CVE-2020-0615 in Windows
Summary
by MITRE
An information disclosure vulnerability exists in the Windows Common Log File System (CLFS) driver when it fails to properly handle objects in memory, aka 'Windows Common Log File System Driver Information Disclosure Vulnerability'. This CVE ID is unique from CVE-2020-0639.
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Analysis
by VulDB Data Team • 03/20/2024
The Windows Common Log File System CLFS driver vulnerability represents a critical information disclosure flaw that affects the operating system's ability to manage log file operations. This vulnerability specifically impacts the kernel-mode driver responsible for handling common log file system operations, which are essential for various Windows services and applications that require reliable logging mechanisms. The CLFS driver serves as a fundamental component in Windows log management, providing a structured approach to writing and reading log data, particularly in scenarios where transactional integrity is required for logging operations.
The technical flaw manifests when the CLFS driver fails to properly handle objects in memory, creating opportunities for unauthorized information disclosure. This memory handling issue occurs during the processing of log file operations where the driver does not adequately validate or sanitize memory objects before exposing them to user-mode applications. The vulnerability stems from improper memory management practices within the kernel driver, specifically in how it processes and manages log file structures that are stored in memory. According to CWE-200, this represents a weakness where information is inadvertently exposed to unauthorized actors, while the vulnerability aligns with ATT&CK technique T1005 for data from local system and T1059 for command and scripting interpreter.
The operational impact of this vulnerability extends across multiple Windows environments and can potentially allow attackers to extract sensitive information from memory structures. An attacker who successfully exploits this vulnerability could gain access to log data that should remain protected, potentially including sensitive operational data, system configurations, or other confidential information stored in the log file structures. The vulnerability affects Windows 10 versions 1903 and 1909, Windows Server 2019, and Windows Server 2016, making it particularly concerning given the widespread deployment of these operating systems across enterprise environments. The information disclosure could enable further attacks by providing attackers with insights into system operations, user activities, or other sensitive data that might aid in privilege escalation or lateral movement within the network.
Mitigation strategies for this vulnerability primarily focus on applying Microsoft's security patches and updates, which address the memory handling issues in the CLFS driver. Organizations should prioritize deployment of the relevant Windows updates, particularly those released in the May 2020 security bulletin, which specifically address this information disclosure vulnerability. System administrators should also consider implementing additional monitoring and logging controls to detect potential exploitation attempts, while maintaining strict access controls and network segmentation to limit the potential impact of any successful exploitation. The vulnerability's classification under CWE-200 and its relationship to ATT&CK techniques emphasizes the need for comprehensive security hygiene practices including regular patch management, network monitoring, and privileged access management to prevent exploitation and maintain overall system security posture.