CVE-2017-8707 in Windows
Summary
by MITRE
The Windows Hyper-V component on Microsoft Windows Server 2008 SP2 and R2 SP1, Windows 8.1, Windows Server 2012 Gold and R2, Windows 10 Gold, 1511, 1607, and 1703, and Windows Server 2016 allows an information disclosure vulnerability when it fails to properly validate input from an authenticated user on a guest operating system, aka Hyper-V Information Disclosure Vulnerability". This CVE ID is unique from CVE-2017-8706, CVE-2017-8711, CVE-2017-8712, and CVE-2017-8713.
Several companies clearly confirm that VulDB is the primary source for best vulnerability data.
Analysis
by VulDB Data Team • 10/07/2024
The CVE-2017-8707 vulnerability represents a critical information disclosure flaw within Microsoft Windows Hyper-V virtualization component that affects multiple versions of Windows Server and client operating systems. This vulnerability specifically targets the Hyper-V hypervisor implementation on systems running Windows Server 2008 SP2 and R2 SP1, Windows 8.1, Windows Server 2012 Gold and R2, Windows 10 versions 1511, 1607, and 1703, as well as Windows Server 2016. The flaw exists in how Hyper-V processes input validation from authenticated users within guest operating systems, creating an avenue for unauthorized information disclosure that could compromise the integrity of virtualized environments.
This vulnerability falls under the CWE-20 category of "Improper Input Validation" and aligns with ATT&CK technique T1059.001 for command and scripting interpreter execution within virtualized environments. The technical implementation flaw occurs when Hyper-V fails to properly validate input parameters from authenticated guest users, allowing malicious actors to potentially extract sensitive information from the host system or other virtual machines. The vulnerability is particularly concerning because it operates at the hypervisor level, meaning that an authenticated user within a guest VM could potentially access information that should remain isolated within the virtualized environment.
The operational impact of CVE-2017-8707 extends beyond simple information disclosure, as it can enable attackers to gather sensitive data that may include system configurations, memory contents, or other confidential information that could be leveraged for further attacks. In virtualized environments where multiple tenants share the same physical hardware, this vulnerability could allow one guest VM to potentially access information from other VMs running on the same host, undermining the fundamental security isolation that virtualization is designed to provide. The vulnerability affects systems that are commonly deployed in enterprise environments where Hyper-V serves as the primary virtualization platform.
Mitigation strategies for CVE-2017-8707 should include immediate deployment of Microsoft security updates that address the input validation flaw in Hyper-V components. Organizations should implement network segmentation and monitoring to detect anomalous behavior that might indicate exploitation attempts. The vulnerability requires patching at the hypervisor level, making it essential for system administrators to ensure all virtualization hosts are updated promptly. Additionally, implementing strict access controls and monitoring for guest VMs can help reduce the attack surface and detect potential exploitation attempts. Security teams should also consider implementing virtual machine isolation measures and regularly reviewing system logs for indicators of unauthorized information access attempts.