CVE-2019-5519 : Exploit Details and Defense Strategies
Learn about CVE-2019-5519 affecting VMware ESXi, Workstation, and Fusion versions, allowing unauthorized code execution. Find mitigation steps and update recommendations.
VMware ESXi, Workstation, and Fusion versions prior to specified updates contain a Time-of-check Time-of-use (TOCTOU) vulnerability in the virtual USB 1.1 UHCI. This flaw could allow a guest to execute code on the host machine.
Understanding CVE-2019-5519
In VMware ESXi, Workstation, and Fusion products, a security vulnerability exists in the virtual USB controller, potentially enabling code execution on the host machine.
What is CVE-2019-5519?
This CVE refers to a TOCTOU vulnerability in VMware ESXi 6.7, 6.5, 6.0, Workstation 15.x, 14.x, Fusion 11.x, and 10.x, allowing unauthorized code execution on the host.
The Impact of CVE-2019-5519
Exploitation of this vulnerability requires access to a virtual machine with a virtual USB controller. Successful attacks could lead to unauthorized code execution on the host system.
Technical Details of CVE-2019-5519
This section provides detailed technical information about the vulnerability.
Vulnerability Description
The vulnerability lies in the virtual USB 1.1 UHCI in VMware ESXi, Workstation, and Fusion products, creating a TOCTOU scenario.
Affected Systems and Versions
- VMware ESXi 6.7, 6.5, 6.0
- Workstation 15.x, 14.x
- Fusion 11.x, 10.x
Exploitation Mechanism
To exploit this flaw, an attacker needs access to a virtual machine with a virtual USB controller, allowing potential code execution on the host.
Mitigation and Prevention
Protect your systems from CVE-2019-5519 with the following steps:
Immediate Steps to Take
- Apply the necessary security updates provided by VMware.
- Restrict access to virtual machines with USB controllers.
- Monitor and restrict guest activities on virtual machines.
Long-Term Security Practices
- Regularly update VMware products to the latest versions.
- Implement network segmentation to isolate critical systems.
- Conduct security audits and vulnerability assessments periodically.
Patching and Updates
Ensure timely installation of security patches and updates released by VMware to address CVE-2019-5519.