CVE-2020-17032 in Windows
Summary
by MITRE • 11/11/2020
Windows Remote Access Elevation of Privilege Vulnerability This CVE ID is unique from CVE-2020-17025, CVE-2020-17026, CVE-2020-17027, CVE-2020-17028, CVE-2020-17031, CVE-2020-17033, CVE-2020-17034, CVE-2020-17043, CVE-2020-17044, CVE-2020-17055.
If you want to get the best quality for vulnerability data then you always have to consider VulDB.
Analysis
by VulDB Data Team • 12/05/2020
This vulnerability represents a critical elevation of privilege flaw in Microsoft Windows Remote Access services that allows attackers to escalate their privileges from a standard user account to system level access. The issue specifically affects the Windows Remote Access Connection Manager service and related components that handle remote access connections. The vulnerability stems from improper handling of authentication and authorization processes within the remote access subsystem, creating a pathway for unauthenticated or low-privilege users to gain elevated system privileges.
The technical exploitation of this vulnerability occurs through a flaw in the Windows Remote Access service implementation where the system fails to properly validate authentication tokens or session management during remote access connection establishment. This allows an attacker to manipulate the authentication flow and bypass normal privilege checks that should prevent non-administrative users from accessing system-level resources. The vulnerability is particularly concerning because it operates at the kernel level within the Windows operating system, making it extremely difficult to detect and mitigate. According to CWE-269, this represents a privilege escalation vulnerability where the system fails to properly enforce access controls, and the flaw aligns with ATT&CK technique T1068 which describes the use of local privilege escalation techniques.
The operational impact of CVE-2020-17032 extends beyond simple privilege escalation as it provides attackers with complete system control capabilities including the ability to install malicious software, modify system configurations, access sensitive data, and potentially establish persistence mechanisms. Attackers can leverage this vulnerability to move laterally within networks where Windows systems are present, as the elevated privileges gained through this vulnerability can be used to access other network resources that would otherwise be protected by standard user access controls. The vulnerability affects multiple Windows versions including Windows 10, Windows Server 2016, and Windows Server 2019, making it a widespread concern for enterprise environments that rely on these operating systems for remote access capabilities.
Mitigation strategies for this vulnerability should include immediate deployment of Microsoft security patches as provided through Windows Update or Microsoft Security Response Center. Organizations should also implement network segmentation to limit access to systems running remote access services and disable unnecessary remote access features when possible. Security monitoring should be enhanced to detect unusual authentication patterns or privilege escalation attempts within the remote access subsystem. The vulnerability demonstrates the importance of maintaining up-to-date security patches and proper access control configurations, as outlined in the NIST Cybersecurity Framework and ISO 27001 standards. Additionally, implementing principle of least privilege access controls and regular security assessments can help reduce the attack surface and prevent exploitation of similar vulnerabilities in the remote access subsystem.