CVE-2018-8622 in Windows
Summary
by MITRE
An information disclosure vulnerability exists when the Windows kernel improperly handles 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 2008 R2. This CVE ID is unique from CVE-2018-8477, CVE-2018-8621.
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Analysis
by VulDB Data Team • 06/18/2023
The vulnerability described in CVE-2018-8622 represents a critical information disclosure flaw within the Windows kernel's memory management subsystem. This weakness stems from improper handling of kernel objects in memory, creating potential pathways for unauthorized data exposure. The vulnerability affects multiple Windows operating system versions including Windows 7, Windows Server 2012 R2, Windows RT 8.1, Windows Server 2008, Windows Server 2012, Windows 8.1, and Windows Server 2008 R2, indicating a widespread impact across the Windows ecosystem. The flaw specifically resides in how the kernel processes and manages memory objects, potentially allowing attackers to extract sensitive information from kernel memory spaces that should remain protected. This type of vulnerability falls under the CWE-200 category of "Information Exposure" and aligns with ATT&CK technique T1003.001 for OS Credential Dumping, as the information disclosure could potentially lead to credential exposure or system state information that attackers could leverage for further exploitation.
The technical implementation of this vulnerability involves the kernel's failure to properly validate or sanitize memory object references during processing operations. When the Windows kernel handles certain memory objects, it does not adequately check the integrity or access permissions of these objects, potentially allowing information leakage through memory corruption or improper access patterns. Attackers could exploit this by crafting specific memory operations or by leveraging existing privileges to access kernel memory regions that contain sensitive data such as system credentials, encryption keys, or other confidential information. The vulnerability's impact is particularly concerning because it operates at the kernel level where privilege separation is critical, potentially allowing a local attacker with limited privileges to escalate their access or extract information that should remain confidential within the kernel space. This type of information disclosure can serve as a foundation for more sophisticated attacks, including privilege escalation or lateral movement within compromised systems.
The operational impact of CVE-2018-8622 extends beyond simple data exposure, as it creates opportunities for attackers to gather intelligence about system configurations, running processes, and kernel state information. Systems affected by this vulnerability could experience unauthorized access to sensitive kernel data structures, potentially exposing information about memory layouts, system architecture, or security module states. The vulnerability's persistence across multiple Windows versions indicates that organizations running these operating systems face significant risk, particularly in enterprise environments where legacy systems may not have been updated to newer security patches. This information disclosure could enable attackers to bypass security controls by understanding system internals, potentially making subsequent attacks more effective and harder to detect. Organizations may need to implement additional monitoring and access controls to mitigate the risk of exploitation, as the vulnerability could be leveraged in conjunction with other attack vectors to compromise system integrity.
Mitigation strategies for CVE-2018-8622 should focus on immediate patch deployment and enhanced system monitoring. Microsoft released security updates addressing this vulnerability through regular Windows updates, and organizations should prioritize applying these patches across all affected systems. Additionally, implementing memory protection mechanisms such as Data Execution Prevention and Address Space Layout Randomization can help reduce the effectiveness of exploitation attempts. Network segmentation and least privilege access controls should be enforced to limit potential damage from successful exploitation. Security monitoring should include detection of anomalous memory access patterns and unusual kernel object handling that might indicate exploitation attempts. Organizations should also consider implementing endpoint detection and response solutions that can identify suspicious behavior patterns associated with memory manipulation attacks. The vulnerability's classification as a kernel-level information disclosure aligns with ATT&CK technique T1069.001 for Permission Groups Discovery, as exploitation could reveal system security configurations and access controls that attackers might use to refine their attack strategies. Regular security assessments and vulnerability scanning should be conducted to identify systems that may not have received the necessary security updates, particularly in environments where patch management processes are delayed or incomplete.