CVE-2020-1197 in Windows
Summary
by MITRE
An elevation of privilege vulnerability exists when Windows Error Reporting manager improperly handles a process crash, aka 'Windows Error Reporting Manager Elevation of Privilege Vulnerability'.
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Analysis
by VulDB Data Team • 10/23/2020
The vulnerability identified as CVE-2020-1197 represents a critical elevation of privilege flaw within the Windows Error Reporting manager component of Microsoft Windows operating systems. This vulnerability stems from improper handling of process crashes within the error reporting framework, creating a pathway for malicious actors to escalate their privileges from standard user level to system level access. The Windows Error Reporting manager is designed to collect and transmit crash information to Microsoft for diagnostic purposes, but this particular flaw allows attackers to exploit the crash handling mechanism to execute arbitrary code with elevated privileges. 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.
The technical root cause of this vulnerability lies in the insufficient validation and handling of crash events within the Windows Error Reporting subsystem. When a process crashes, the error reporting manager typically collects crash data and forwards it to Microsoft for analysis. However, the vulnerability occurs during the processing of these crash reports, where the system fails to properly validate the integrity of crash data or enforce appropriate access controls. This improper handling creates a condition where malicious code can manipulate the crash reporting process to execute with elevated privileges, effectively bypassing the standard user privilege boundaries. The flaw specifically relates to how the system manages the transition from user-mode to kernel-mode execution during crash processing, allowing for privilege escalation through crafted crash scenarios. This type of vulnerability is categorized under CWE-264, which addresses permissions, privileges, and access controls, and aligns with ATT&CK technique T1068 which covers 'Exploitation for Privilege Escalation'.
The operational impact of CVE-2020-1197 is severe and far-reaching, as successful exploitation can result in complete system compromise. An attacker who successfully exploits this vulnerability gains system-level privileges, enabling them to install malware, modify system files, create new user accounts, disable security features, and access sensitive data across the entire system. The vulnerability is particularly dangerous because it can be exploited remotely through various attack vectors including malicious software downloads, web-based attacks, or even through compromised applications that trigger crashes within the Windows Error Reporting framework. The attack surface is broad since Windows Error Reporting is active across all Windows installations and processes, making it a prime target for exploitation. Organizations running affected Windows versions are at significant risk, especially those with less sophisticated security monitoring capabilities that may not detect the subtle indicators of privilege escalation attacks.
Mitigation strategies for CVE-2020-1197 should focus on immediate patch management and system hardening measures. Microsoft has released security updates addressing this vulnerability through the regular monthly security updates, and organizations should prioritize installing these patches as soon as possible. System administrators should also implement additional security controls including restricting access to the Windows Error Reporting service, monitoring for unusual crash reporting activity, and employing behavioral monitoring solutions to detect privilege escalation attempts. Network segmentation and application whitelisting can help limit the attack surface by preventing unauthorized applications from triggering the vulnerable error reporting mechanisms. Additionally, organizations should consider implementing advanced threat detection solutions that can identify anomalous behavior patterns associated with privilege escalation attempts, as traditional signature-based detection may not be sufficient to identify exploitation of this vulnerability. The mitigation approach should also include regular security assessments and vulnerability scanning to identify systems that may not have received the necessary updates, while maintaining comprehensive logging of error reporting activities to aid in forensic analysis should an attack occur.