Author: Melodie Foster
Date: 24th February 2021
Multiple critical remote code execution vulnerabilities were found in VMware ESXi and vSphere’s Client virtual infrastructure management platform that could have allowed attackers to take control of affected systems.
VMware said about the flaw, “A malicious actor with network access to port 443 may exploit this issue to execute commands with unrestricted privileges on the underlying operating system that hosts vCenter Server.” VMware expanded on the exploitation of the vulnerability, “the error allows an unauthorized user to send a specially crafted request, which will later give them the opportunity to execute arbitrary commands on the server.”
If an attacker had accomplished this it would allow them to move through the corporate network and gain access to information such as system users.
A second vulnerability found stems from a Server-Side Request Forgery due to improper validation of URLs in the vCenter Server plugin.
The flaw has been given a CVSS score of 9.8 out of 10 which means it is critical. VMware have provided remediations to both flaws outlined above to be used temporarily until updates can be deployed. 
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