CVE-2017-8713 in Windows
Summary
by MITRE
The Windows Hyper-V component on Microsoft Windows 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-2017-8707, CVE-2017-8711, CVE-2017-8712, and CVE-2017-8706.
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Analysis
by VulDB Data Team • 10/07/2024
The CVE-2017-8713 vulnerability represents a critical information disclosure flaw within Microsoft Windows Hyper-V virtualization component that affects multiple operating system versions including Windows 8.1, Windows Server 2012 R2, Windows 10 versions 1511, 1607, and 1703, as well as Windows Server 2016. This vulnerability stems from the Hyper-V hypervisor's insufficient validation of input data originating from authenticated guest operating systems, creating a pathway for unauthorized information exposure that could compromise the integrity of virtualized environments.
The technical flaw manifests when Hyper-V fails to properly sanitize and validate input parameters provided by authenticated users within guest VMs, allowing malicious actors to exploit this weakness to extract sensitive information from the host system or other virtual machines. This vulnerability operates at the hypervisor level where guest operating systems can potentially bypass normal security boundaries through crafted input sequences that exploit the validation gaps in Hyper-V's input handling mechanisms. The issue is categorized under CWE-20 as a "Improper Input Validation" vulnerability, specifically affecting the virtualization layer where guest-to-host communication occurs.
The operational impact of CVE-2017-8713 extends beyond simple information disclosure, as it can enable attackers to potentially escalate privileges, access confidential data, or disrupt virtualized environments. Attackers leveraging this vulnerability could extract memory contents, configuration details, or other sensitive information that should remain isolated within their respective virtual machines. This information disclosure could facilitate further attacks, including privilege escalation attempts or the discovery of additional vulnerabilities within the virtualized infrastructure. The vulnerability affects organizations running Hyper-V environments where multiple tenants or users share the same physical hardware, creating potential cross-tenant information leakage scenarios.
Mitigation strategies for CVE-2017-8713 should focus on immediate patch deployment through Microsoft's regular security updates, ensuring all affected systems receive the necessary fixes. Organizations should implement network segmentation to limit guest VM communication and consider disabling unnecessary Hyper-V features that might expose additional attack vectors. Security monitoring should be enhanced to detect unusual patterns in virtual machine input handling or unexpected information flows between guest and host systems. The vulnerability aligns with ATT&CK technique T1059.001 for command and scripting interpreter usage, as attackers might leverage this information disclosure to gain additional footholds within the virtualized environment. Additionally, implementing proper access controls and least privilege principles for guest VM users can significantly reduce the exploitation risk. Regular vulnerability assessments and penetration testing of virtualized environments are essential to identify similar input validation weaknesses that could be exploited in conjunction with or independently from this specific vulnerability.