CVE-2020-1305 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'.
Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.
Analysis
by VulDB Data Team • 10/23/2020
The vulnerability identified as CVE-2020-1305 represents a critical elevation of privilege flaw within the Windows State Repository Service component of Microsoft Windows operating systems. This vulnerability stems from improper handling of objects in memory, creating a pathway for malicious actors to escalate their privileges from standard user level to SYSTEM level access. The Windows State Repository Service is responsible for managing application state information and maintaining consistency across various system components, making it a critical element in the Windows operating system architecture. When objects are improperly managed in memory, particularly during the processing of state information, the service fails to validate or sanitize input data appropriately, leading to potential code execution and privilege escalation opportunities.
From a technical perspective, the vulnerability manifests when the Windows State Repository Service processes memory objects without adequate validation mechanisms. This flaw allows attackers to craft malicious input that, when processed by the service, results in unauthorized privilege escalation. The underlying issue aligns with CWE-121, which describes stack-based buffer overflow conditions, and CWE-122, which covers heap-based buffer overflow conditions, as the improper memory handling creates opportunities for attackers to manipulate memory contents. The service's failure to properly validate object boundaries and memory integrity creates a vector for attackers to execute arbitrary code with elevated privileges. This type of vulnerability is particularly dangerous because it operates within the system's core infrastructure rather than in user-space applications, making detection and prevention more challenging.
The operational impact of CVE-2020-1305 extends beyond simple privilege escalation, as it provides attackers with a persistent foothold within the Windows environment. Once an attacker successfully exploits this vulnerability, they can gain SYSTEM-level access, enabling them to perform actions such as installing malicious software, modifying system files, accessing sensitive data, and potentially establishing persistence mechanisms. The vulnerability affects multiple Windows versions including Windows 10, Windows Server 2016, and Windows Server 2019, making it a widespread concern across enterprise environments. From an adversary perspective, this vulnerability maps to ATT&CK technique T1068, which covers 'Exploitation for Privilege Escalation,' and T1547.001, which addresses 'Registry Run Keys / Startup Folder' for maintaining persistence. The impact is particularly severe in enterprise environments where attackers could leverage this vulnerability to move laterally within networks, access critical infrastructure, and compromise sensitive organizational data.
Mitigation strategies for CVE-2020-1305 should prioritize immediate patch deployment through Microsoft's regular security updates, as the vulnerability has been addressed in Microsoft security bulletin MS19-093. Organizations should implement comprehensive monitoring for suspicious activities related to the Windows State Repository Service and ensure proper access controls are in place. Network segmentation and principle of least privilege should be enforced to limit the potential impact of successful exploitation. Additionally, implementing application whitelisting policies and maintaining updated antivirus signatures can provide additional defense layers. Security teams should conduct regular vulnerability assessments focusing on Windows services and ensure that all systems are maintained with the latest security patches. The vulnerability demonstrates the importance of proper memory management in system services and highlights the need for robust input validation mechanisms in core operating system components, aligning with security best practices outlined in NIST SP 800-128 and ISO/IEC 27001 standards for secure system development and maintenance.