CVE-2020-0772 in Windows
Summary
by MITRE
An elevation of privilege vulnerability exists when Windows Error Reporting improperly handles memory.To exploit this vulnerability, an attacker would first have to gain execution on the victim system, aka 'Windows Error Reporting Elevation of Privilege Vulnerability'. This CVE ID is unique from CVE-2020-0806.
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Analysis
by VulDB Data Team • 04/10/2024
The vulnerability identified as CVE-2020-0772 represents a critical elevation of privilege flaw within Windows Error Reporting component, categorized under CWE-264 in the Common Weakness Enumeration framework. This vulnerability stems from improper memory handling practices within the Windows Error Reporting service, which is designed to collect and report application crash information to Microsoft. The flaw exists in how the system processes memory structures during error reporting operations, creating a potential pathway for malicious actors to escalate their privileges from standard user level to SYSTEM level access. The vulnerability is particularly concerning because it requires only initial execution on the target system to exploit, making it a prime target for attackers who have already gained a foothold through other means such as phishing attacks or drive-by downloads.
The technical exploitation of this vulnerability occurs through manipulation of memory structures within the Windows Error Reporting service, which operates with elevated privileges to properly handle system crashes and application errors. Attackers can craft malicious error reports or trigger specific error conditions that cause the service to improperly handle memory allocations, leading to memory corruption that can be leveraged for privilege escalation. This type of vulnerability falls under the ATT&CK technique T1068, which describes 'Exploitation for Privilege Escalation' and specifically targets Windows Error Reporting as a means to achieve SYSTEM-level access. The vulnerability is particularly dangerous because Windows Error Reporting runs with high privileges and has access to system resources that normal user processes cannot directly access, making it an attractive target for attackers seeking to establish persistent system-level control.
The operational impact of CVE-2020-0772 extends beyond simple privilege escalation, as successful exploitation can provide attackers with complete system control and access to sensitive data. Once escalated to SYSTEM level, attackers can modify system files, install persistent backdoors, access encrypted data, and perform other malicious activities that would otherwise be restricted to authorized system administrators. The vulnerability affects multiple Windows versions including Windows 10, Windows Server 2016, and Windows Server 2019, making it a widespread concern for enterprise environments. Organizations that have not applied the relevant security updates face significant risk of compromise, as the vulnerability can be exploited through various attack vectors including malicious software installation, web-based attacks, or social engineering campaigns that lead to initial system compromise.
Mitigation strategies for CVE-2020-0772 primarily focus on applying Microsoft security patches as soon as they become available, which address the memory handling flaws in the Windows Error Reporting service. System administrators should implement comprehensive patch management procedures to ensure all systems receive security updates promptly. Additional defensive measures include implementing application whitelisting policies to restrict execution of unauthorized code, monitoring for unusual error reporting activities that might indicate exploitation attempts, and applying the principle of least privilege to limit user account permissions. Network segmentation and intrusion detection systems can help identify potential exploitation attempts by monitoring for abnormal system behavior or unauthorized privilege escalation activities. The vulnerability also highlights the importance of maintaining current security hygiene practices and regularly reviewing system configurations to prevent attackers from leveraging similar memory handling flaws in other Windows services. Organizations should also consider implementing endpoint detection and response solutions that can identify and block malicious exploitation attempts targeting Windows Error Reporting and similar system components.