CVE-2017-8553 in Windows
Summary
by MITRE
An information disclosure vulnerability exists in Microsoft Windows Server 2008 SP2 and R2 SP1, Windows 8.1, Windows Server 2012 Gold and R2, Windows RT 8.1, and Windows Server 2016 when the Windows kernel improperly handles objects in memory, aka "GDI Information Disclosure Vulnerability".
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Analysis
by VulDB Data Team • 08/21/2024
The vulnerability identified as CVE-2017-8553 represents a critical information disclosure flaw within Microsoft Windows operating systems that affects multiple versions including Windows Server 2008 SP2 and R2 SP1, Windows 8.1, Windows Server 2012 Gold and R2, Windows RT 8.1, and Windows Server 2016. This vulnerability resides in the Windows kernel's handling of graphics device interface GDI objects and falls under the Common Weakness Enumeration category CWE-200, which specifically addresses "Information Exposure" vulnerabilities. The flaw manifests when the kernel fails to properly manage memory objects during graphics processing operations, creating potential pathways for unauthorized information disclosure.
The technical mechanism behind this vulnerability involves improper memory handling within the Windows kernel's graphics subsystem. When processing certain GDI objects, the kernel does not adequately validate or sanitize memory references, allowing for information leakage that could expose sensitive data from kernel memory space. This type of vulnerability typically occurs through memory corruption issues where the system fails to properly manage object lifecycles or memory boundaries, creating opportunities for attackers to extract information about system memory layout, kernel structures, or other sensitive data that should remain protected from user-mode applications.
The operational impact of CVE-2017-8553 extends beyond simple information disclosure, as it provides attackers with valuable insights that can be leveraged for more sophisticated attacks. The leaked information could include kernel memory addresses, system configuration details, or other sensitive data that could be used to bypass security mitigations such as address space layout randomization ASLR or exploit other vulnerabilities in the system. This vulnerability aligns with ATT&CK technique T1059.001 for Command and Scripting Interpreter and T1068 for Exploitation for Privilege Escalation, as the information disclosure can serve as a foundation for privilege escalation attacks. The vulnerability is particularly concerning because it affects multiple Windows versions simultaneously, creating widespread exposure across enterprise environments and increasing the potential attack surface.
Mitigation strategies for CVE-2017-8553 should prioritize immediate patch deployment through Microsoft's security updates, which address the underlying memory handling issues in the kernel's GDI processing routines. Organizations should implement comprehensive monitoring for unusual memory access patterns or information disclosure attempts, particularly in systems where the vulnerability remains unpatched. Network segmentation and privilege minimization can help reduce the potential impact of exploitation, while regular security assessments should verify that systems are properly updated and that no residual vulnerabilities remain. The vulnerability demonstrates the importance of proper memory management in kernel-level components and underscores the need for thorough security testing of graphics subsystems, as these components often represent attack vectors due to their complex memory handling requirements and privileged execution contexts.