CVE-2020-3967 : Vulnerability Insights and Analysis
Learn about CVE-2020-3967 affecting VMware ESXi, Workstation, and Fusion products, allowing unauthorized code execution on the hypervisor from a virtual machine. Find mitigation steps and necessary updates.
VMware ESXi, Workstation, and Fusion products are affected by a heap-overflow vulnerability in the USB 2.0 controller (EHCI), potentially allowing code execution on the hypervisor from a virtual machine.
Understanding CVE-2020-3967
This CVE involves a critical vulnerability in VMware products that could be exploited by a malicious actor with local access to a virtual machine.
What is CVE-2020-3967?
CVE-2020-3967 is a heap-overflow vulnerability present in VMware ESXi, Workstation, and Fusion products, allowing unauthorized code execution on the hypervisor.
The Impact of CVE-2020-3967
The vulnerability could enable an attacker to execute arbitrary code on the hypervisor from a virtual machine, posing a significant security risk to affected systems.
Technical Details of CVE-2020-3967
This section provides detailed technical information about the vulnerability.
Vulnerability Description
The heap-overflow vulnerability in the USB 2.0 controller (EHCI) of VMware ESXi, Workstation, and Fusion products allows for potential code execution on the hypervisor from a virtual machine.
Affected Systems and Versions
- VMware ESXi 7.0 before ESXi_7.0.0-1.20.16321839
- VMware ESXi 6.7 before ESXi670-202004101-SG
- VMware ESXi 6.5 before ESXi650-202005401-SG
- VMware Workstation 15.x before 15.5.5
- VMware Fusion 11.x before 11.5.5
Exploitation Mechanism
To exploit this vulnerability, a malicious actor needs local access to a virtual machine. Additional specific conditions beyond the attacker's control must also be met for successful exploitation.
Mitigation and Prevention
Protecting systems from CVE-2020-3967 requires immediate actions and long-term security practices.
Immediate Steps to Take
- Apply the necessary security patches provided by VMware promptly.
- Monitor for any unusual activities on the affected systems.
- Restrict access to virtual machines to authorized personnel only.
Long-Term Security Practices
- Regularly update and patch VMware products to mitigate potential vulnerabilities.
- Implement network segmentation to limit the impact of security breaches.
Patching and Updates
Ensure that all affected VMware products are updated to the following versions or later:
- VMware ESXi 7.0.0-1.20.16321839
- VMware ESXi 6.7.0-202004101-SG
- VMware ESXi 6.5.0-202005401-SG
- VMware Workstation 15.5.5
- VMware Fusion 11.5.5