CVE-2019-1470 in Windows
Summary
by MITRE
An information disclosure vulnerability exists when Windows Hyper-V on a host operating system fails to properly validate input from an authenticated user on a guest operating system, aka 'Windows Hyper-V Information Disclosure Vulnerability'.
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Analysis
by VulDB Data Team • 03/09/2024
The vulnerability identified as CVE-2019-1470 represents a critical information disclosure weakness within Microsoft Windows Hyper-V virtualization infrastructure. This flaw manifests when the host operating system fails to adequately validate input parameters originating from authenticated guest operating systems, creating a potential pathway for unauthorized data exposure. The vulnerability specifically affects systems running Windows Hyper-V and impacts the isolation mechanisms that separate virtual machine environments from the host system. From a cybersecurity perspective, this represents a significant concern as it undermines the fundamental security principle of virtual machine isolation that is essential for multi-tenant cloud environments and enterprise virtualization deployments.
The technical implementation of this vulnerability stems from insufficient input validation mechanisms within the Hyper-V hypervisor components that process communications between host and guest operating systems. When a guest operating system submits specific input parameters to the host hypervisor, the validation routines fail to properly sanitize or verify these inputs before processing them. This improper validation allows malicious actors within a compromised guest environment to potentially extract sensitive information from the host system or other virtual machines running on the same physical hardware. The flaw operates at the hypervisor level, making it particularly dangerous as it can bypass traditional operating system security controls and network segmentation measures. This vulnerability aligns with CWE-20, which describes improper input validation, and represents a classic case of privilege escalation through insecure inter-vm communication channels.
The operational impact of CVE-2019-1470 extends beyond simple information disclosure, as it can enable attackers to gather sensitive system information that may facilitate further exploitation attempts. An attacker who successfully exploits this vulnerability could potentially access memory dumps, configuration data, or other confidential information that should remain isolated within the host environment. This information could include credentials, system configurations, or other sensitive data that could be leveraged for lateral movement within a network. The vulnerability is particularly concerning in cloud computing environments where multiple customers share the same physical infrastructure, as it could allow one tenant to potentially access data from another tenant's virtual machines. Organizations relying on Hyper-V for their virtualization infrastructure face significant risk if this vulnerability remains unpatched, as it directly compromises the security boundaries that protect against cross-tenant data leakage and host system compromise.
Mitigation strategies for CVE-2019-1470 primarily focus on applying Microsoft's security patches and updates as soon as they become available. Organizations should prioritize patch management processes to ensure all Hyper-V host systems receive the necessary updates that address the input validation deficiencies. Additionally, implementing network segmentation and access controls can help limit the potential impact of exploitation attempts, though these measures do not fully address the underlying vulnerability. Security monitoring should include detection of anomalous communication patterns between guest and host systems that might indicate exploitation attempts. The vulnerability demonstrates the importance of maintaining up-to-date virtualization security controls and highlights the need for continuous security assessments of hypervisor components. From an ATT&CK framework perspective, this vulnerability maps to techniques involving privilege escalation and information gathering, making it a critical target for both defensive measures and threat hunting activities. Organizations should also consider implementing additional security controls such as hypervisor hardening, regular security audits, and maintaining detailed logging of virtual machine activities to detect potential exploitation attempts.