CVE-2020-1156 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-2020-1139, CVE-2020-1149, CVE-2020-1151, CVE-2020-1155, 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 represents a critical security flaw within the Windows operating system's runtime environment that allows malicious actors to escalate their privileges from standard user level to administrative rights. This vulnerability specifically manifests when the Windows Runtime component fails to properly manage memory objects, creating exploitable conditions that bypass normal security boundaries. The issue affects multiple Windows versions including Windows 10, Windows Server 2016, and Windows Server 2019, making it a widespread concern across enterprise and consumer environments. From a cybersecurity perspective, this vulnerability falls under the category of privilege escalation flaws that can fundamentally compromise system integrity and enable persistent access to sensitive resources.
The technical implementation of this vulnerability stems from improper memory handling within the Windows Runtime subsystem, which is responsible for managing application components and system services. When applications or system processes interact with Windows Runtime objects, the memory management routines fail to validate object boundaries and access controls properly. This memory corruption issue creates opportunities for attackers to manipulate object references and execute arbitrary code with elevated privileges. The vulnerability can be exploited through various attack vectors including malicious applications, compromised software installations, or social engineering campaigns that trick users into executing malicious code. The flaw operates at the kernel level, making it particularly dangerous as it can bypass traditional user-mode security controls and exploit mechanisms.
The operational impact of this vulnerability extends beyond simple privilege escalation to encompass potential full system compromise and data exfiltration capabilities. An attacker who successfully exploits this vulnerability can gain administrative access to affected systems, enabling them to install malware, modify system files, create backdoor accounts, and access all user data and system resources. The vulnerability's persistence mechanism allows attackers to maintain access even after system reboots, creating long-term security risks for organizations. Additionally, the broad scope of affected Windows versions means that both desktop and server environments face similar exposure, with enterprise networks particularly vulnerable due to the interconnected nature of modern computing infrastructures. This vulnerability directly aligns with attack patterns documented in the MITRE ATT&CK framework under privilege escalation techniques, specifically targeting the 'Windows Runtime' and 'Exploitation for Privilege Escalation' tactics.
Organizations should implement immediate mitigations including applying Microsoft security patches and updates released through Windows Update or Microsoft Update Catalog, as these patches address the underlying memory handling flaws in the Windows Runtime component. Network segmentation and access control measures should be strengthened to limit potential lateral movement if exploitation occurs, while endpoint detection and response solutions should be configured to monitor for anomalous Windows Runtime behavior and privilege escalation attempts. System administrators should also conduct thorough vulnerability assessments to identify potentially compromised systems and implement monitoring for suspicious process creation patterns related to Windows Runtime components. The vulnerability's classification as a CWE-121 (Stack-based Buffer Overflow) and CWE-122 (Heap-based Buffer Overflow) indicates the memory corruption nature of the flaw, making it essential to focus on memory safety controls and runtime protections. Regular security awareness training should emphasize the importance of avoiding untrusted software installations and maintaining current system patches to prevent exploitation of this and similar vulnerabilities.