CVE-2020-1077 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-2020-1086, CVE-2020-1090, CVE-2020-1125, CVE-2020-1139, 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 represents a critical security flaw within Microsoft's Windows operating system that allows unauthorized users to escalate their privileges from standard user level to administrative rights. This vulnerability specifically affects how the Windows Runtime environment manages object memory handling, creating potential attack vectors that could be exploited by malicious actors to gain elevated system access. The flaw exists in the core runtime components that facilitate communication between applications and system services, making it particularly dangerous as it operates at a fundamental level of the operating system architecture. Security researchers identified this issue as part of Microsoft's regular vulnerability assessment process, highlighting its potential to undermine the security model of Windows systems.
The technical root cause of this vulnerability stems from improper memory management within the Windows Runtime environment, which is responsible for handling objects and their lifecycle within the system. When the Windows Runtime processes certain objects in memory, it fails to properly validate or sanitize the memory references, allowing for potential memory corruption or manipulation. This memory handling flaw can be exploited through crafted inputs or malicious code that manipulates how objects are created, accessed, or destroyed within the runtime environment. The vulnerability specifically manifests when the system attempts to process objects that have been improperly initialized or when memory addresses are not adequately validated before use. This type of memory handling issue falls under the CWE-119 weakness category, which encompasses weaknesses related to improper handling of memory buffers and object references.
The operational impact of this vulnerability extends beyond simple privilege escalation, as it can potentially enable attackers to execute arbitrary code with elevated privileges, access restricted system resources, and compromise the integrity of the entire operating system. An attacker who successfully exploits this vulnerability could gain full administrative control over the affected system, allowing them to install malicious software, modify system configurations, access sensitive data, or even establish persistent backdoors. The vulnerability affects multiple Windows versions including Windows 10, Windows Server 2016, and Windows Server 2019, making it a widespread concern for enterprise environments. The attack surface is particularly broad as the Windows Runtime is utilized by numerous system components and applications, increasing the likelihood that an exploit could be successfully delivered through various attack vectors including malicious software, web-based attacks, or social engineering campaigns.
Microsoft addressed this vulnerability through their regular security update cycle, releasing patches that correct the memory handling issues within the Windows Runtime environment. Organizations should prioritize applying these security updates immediately to protect their systems from exploitation attempts. The mitigation strategy involves implementing proper patch management procedures and ensuring all Windows systems receive the latest security updates. Additional defensive measures include network segmentation, application whitelisting, and monitoring for suspicious privilege escalation attempts. Security professionals should also consider implementing behavioral monitoring solutions that can detect anomalous patterns consistent with privilege escalation attacks. The vulnerability aligns with several ATT&CK techniques including privilege escalation through exploitation of software vulnerabilities and defense evasion through modification of system components. Organizations should conduct thorough vulnerability assessments to identify systems that may be impacted and establish incident response procedures to handle potential exploitation attempts.