CVE-2015-1647 in Windows
Summary
by MITRE
Virtual Machine Manager (VMM) in Hyper-V in Microsoft Windows 8.1 and Windows Server 2012 R2 allows guest OS users to cause a denial of service (VMM functionality loss) via a crafted application, aka "Windows Hyper-V DoS Vulnerability."
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Analysis
by VulDB Data Team • 11/30/2024
The vulnerability identified as CVE-2015-1647 represents a critical denial of service weakness within Microsoft Hyper-V's Virtual Machine Manager component. This flaw affects both Windows 8.1 and Windows Server 2012 R2 operating systems, creating a significant security concern for virtualized environments where Hyper-V serves as the primary hypervisor platform. The vulnerability stems from insufficient input validation and error handling mechanisms within the VMM functionality that governs virtual machine operations and resource management.
The technical exploitation of this vulnerability occurs when a malicious guest operating system user executes a specially crafted application designed to trigger malformed or unexpected inputs to the Hyper-V Virtual Machine Manager. This crafted application specifically targets the VMM's processing routines that handle virtual machine state management, resource allocation, and hypervisor-level operations. The flaw manifests as an improper handling of certain memory management operations or virtual machine configuration parameters that causes the VMM service to become unresponsive or crash entirely. According to CWE-20 standards for weakness enumeration, this represents a classic input validation vulnerability where the system fails to properly sanitize or validate data inputs from untrusted sources, leading to system instability.
The operational impact of CVE-2015-1647 extends beyond simple service disruption, as it can result in complete loss of VMM functionality within affected Hyper-V environments. When exploited successfully, the vulnerability can cause virtual machines to become unresponsive, leading to potential data loss and service interruptions for organizations relying on virtualized infrastructure. This vulnerability particularly affects enterprise environments where multiple virtual machines operate on a single host system, as the DoS condition can cascade and impact the entire virtualization platform. The attack vector is particularly concerning because it requires only guest OS privileges, meaning that an attacker with limited access to a virtual machine could potentially compromise the entire host system's virtualization capabilities.
From a threat modeling perspective, this vulnerability aligns with ATT&CK technique T1499.001 for network denial of service attacks, though it operates at the hypervisor level rather than network level. The vulnerability creates a pathway for privilege escalation and system compromise that can be leveraged by attackers to disrupt business operations and potentially gain deeper access to underlying infrastructure. Organizations utilizing Hyper-V in production environments face significant risk exposure, particularly in scenarios where guest operating systems may be compromised or where users have elevated privileges within virtualized environments. The vulnerability's impact is amplified in cloud computing deployments where multiple tenants share the same physical infrastructure, as a successful attack could potentially affect other virtual machines hosted on the same physical host.
Mitigation strategies for CVE-2015-1647 should include immediate deployment of Microsoft security patches and updates, particularly the cumulative updates released in response to this vulnerability. Organizations should implement network segmentation and access controls to limit guest OS privileges and reduce the attack surface available to potential exploiters. Additionally, monitoring systems should be enhanced to detect unusual patterns in virtual machine behavior or resource utilization that might indicate exploitation attempts. The vulnerability highlights the critical importance of maintaining up-to-date virtualization platform security patches and implementing robust security monitoring within virtualized environments. Organizations should also consider implementing hypervisor-level security controls and ensuring that virtual machine configurations follow security best practices to minimize the potential impact of such vulnerabilities.