CVE-2021-21985
Description
The vSphere Client (HTML5) contains a remote code execution vulnerability due to lack of input validation in the Virtual SAN Health Check plug-in which is enabled by default in vCenter Server. 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.
Summary dbcve.org
CVE-2021-21985 is a critical remote code execution vulnerability in the Virtual SAN Health Check plug-in of vSphere Client (HTML5) in vCenter Server. The plug-in lacks input validation, allowing a remote attacker with network access to port 443 to execute arbitrary commands with unrestricted privileges on the underlying operating system hosting vCenter Server.
Mitigation
Apply the VMware vCenter Server security patch for CVE-2021-21985 immediately, or disable the Virtual SAN Health Check plug-in as a workaround. Restrict network access to port 443 to trusted sources until patching is complete.