CVE-2020-1124 in Windows
Summary
by MITRE
An elevation of privilege vulnerability exists when the Windows State Repository Service improperly handles objects in memory, aka 'Windows State Repository Service Elevation of Privilege Vulnerability'. This CVE ID is unique from CVE-2020-1131, CVE-2020-1134, CVE-2020-1144, CVE-2020-1184, CVE-2020-1185, CVE-2020-1186, CVE-2020-1187, CVE-2020-1188, CVE-2020-1189, CVE-2020-1190, CVE-2020-1191.
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Analysis
by VulDB Data Team • 10/17/2020
The vulnerability identified as CVE-2020-1124 represents a critical elevation of privilege flaw within the Windows State Repository Service component of Microsoft Windows operating systems. This service is responsible for managing and maintaining the state information of various Windows components and applications, making it a crucial element in system stability and security. The vulnerability stems from improper handling of objects in memory, which creates a potential attack vector for malicious actors seeking to escalate their privileges within the affected systems. The Windows State Repository Service operates with elevated privileges to perform its functions, making any memory handling flaws particularly dangerous as they could be exploited to gain unauthorized access to system resources.
The technical exploitation of this vulnerability occurs through memory corruption techniques that allow attackers to manipulate how the Windows State Repository Service processes objects in memory. When the service receives or processes certain data structures, it fails to properly validate or handle the memory objects, potentially leading to arbitrary code execution or privilege escalation. This type of flaw falls under the CWE-125 weakness category, which specifically addresses out-of-bounds read conditions that can result in information disclosure, system crashes, or privilege escalation. The vulnerability's impact is amplified by the fact that the Windows State Repository Service runs with high privileges, meaning successful exploitation could provide attackers with SYSTEM-level access to the compromised system. The flaw demonstrates characteristics consistent with memory safety issues that are commonly exploited in privilege escalation attacks, often following patterns seen in heap-based buffer overflows or use-after-free conditions.
From an operational perspective, this vulnerability presents significant risks to enterprise environments where Windows systems are deployed. The attack surface is broad as the Windows State Repository Service is integral to many Windows functionalities, including application compatibility layers, system state management, and component interactions. Security teams must consider that exploitation of this vulnerability could enable attackers to bypass standard authentication mechanisms and gain full control over affected systems. The vulnerability's relationship to the ATT&CK framework places it within the privilege escalation technique category, specifically targeting the 'Windows Admin Shares' and 'Service Execution' tactics. Organizations running affected Windows versions are particularly at risk, as the vulnerability can be exploited remotely or locally depending on the attack vector used, potentially allowing attackers to establish persistent access and move laterally within networks.
Mitigation strategies for CVE-2020-1124 should focus on immediate patch management and system hardening measures. Microsoft released security updates in the May 2020 Patch Tuesday release that address this vulnerability through proper memory handling and validation mechanisms. Organizations should prioritize deployment of these patches across their environments, particularly in critical infrastructure and high-value targets. Additional defensive measures include implementing application control policies, monitoring for unusual service behavior, and conducting regular security assessments of Windows systems. Network segmentation and principle of least privilege implementations can help limit the potential impact if exploitation occurs. Security monitoring should focus on detecting anomalous memory access patterns or service interactions that might indicate exploitation attempts. The vulnerability also highlights the importance of regular security assessments and vulnerability scanning to identify similar memory handling flaws in other Windows services and components, as this type of issue often indicates broader architectural weaknesses in memory management practices.