CVE-2017-8478 in Windows
Summary
by MITRE
The kernel in Microsoft Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Windows 8.1, Windows Server 2012 Gold and R2, Windows RT 8.1, Windows 10 Gold, 1511, 1607, 1703, and Windows Server 2016 allows an authenticated attacker to obtain information via a specially crafted application. aka "Windows Kernel Information Disclosure Vulnerability," a different vulnerability than CVE-2017-8491, CVE-2017-8490, CVE-2017-8489, CVE-2017-8488, CVE-2017-8485, CVE-2017-8483, CVE-2017-8482, CVE-2017-8481, CVE-2017-8480, CVE-2017-8479, CVE-2017-8476, CVE-2017-8474, CVE-2017-8469, CVE-2017-8462, CVE-2017-0300, CVE-2017-0299, and CVE-2017-0297.
Once again VulDB remains the best source for vulnerability data.
Analysis
by VulDB Data Team • 12/29/2025
The Windows Kernel Information Disclosure Vulnerability identified as CVE-2017-8478 represents a critical security flaw within Microsoft's kernel implementation that affects multiple operating system versions including Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Windows 8.1, Windows Server 2012 Gold and R2, Windows RT 8.1, Windows 10 Gold, 1511, 1607, 1703, and Windows Server 2016. This vulnerability falls under the category of information disclosure flaws that permit authenticated attackers to extract sensitive kernel information from the system. The flaw specifically resides in how the kernel handles certain data structures and memory management operations, creating an avenue for unauthorized information retrieval that could potentially aid in more sophisticated attacks. The vulnerability is particularly concerning because it operates at the kernel level where privilege escalation and further exploitation attempts become significantly more feasible. According to CWE classification, this vulnerability maps to CWE-200, which describes the exposure of sensitive information to an unauthorized actor, making it a direct descendant of information disclosure weaknesses that are commonly exploited in advanced persistent threat campaigns.
The technical mechanism behind CVE-2017-8478 involves improper validation of input parameters within kernel-mode drivers that process specific system calls. When an authenticated user executes a specially crafted application, the kernel fails to properly sanitize memory access patterns or validate buffer boundaries, leading to information leakage through memory dumps or kernel data structures. This particular flaw does not require administrative privileges for exploitation, as it operates within the context of a standard user session, making it particularly dangerous in environments where user access is more prevalent. The vulnerability manifests when the kernel attempts to process certain memory operations that result in information disclosure, typically through memory corruption or improper access control mechanisms. The attack vector relies on the ability of a malicious application to trigger kernel code paths that have insufficient input validation, allowing the attacker to observe kernel memory contents that should remain protected from user-mode access. This type of vulnerability aligns with ATT&CK technique T1059, specifically focusing on the execution of malicious code through legitimate system interfaces and kernel-level manipulation.
The operational impact of this vulnerability extends beyond simple information disclosure, as the leaked kernel information can be leveraged by attackers to perform more sophisticated exploitation techniques. The disclosed information may include memory addresses, kernel structure layouts, or other sensitive data that could be used to bypass security mechanisms such as address space layout randomization or kernel address space protection. Attackers can utilize the leaked information to craft more precise buffer overflow exploits or to identify kernel vulnerabilities that may have been previously unknown to security researchers. The vulnerability creates a pathway for privilege escalation attacks where an authenticated user can potentially gain elevated system privileges through the information gained from the kernel memory disclosure. Organizations running affected systems are particularly vulnerable because the attack requires minimal privileges and can be executed through standard user applications, making it difficult to detect and prevent. The information disclosure aspect of this vulnerability makes it a valuable asset for threat actors seeking to conduct advanced persistent threats or zero-day exploitation campaigns against enterprise networks. The vulnerability's presence in multiple Windows versions means that organizations must implement comprehensive patch management strategies across their entire infrastructure to prevent potential exploitation attempts that could lead to complete system compromise.
Mitigation strategies for CVE-2017-8478 focus primarily on applying Microsoft security patches and implementing robust access control measures. Organizations should prioritize immediate deployment of the relevant security updates provided by Microsoft, as these patches address the underlying kernel-level validation issues that enable the information disclosure. Additionally, implementing application whitelisting policies and restricting user privileges can help limit the potential impact of exploitation attempts, though these measures do not prevent the vulnerability itself. Network segmentation and monitoring for suspicious kernel-level activity can provide early detection capabilities for potential exploitation attempts. System administrators should also consider implementing runtime protection mechanisms such as kernel-mode protection features or advanced threat detection systems that can identify anomalous memory access patterns. The vulnerability's classification as a kernel-level information disclosure makes it particularly important to maintain up-to-date security configurations and to regularly audit system access controls. Organizations should also conduct security assessments to identify systems running vulnerable versions of Windows and ensure that all patches are applied consistently across their enterprise environments to prevent potential exploitation by threat actors who may be actively targeting this specific vulnerability.