CVE-2020-1158 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-2020-1156, CVE-2020-1157, 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-2020-1158 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 system level access. This vulnerability specifically manifests when the Windows Runtime component fails to properly handle objects stored in memory, creating a pathway for unauthorized code execution with elevated privileges. The flaw exists within the core Windows Runtime infrastructure that manages application execution and system interactions, making it a fundamental weakness in the operating system's security architecture. Security researchers have classified this issue as a privilege escalation vulnerability that could be exploited by attackers to gain complete control over affected systems.
The technical nature of this vulnerability stems from improper memory object handling within the Windows Runtime environment, which operates as a middleware layer between applications and the underlying operating system. When Windows Runtime processes objects in memory, it fails to validate or properly sanitize certain memory references, allowing attackers to manipulate these objects in ways that bypass normal security checks. This memory handling flaw typically involves improper validation of object pointers or references that could be manipulated through crafted input or memory corruption techniques. The vulnerability is particularly concerning because Windows Runtime is integral to how applications interact with system resources, making it a prime target for exploitation. According to CWE classification, this vulnerability aligns with CWE-125, which describes out-of-bounds read conditions, and CWE-787, which covers out-of-bounds write conditions, both of which are common in memory corruption scenarios.
The operational impact of CVE-2020-1158 extends far beyond simple privilege escalation, as it enables attackers to execute arbitrary code with system-level privileges, potentially leading to complete system compromise. Once an attacker successfully exploits this vulnerability, they can install malware, modify system files, create new user accounts, access sensitive data, and establish persistent backdoors within the compromised system. The vulnerability affects multiple Windows versions including Windows 10, Windows Server 2016, and Windows Server 2019, making it a widespread concern across enterprise and consumer environments. Organizations running affected systems face significant risk of data breaches, system takeovers, and potential lateral movement within their networks. The vulnerability's exploitation typically requires minimal user interaction, often allowing for automated attacks through drive-by downloads or malicious websites, which significantly increases its threat potential.
Mitigation strategies for CVE-2020-1158 primarily focus on applying Microsoft's security patches and updates as soon as they become available, which address the underlying memory handling flaws in the Windows Runtime component. System administrators should prioritize patch deployment across all affected Windows systems, particularly those running server environments or handling sensitive data. Additional protective measures include implementing network segmentation, deploying endpoint protection solutions, and monitoring for suspicious system activity that might indicate exploitation attempts. The vulnerability's characteristics align with ATT&CK technique T1068, which covers exploit for privilege escalation, and T1059, which covers command and scripting interpreter, making it a target for comprehensive security monitoring. Organizations should also consider implementing application whitelisting policies and reducing the attack surface by disabling unnecessary Windows Runtime features. Regular security assessments and vulnerability scanning should be conducted to identify systems that may not have received the necessary patches, as this vulnerability can remain exploitable for extended periods if left unaddressed.