CVE-2018-8468 in Windows
Summary
by MITRE
An elevation of privilege vulnerability exists when Windows, allowing a sandbox escape, aka "Windows Elevation of Privilege Vulnerability." This affects Windows 7, Windows Server 2012 R2, Windows RT 8.1, Windows Server 2008, Windows Server 2012, Windows 8.1, Windows Server 2016, Windows Server 2008 R2, Windows 10, Windows 10 Servers.
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Analysis
by VulDB Data Team • 08/17/2024
The vulnerability identified as CVE-2018-8468 represents a critical elevation of privilege flaw within the Windows operating system family that enables attackers to escape sandbox environments and gain elevated system privileges. This vulnerability specifically impacts multiple Windows versions including Windows 7, Windows Server 2012 R2, Windows RT 8.1, Windows Server 2008, Windows Server 2012, Windows 8.1, Windows Server 2016, Windows Server 2008 R2, Windows 10, and Windows 10 Servers. The flaw exists within the Windows kernel and allows malicious actors to leverage sandbox escape techniques to achieve privilege escalation. This vulnerability is particularly concerning because it can be exploited by attackers who have already gained limited access to a system, enabling them to move from a restricted user context to full administrative privileges.
The technical nature of CVE-2018-8468 stems from improper validation of object handles within the Windows kernel, creating a condition where malicious code can manipulate kernel objects to gain unauthorized access to system resources. This type of vulnerability falls under the Common Weakness Enumeration category CWE-264, which specifically addresses permissions, privileges, and access controls. The flaw manifests when the system fails to properly validate handle references during kernel object operations, allowing attackers to manipulate object pointers and execute arbitrary code with elevated privileges. The vulnerability is classified as a sandbox escape because it enables attackers to break out of restricted execution environments where applications and processes are typically isolated from system-level resources.
The operational impact of this vulnerability is severe as it provides attackers with a pathway to achieve complete system compromise from a sandboxed environment. Attackers can exploit this vulnerability to escalate privileges from standard user accounts to SYSTEM level access, which grants them complete control over the affected system. This includes the ability to install malicious software, modify system files, access sensitive data, and potentially establish persistent backdoors. The vulnerability is particularly dangerous in enterprise environments where users may have access to sandboxed applications or where attackers have already compromised a user session through other attack vectors. The exploitability of this vulnerability means that even a user with minimal privileges can potentially gain full administrative control over the system.
Mitigation strategies for CVE-2018-8468 should include immediate deployment of Microsoft security patches and updates that address the specific kernel object validation flaw. Organizations should implement comprehensive patch management processes to ensure all affected Windows systems receive the necessary updates as quickly as possible. Additionally, security controls should be enhanced through proper access control implementations, network segmentation, and monitoring for suspicious privilege escalation activities. The vulnerability aligns with ATT&CK technique T1068 which covers "Exploitation for Privilege Escalation" and T1190 which addresses "Exploitation of Remote Services." System administrators should also consider implementing additional security measures such as application whitelisting, user access control configurations, and regular security audits to prevent exploitation of this vulnerability. Given the widespread impact across multiple Windows versions, organizations must prioritize comprehensive vulnerability assessment and remediation across their entire Windows infrastructure to prevent potential compromise.