CVE-2020-3992 : Vulnerability Insights and Analysis

OpenSLP in VMware ESXi versions 7.0, 6.7, and 6.5 before specified updates has a use-after-free vulnerability allowing remote code execution.

Understanding CVE-2020-3992

OpenSLP vulnerability in VMware ESXi

What is CVE-2020-3992?

CVE-2020-3992 is a use-after-free issue in OpenSLP within VMware ESXi versions 7.0, 6.7, and 6.5, potentially leading to remote code execution.

The Impact of CVE-2020-3992

The vulnerability allows a malicious actor on the management network to exploit port 427 on an ESXi machine, triggering a use-after-free in OpenSLP and enabling remote code execution.

Technical Details of CVE-2020-3992

Details of the vulnerability

Vulnerability Description

OpenSLP in VMware ESXi is susceptible to a use-after-free flaw, which can be exploited by an attacker to execute arbitrary code remotely.

Affected Systems and Versions

VMware ESXi 7.0 before ESXi_7.0.1-0.0.16850804
VMware ESXi 6.7 before ESXi670-202010401-SG
VMware ESXi 6.5 before ESXi650-202010401-SG

Exploitation Mechanism

A threat actor with access to port 427 on an ESXi machine in the management network can exploit the OpenSLP service, triggering the use-after-free vulnerability for remote code execution.

Mitigation and Prevention

Protecting against CVE-2020-3992

Immediate Steps to Take

Apply the necessary security updates provided by VMware promptly.
Restrict network access to vulnerable systems.
Monitor network traffic for any suspicious activity.

Long-Term Security Practices

Regularly update and patch all software and systems.
Implement network segmentation to limit the impact of potential breaches.

Patching and Updates

VMware has released updates to address the vulnerability; ensure timely installation of these patches to mitigate the risk of exploitation.