Input validation error in vCenter Server and Cloud Foundation - CVE-2021-21985
Published: May 26, 2021 / Updated: February 20, 2022
Vulnerability identifier: #VU53595
CSH Severity: Critical
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:A/U:Red
CVE-ID: CVE-2021-21985
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
The vulnerability is being exploited in the wild
Vendor: VMware, Inc
Affected software:
vCenter Server
Cloud Foundation
vCenter Server
Cloud Foundation
Detailed vulnerability description
The vulnerability allows a remote attacker to compromise the affected system.
The vulnerability exists due to insufficient validation of user-supplied input within the Virtual SAN Health Check plug-in, which is enabled by default. A remote non-authenticated attacker can send a specially crafted HTTP request to the vSphere Client available at port 443/tcp and execute arbitrary commands with unrestricted privileges on the underlying operating system that hosts vCenter Server.
How to mitigate CVE-2021-21985
Install updates from vendor's website.