CVE-2017-8481 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-2017-8480, CVE-2017-8479, CVE-2017-8478, CVE-2017-8476, CVE-2017-8474, CVE-2017-8469, CVE-2017-8462, CVE-2017-0300, CVE-2017-0299, and CVE-2017-0297.
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Analysis
by VulDB Data Team • 08/21/2024
The Windows kernel information disclosure vulnerability identified as CVE-2017-8481 represents a critical security flaw affecting multiple versions of Microsoft Windows operating systems including server and client variants. This vulnerability specifically targets the kernel mode components that handle system-level operations and memory management. The flaw enables authenticated attackers to extract sensitive information from kernel memory spaces through carefully crafted applications that exploit improper validation of input parameters within kernel functions. Such information disclosure vulnerabilities are particularly dangerous because they can reveal system internals that may be leveraged to build more sophisticated attacks. The vulnerability affects 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 installations, demonstrating the widespread impact across Microsoft's product ecosystem.
The technical implementation of this vulnerability stems from inadequate validation mechanisms within kernel components responsible for handling specific system calls or memory operations. Attackers can craft malicious applications that trigger kernel functions to return information from memory locations that should remain protected or inaccessible to user-mode processes. This particular flaw falls under the category of information disclosure vulnerabilities and maps to CWE-200, which specifically addresses the exposure of sensitive information through improper access controls or validation mechanisms. The vulnerability operates at the kernel level, where privilege escalation and memory access controls are paramount for system security. When exploited, the vulnerability allows attackers to access kernel memory contents that may include sensitive data structures, system configuration information, or other confidential details that could aid in subsequent attacks.
The operational impact of CVE-2017-8481 extends beyond simple information disclosure, as the leaked kernel information can serve as a foundation for more advanced exploitation techniques. An attacker who successfully exploits this vulnerability gains access to system internals that could reveal memory layout information, kernel function addresses, or other data that would normally be protected from user-mode access. This information can be particularly valuable for building exploit chains that rely on knowledge of system memory structures, potentially enabling attackers to bypass security mechanisms such as address space layout randomization or kernel address space protection. The vulnerability's classification under the ATT&CK framework would place it within the information gathering phase, specifically targeting system information discovery techniques that could lead to privilege escalation or lateral movement within compromised networks.
Mitigation strategies for CVE-2017-8481 focus on both immediate patching and operational security measures. Microsoft released security updates that address this vulnerability through kernel-level patches that correct the improper validation mechanisms. Organizations should prioritize applying these patches across all affected systems, particularly those running the vulnerable Windows versions mentioned in the vulnerability description. Additionally, implementing principle of least privilege controls can help limit the potential impact of exploitation, as attackers need authenticated access to leverage this vulnerability. Network segmentation and monitoring for suspicious application behavior can also provide early detection of potential exploitation attempts. Security teams should also consider implementing kernel-mode protection mechanisms such as driver signature enforcement and system integrity checks to further reduce the attack surface. The vulnerability highlights the importance of maintaining up-to-date security patches and demonstrates how kernel-level flaws can create cascading security risks that extend far beyond their initial exploitation vector.