CVE-2018-8408 in Windows
Summary
by MITRE
An information disclosure vulnerability exists when the Windows kernel improperly initializes objects in memory, 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.
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Analysis
by VulDB Data Team • 06/06/2023
The vulnerability identified as CVE-2018-8408 represents a critical information disclosure flaw within the Windows kernel component that stems from improper object initialization in memory. This issue manifests when the kernel fails to adequately initialize certain memory objects during their creation process, potentially leaving sensitive data remnants in memory locations that should be cleared or properly configured. The flaw affects a broad range of Windows operating systems including legacy versions like Windows 7 and Windows Server 2008, as well as more recent releases such as Windows 10 and Windows Server 2016, creating a substantial attack surface across multiple platform versions. The vulnerability falls under the CWE-215 category of "Information Exposure Through Memory Corruption" which specifically addresses situations where memory corruption leads to unintended information disclosure, making it particularly concerning from a security perspective as it can expose sensitive kernel data to unauthorized access.
The technical exploitation of this vulnerability occurs through the manipulation of kernel object initialization routines where insufficient memory clearing or improper initialization sequences leave residual data accessible to malicious processes. When Windows kernel components create or modify objects in memory, the improper initialization process can result in information leakage that may include cryptographic keys, security tokens, or other sensitive kernel data structures. Attackers can potentially leverage this information to gain deeper insights into the system's internal state, which could subsequently aid in more sophisticated attacks such as privilege escalation or bypassing security mechanisms. The vulnerability's impact is amplified by the fact that it operates at the kernel level where processes have the highest privileges and access to critical system resources, making any information disclosure particularly dangerous.
The operational impact of CVE-2018-8408 extends beyond simple information leakage as it creates potential pathways for advanced persistent threats and privilege escalation attacks. Security researchers have noted that this vulnerability can be exploited in conjunction with other techniques to build more comprehensive attack chains, particularly in environments where attackers have already gained some level of access. The information disclosed through this vulnerability may include memory addresses, kernel data structures, or security-related values that can significantly aid in bypassing exploit mitigations such as address space layout randomization and data execution prevention. Organizations running affected systems face increased risk of successful exploitation attempts, particularly in targeted attacks where adversaries have detailed knowledge of the system environment and can craft specific payloads to leverage the information disclosure for more severe outcomes.
Mitigation strategies for CVE-2018-8408 primarily focus on applying the Microsoft security updates that address the kernel object initialization flaw, with patch management being the primary defense mechanism. System administrators should prioritize deployment of the relevant security patches as soon as they become available, as the vulnerability can be exploited remotely without user interaction in certain scenarios. Additional protective measures include implementing robust memory protection mechanisms, monitoring for unusual memory access patterns, and maintaining comprehensive system monitoring to detect potential exploitation attempts. The vulnerability aligns with ATT&CK technique T1068 which covers "Exploitation for Privilege Escalation" and demonstrates how information disclosure vulnerabilities can serve as precursors to more serious security incidents. Organizations should also consider implementing network segmentation and access controls to limit the potential damage from successful exploitation attempts, while maintaining regular security assessments to identify and remediate similar vulnerabilities across their infrastructure.