry values.
Technical Context
The CWE-787 flaw is triggered when win32k.sys reads a REG_BINARY registry value with a length exceeding the expected stack buffer size. The kernel-mode driver copies the oversized data onto the stack, allowing an attacker to overwrite the return address and execute arbitrary kernel-mode code.
Affected Products
['Microsoft Windows XP SP2/SP3', 'Microsoft Windows Server 2003 SP2', 'Microsoft Windows Vista SP1/SP2', 'Microsoft Windows Server 2008 SP2 and R2', 'Microsoft Windows 7']
Remediation
Apply Microsoft security update MS11-011. Migrate to modern Windows versions with kernel exploit mitigations (SMEP, kCFG, kASLR). Monitor for suspicious registry modifications.
Priority Score
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External POC / Exploit Code
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