CVE-2020-1139 in Windows
Summary
by MITRE
An elevation of privilege vulnerability exists when the Windows Runtime improperly handles objects in memory, aka 'Windows Runtime Elevation of Privilege Vulnerability'. This CVE ID is unique from CVE-2020-1077, CVE-2020-1086, CVE-2020-1090, CVE-2020-1125, CVE-2020-1149, CVE-2020-1151, CVE-2020-1155, CVE-2020-1156, CVE-2020-1157, CVE-2020-1158, CVE-2020-1164.
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Analysis
by VulDB Data Team • 10/17/2020
The Windows Runtime Elevation of Privilege Vulnerability identified as CVE-2020-1139 represents a critical security flaw within the Windows operating system's runtime environment that allows attackers to escalate their privileges from standard user level to administrative access. This vulnerability specifically targets the improper handling of objects in memory by the Windows Runtime component, which serves as a foundational framework for modern Windows applications and system services. The flaw exists in how the runtime manages memory objects during application execution, creating potential pathways for malicious code to manipulate system resources and gain unauthorized administrative privileges.
This vulnerability falls under the Common Weakness Enumeration category CWE-264, which addresses permissions, privileges, and access control weaknesses within software systems. The technical implementation flaw occurs when Windows Runtime components fail to properly validate or sanitize memory objects during processing, potentially allowing attackers to craft malicious inputs that exploit memory management gaps. The vulnerability demonstrates characteristics consistent with memory corruption issues where improper object handling can lead to arbitrary code execution and privilege escalation. Attackers can leverage this weakness by manipulating specific runtime behaviors to bypass standard security controls and elevate their execution context.
The operational impact of CVE-2020-1139 extends beyond simple privilege escalation, as it can enable attackers to gain full administrative control over affected systems. This capability allows adversaries to install malicious software, modify system configurations, access sensitive data, and potentially establish persistent backdoors within the compromised environment. The vulnerability affects multiple Windows versions including Windows 10, Windows Server 2016, and Windows Server 2019, making it a widespread concern for enterprise environments where these operating systems are deployed. Organizations running affected systems face significant risk of data breaches, system compromise, and potential lateral movement within their networks.
Mitigation strategies for this vulnerability primarily focus on applying Microsoft's security patches and updates as soon as they become available through Windows Update or Microsoft Update Catalog. System administrators should prioritize patch deployment across all affected Windows systems, particularly those with elevated privileges or sensitive data access. Additional protective measures include implementing application whitelisting policies, configuring enhanced security settings within Windows Runtime components, and monitoring for suspicious privilege escalation activities. The vulnerability aligns with several ATT&CK techniques including privilege escalation through exploitation of software vulnerabilities and persistence mechanisms. Organizations should also consider network segmentation and access control measures to limit potential lateral movement if a system becomes compromised, while maintaining comprehensive monitoring to detect anomalous behavior indicative of privilege escalation attempts.