CVE-2024-43567 in Windows
Summary
by MITRE • 10/08/2024
Windows Hyper-V Denial of Service Vulnerability
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Analysis
by VulDB Data Team • 06/15/2026
This vulnerability resides within the Windows Hyper-V hypervisor component, specifically affecting the virtualization subsystem that enables multiple operating systems to run simultaneously on a single physical machine. The flaw manifests as a denial of service condition that can be exploited by malicious actors to disrupt the normal operation of virtualized environments. The vulnerability stems from improper handling of certain memory management operations within the hypervisor's virtual machine communication interface, creating a potential attack vector that allows unauthorized users to cause system instability or complete service interruption. The technical implementation involves a race condition or memory corruption issue that occurs when processing specific virtual machine requests, particularly those involving memory allocation and deallocation sequences. This weakness affects various Windows Server versions including 2016, 2019, and 2022, as well as Windows 10 and 11 versions that include Hyper-V functionality. The vulnerability aligns with CWE-121, which addresses buffer overflow conditions, and CWE-362, which covers race conditions in concurrent programming environments. From an operational perspective, this vulnerability presents a significant risk to enterprise environments that rely heavily on virtualization technologies, as it can lead to complete service disruption of virtual machines and potentially impact the underlying physical host system. Attackers can exploit this weakness by crafting malicious virtual machine requests that trigger the memory management flaw, causing the hypervisor to crash or become unresponsive. The impact extends beyond simple service interruption as it can affect business continuity, particularly in cloud environments where multiple virtual machines share the same physical hardware resources. The vulnerability also maps to ATT&CK technique T1499.001, which involves network denial of service attacks, and T1566.001, covering spearphishing attacks that could be used to deliver exploitation payloads. Organizations utilizing Hyper-V should implement immediate mitigations including applying security patches from Microsoft, disabling Hyper-V functionality on systems where it is not required, and implementing network segmentation to limit potential attack vectors. The patch addresses the underlying memory management flaw through improved input validation and enhanced synchronization mechanisms within the hypervisor's virtual machine communication protocols. Additionally, monitoring systems should be configured to detect anomalous virtual machine behavior that could indicate exploitation attempts, and network traffic analysis should be employed to identify suspicious patterns in virtual machine communication. The vulnerability demonstrates the critical importance of secure hypervisor implementation, as flaws in virtualization layers can compromise entire computing infrastructures and affect multiple tenant environments in cloud deployments.