CVE-2020-1399 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-2020-1249, CVE-2020-1353, CVE-2020-1370, CVE-2020-1404, CVE-2020-1413, CVE-2020-1414, CVE-2020-1415, CVE-2020-1422.
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Analysis
by VulDB Data Team • 10/30/2020
The Windows Runtime elevation of privilege vulnerability represents a critical security flaw in Microsoft's Windows operating system that allows attackers to escalate their privileges from standard user level to system level. This vulnerability specifically manifests when the Windows Runtime component fails to properly handle objects in memory, creating opportunities for malicious actors to exploit memory management flaws. The issue affects multiple versions of Windows including Windows 10, Windows Server 2016, and Windows Server 2019, making it a widespread concern across enterprise environments. The vulnerability is particularly dangerous because it leverages the core Windows Runtime infrastructure that handles application execution and system interactions, providing attackers with a powerful vector for privilege escalation.
From a technical perspective, the vulnerability stems from improper memory object handling within the Windows Runtime environment. When applications interact with Windows Runtime components, the system allocates and manages memory objects that are supposed to be properly isolated and validated. However, the flaw allows for memory corruption scenarios where attackers can manipulate these objects to execute arbitrary code with elevated privileges. This typically involves exploiting heap-based memory management issues where the runtime does not properly validate object boundaries or memory access patterns. The vulnerability operates at a low level within the operating system's core components, making it particularly challenging to detect and prevent through conventional security measures.
The operational impact of this vulnerability extends beyond simple privilege escalation, as it can enable attackers to gain complete system control and persistence within affected environments. Once an attacker successfully exploits this vulnerability, they can execute malicious code with system-level privileges, potentially leading to data theft, system compromise, and lateral movement throughout the network. The attack surface is particularly concerning in enterprise environments where multiple users interact with Windows systems, as a single compromised account could lead to full system compromise. Organizations that rely heavily on Windows-based infrastructure face significant risk, especially those with limited security monitoring capabilities that might not detect such subtle privilege escalation attacks.
Mitigation strategies for this vulnerability require immediate patching of affected systems, as Microsoft has released security updates specifically addressing this issue. Organizations should prioritize deployment of the relevant security patches across all affected Windows versions, particularly focusing on systems that handle sensitive data or serve as network entry points. Network segmentation and privilege reduction measures can help limit the potential impact of successful exploitation, while enhanced monitoring and logging of privilege-related activities can aid in detecting attempted exploitation. Security professionals should also consider implementing application whitelisting policies and maintaining up-to-date intrusion detection systems to identify anomalous behavior that might indicate exploitation attempts. The vulnerability aligns with CWE-121, which describes heap-based buffer overflow conditions, and maps to ATT&CK technique T1068, which covers local privilege escalation through system binary manipulation, highlighting the multi-layered nature of the security implications and the need for comprehensive defensive strategies across multiple security domains.