CVE-2018-0973 in Windows
Summary
by MITRE
An information disclosure vulnerability exists in the Windows kernel that could allow an attacker to retrieve information that could lead to a Kernel Address Space Layout Randomization (ASLR) bypass, aka "Windows Kernel Information Disclosure 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. This CVE ID is unique from CVE-2018-0887, CVE-2018-0960, CVE-2018-0968, CVE-2018-0969, CVE-2018-0970, CVE-2018-0971, CVE-2018-0972, CVE-2018-0974, CVE-2018-0975.
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Analysis
by VulDB Data Team • 09/13/2025
The vulnerability described in CVE-2018-0973 represents a critical information disclosure flaw within the Windows kernel architecture that fundamentally undermines system security mechanisms. This vulnerability specifically targets the kernel's handling of memory management and address space layout randomization processes, creating opportunities for attackers to extract sensitive kernel memory information. The flaw exists in the way Windows kernel components expose internal memory addresses and system structures through improper error handling or debugging interfaces, potentially allowing adversaries to gain insights into kernel memory layouts that should remain protected from unauthorized access.
The technical implementation of this vulnerability stems from insufficient validation and sanitization of kernel memory access operations, particularly in scenarios involving system calls and kernel object management. When certain kernel functions process requests or handle errors, they inadvertently leak memory addresses or kernel structure information through error messages, debugging output, or response data structures. This information leakage directly impacts the effectiveness of ASLR, a crucial security mitigation that randomizes memory layout addresses to prevent attackers from predicting where critical system components reside in memory. The vulnerability is particularly concerning because it operates at the kernel level, where attackers can leverage this information to craft more sophisticated exploitation techniques against other system components.
The operational impact of CVE-2018-0973 extends beyond simple information disclosure, as it enables attackers to bypass critical security protections that are fundamental to modern operating system security models. By obtaining kernel memory addresses and layout information, threat actors can more effectively target subsequent exploitation attempts, particularly when combined with other vulnerabilities or techniques such as return-oriented programming attacks. This information disclosure creates a pathway for attackers to understand system memory organization and potentially identify useful kernel addresses for exploitation. The vulnerability affects a broad range of Windows operating systems including legacy versions like Windows Server 2008 and Windows Server 2008 R2, as well as newer releases including Windows 10 and Windows Server 2016, making it particularly dangerous due to its widespread impact across the Windows ecosystem. The vulnerability aligns with CWE-200, which categorizes information exposure issues, and represents a significant deviation from secure coding practices that should prevent such leakage of sensitive system information.
Mitigation strategies for this vulnerability primarily focus on applying Microsoft security updates and patches that address the specific kernel memory handling flaws. System administrators should prioritize immediate deployment of the relevant Windows updates that correct the information disclosure behavior in kernel components. Additionally, organizations should implement network segmentation and access controls to limit potential attack vectors, while monitoring for suspicious kernel memory access patterns or unusual system behavior that might indicate exploitation attempts. The vulnerability demonstrates the critical importance of maintaining up-to-date security patches and highlights the risks associated with legacy system support, as older Windows versions like Windows Server 2008 and Windows Server 2008 R2 continue to be vulnerable despite their end-of-life status. Security teams should also consider implementing additional monitoring for kernel-level activities and establishing incident response procedures specifically designed to handle kernel-level information disclosure events that could lead to more serious exploitation attempts.