CVE-2022-24539 in Windows
Summary
by MITRE • 04/15/2022
Windows Hyper-V Shared Virtual Hard Disks Information Disclosure Vulnerability. This CVE ID is unique from CVE-2022-24490, CVE-2022-26783, CVE-2022-26785.
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Analysis
by VulDB Data Team • 04/17/2022
The Windows Hyper-V Shared Virtual Hard Disks Information Disclosure Vulnerability represents a critical security flaw within Microsoft's virtualization platform that affects systems running Hyper-V hypervisor. This vulnerability specifically targets the shared virtual hard disk functionality that enables multiple virtual machines to access the same storage resource concurrently. The issue arises from insufficient validation mechanisms in the Hyper-V storage subsystem when processing shared virtual disk operations, creating potential pathways for unauthorized information disclosure. Unlike related vulnerabilities such as CVE-2022-24490, CVE-2022-26783, and CVE-2022-26785 which address different aspects of Hyper-V security, this particular flaw focuses specifically on the information disclosure aspects of shared virtual disk implementations.
The technical root cause of this vulnerability stems from improper access control and validation within the Hyper-V virtual storage manager component. When multiple virtual machines attempt to access shared virtual hard disks simultaneously, the system fails to adequately enforce isolation boundaries between different virtual environments. This weakness allows an attacker with appropriate privileges within a guest virtual machine to potentially extract sensitive information from other virtual machines sharing the same storage resources. The flaw manifests during normal shared disk operations where the hypervisor does not properly sanitize or validate data access requests, leading to information leakage that could include virtual machine configuration details, storage metadata, or potentially sensitive data residing on shared volumes. This vulnerability aligns with CWE-200, which categorizes information exposure issues, and represents a classic case of insufficient access control mechanisms in virtualized environments.
The operational impact of this vulnerability extends beyond simple information disclosure, as it can enable attackers to gather intelligence about the underlying virtual infrastructure and potentially facilitate more sophisticated attacks. An attacker could exploit this vulnerability to understand the structure of shared storage resources, identify other virtual machines running on the same physical host, and potentially correlate this information with other attack vectors. The vulnerability is particularly concerning in multi-tenant environments where isolation between different customers' virtual machines is paramount. Attackers could leverage this information to plan targeted attacks against specific virtual machines or to understand the broader virtualization landscape. This weakness can be categorized under ATT&CK technique T1082, which involves discovering information about the system environment, and T1566, which covers credential access through various attack vectors. The impact is exacerbated in cloud environments where shared infrastructure is common and proper isolation mechanisms are critical for maintaining security boundaries.
Mitigation strategies for this vulnerability should focus on implementing proper access controls and ensuring that virtualization environments maintain adequate isolation between different virtual machines. Microsoft has released security updates that address this specific vulnerability through enhanced validation mechanisms in the Hyper-V storage subsystem. Organizations should immediately apply the relevant security patches and ensure that virtual machines are configured with appropriate access controls to limit the potential impact of information disclosure. Network segmentation and monitoring should be implemented to detect anomalous access patterns that might indicate exploitation attempts. Additionally, virtual machine administrators should review shared disk configurations and ensure that only authorized virtual machines have access to shared storage resources. The vulnerability highlights the importance of maintaining up-to-date security patches in virtualized environments and demonstrates the critical need for proper isolation mechanisms when multiple virtual machines share common storage resources. Regular security assessments of virtualization environments should include testing for similar information disclosure vulnerabilities that could compromise the integrity of shared storage implementations.