CVE-2012-0001 in Windows
Summary
by MITRE
The kernel in Microsoft Windows XP SP2, Windows Server 2003 SP2, Windows Vista SP2, Windows Server 2008 SP2, R2, and R2 SP1, and Windows 7 Gold and SP1 does not properly load structured exception handling tables, which allows context-dependent attackers to bypass the SafeSEH security feature by leveraging a Visual C++ .NET 2003 application, aka "Windows Kernel SafeSEH Bypass Vulnerability."
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Analysis
by VulDB Data Team • 03/20/2021
The Windows kernel vulnerability identified as CVE-2012-0001 represents a critical security flaw in Microsoft operating systems that undermines the SafeSEH protection mechanism designed to prevent buffer overflow exploits. This vulnerability specifically affects Windows XP SP2, Windows Server 2003 SP2, Windows Vista SP2, Windows Server 2008 SP2 and R2, Windows Server 2008 R2 SP1, and Windows 7 Gold and SP1 versions. The flaw enables attackers to bypass the SafeSEH security feature through manipulation of structured exception handling tables, creating a pathway for exploitation that directly targets the kernel's security architecture.
The technical root cause of this vulnerability lies in the kernel's improper handling of structured exception handling tables during application execution. SafeSEH was implemented as a mitigation technique to prevent attackers from overwriting the structured exception handler table entries, which are critical for proper program execution and crash handling. However, this vulnerability allows context-dependent attackers to leverage Visual C++ .NET 2003 applications to bypass these protections, effectively rendering the SafeSEH mechanism ineffective. The vulnerability specifically manifests when the kernel fails to properly validate or process the structured exception handling tables, creating opportunities for attackers to inject malicious code that can execute with kernel privileges.
The operational impact of this vulnerability is severe as it provides attackers with a means to escalate privileges and gain unauthorized access to system resources. When exploited successfully, the vulnerability allows attackers to bypass kernel-level security protections that are fundamental to maintaining system integrity and preventing malicious code execution. This bypass capability enables attackers to execute arbitrary code with elevated privileges, potentially leading to complete system compromise and unauthorized access to sensitive data. The vulnerability's exploitation requires specific conditions related to the Visual C++ .NET 2003 application environment, making it particularly dangerous in environments where legacy applications are still in use.
Mitigation strategies for this vulnerability involve implementing the security patches provided by Microsoft through regular security updates and service packs. System administrators should ensure that all affected systems receive the appropriate updates that address the kernel's structured exception handling table processing flaws. Additionally, organizations should implement network segmentation and access controls to limit the potential impact of exploitation. The vulnerability aligns with CWE-122, which describes improper restriction of operations within the bounds of a memory buffer, and relates to ATT&CK technique T1068, which covers 'Exploitation for Privilege Escalation'. Organizations should also consider implementing application whitelisting policies and monitoring for suspicious execution patterns that might indicate exploitation attempts. Regular security assessments and vulnerability scanning should be conducted to identify systems that remain unpatched or potentially vulnerable to similar exploitation techniques.