CVE-2020-1358 in Windows
Summary
by MITRE
An information disclosure vulnerability exists when the Windows Resource Policy component improperly handles memory.To exploit this vulnerability, an attacker would first have to gain execution on the victim system, aka 'Windows Resource Policy Information Disclosure Vulnerability'.
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Analysis
by VulDB Data Team • 10/30/2020
The Windows Resource Policy component vulnerability identified as CVE-2020-1358 represents a critical information disclosure flaw that manifests when the system fails to properly handle memory operations within the resource policy framework. This vulnerability resides in the Windows operating system's resource management subsystem, specifically affecting how the system processes and manages memory allocations related to resource policy enforcement. The flaw occurs during normal operation when the component encounters certain memory handling scenarios that trigger improper memory state management, leading to potential information leakage. According to the Common Weakness Enumeration catalog, this vulnerability maps to CWE-200, which describes insufficient output sanitization or improper handling of sensitive information during processing. The vulnerability is particularly concerning because it operates at the core of Windows resource management, where the system maintains critical policy information and resource allocation data that could be accessed by unauthorized parties.
The technical exploitation of this vulnerability requires an attacker to first achieve code execution on the target system, as the flaw does not permit remote code execution but rather information disclosure through memory handling errors. Once execution is achieved, the attacker can leverage the improper memory handling to extract sensitive information from the Windows Resource Policy component's memory space. The vulnerability stems from inadequate memory boundary checking and improper memory deallocation processes within the resource policy enforcement mechanisms. This allows for memory content leakage that could include policy configurations, resource allocation details, or other sensitive operational data. The ATT&CK framework categorizes this as a privilege escalation technique through information disclosure, where an attacker with initial access can expand their knowledge of the system's internal workings to potentially identify further attack vectors. The memory handling error specifically affects how the system manages allocated memory blocks when processing resource policy requests, creating opportunities for information leakage through memory corruption patterns.
The operational impact of CVE-2020-1358 extends beyond simple information disclosure, as the leaked information could provide attackers with valuable insights into the target system's resource management policies and operational configurations. This intelligence could be used to refine subsequent attacks, potentially enabling more sophisticated exploitation techniques or targeting specific system components. The vulnerability affects multiple Windows versions including Windows 10, Windows Server 2016, and Windows Server 2019, making it a widespread concern across enterprise environments. Organizations running these affected systems face potential exposure to attackers who can leverage this information to plan more targeted attacks against their resource management infrastructure. The impact is particularly severe in environments where resource policy enforcement is critical to security controls, as the leaked information could reveal operational details that compromise the effectiveness of security mechanisms. The vulnerability's exploitation requires local system access, but this limitation does not diminish its severity given that local access often represents a foothold for more extensive compromise within network environments.
Mitigation strategies for CVE-2020-1358 should focus on both immediate patch deployment and enhanced monitoring of system memory operations. Microsoft released security updates that address the memory handling issues within the Windows Resource Policy component, and organizations should prioritize applying these patches across all affected systems. Additionally, implementing enhanced memory monitoring and anomaly detection systems can help identify potential exploitation attempts by monitoring for unusual memory access patterns or information leakage indicators. Security teams should also consider implementing network segmentation and access controls to limit potential attack surfaces where local execution might occur. The vulnerability's classification under CWE-200 emphasizes the need for comprehensive information protection measures, including regular security assessments of resource policy configurations and monitoring for unauthorized access attempts. Organizations should conduct vulnerability assessments to identify systems running affected Windows versions and implement layered security approaches that reduce the attack surface and limit the potential impact of information disclosure vulnerabilities. The ATT&CK framework recommends implementing process monitoring and memory integrity checks as part of defensive strategies against this type of information disclosure threat.