Exploited
critical
10
CWE
20
Advisory Published
Updated

CVE-2021-21985: VMware vCenter Server Improper Input Validation Vulnerability

First published: Wed May 26 2021(Updated: )

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.

Credit: security@vmware.com security@vmware.com

Affected SoftwareAffected VersionHow to fix
VMware vCenter Server=6.5
VMware vCenter Server=6.5-a
VMware vCenter Server=6.5-b
VMware vCenter Server=6.5-c
VMware vCenter Server=6.5-d
VMware vCenter Server=6.5-e
VMware vCenter Server=6.5-f
VMware vCenter Server=6.5-update1
VMware vCenter Server=6.5-update1b
VMware vCenter Server=6.5-update1c
VMware vCenter Server=6.5-update1d
VMware vCenter Server=6.5-update1e
VMware vCenter Server=6.5-update1g
VMware vCenter Server=6.5-update2
VMware vCenter Server=6.5-update2b
VMware vCenter Server=6.5-update2c
VMware vCenter Server=6.5-update2d
VMware vCenter Server=6.5-update2g
VMware vCenter Server=6.5-update3
VMware vCenter Server=6.5-update3d
VMware vCenter Server=6.5-update3f
VMware vCenter Server=6.5-update3k
VMware vCenter Server=6.5-update3n
VMware vCenter Server=6.7
VMware vCenter Server=6.7-a
VMware vCenter Server=6.7-b
VMware vCenter Server=6.7-d
VMware vCenter Server=6.7-update1
VMware vCenter Server=6.7-update1b
VMware vCenter Server=6.7-update2
VMware vCenter Server=6.7-update2a
VMware vCenter Server=6.7-update2c
VMware vCenter Server=6.7-update3
VMware vCenter Server=6.7-update3a
VMware vCenter Server=6.7-update3b
VMware vCenter Server=6.7-update3f
VMware vCenter Server=6.7-update3g
VMware vCenter Server=6.7-update3j
VMware vCenter Server=6.7-update3l
VMware vCenter Server=6.7-update3m
VMware vCenter Server=7.0
VMware vCenter Server=7.0-a
VMware vCenter Server=7.0-b
VMware vCenter Server=7.0-c
VMware vCenter Server=7.0-d
VMware vCenter Server=7.0-update1
VMware vCenter Server=7.0-update1a
VMware vCenter Server=7.0-update1c
VMware vCenter Server=7.0-update1d
VMware vCenter Server=7.0-update2
VMware vCenter Server=7.0-update2a
VMware Cloud Foundation>=3.0<3.10.2.1
VMware Cloud Foundation>=4.0<4.2.1

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Reference Links

Frequently Asked Questions

  • What is CVE-2021-21985?

    CVE-2021-21985 is a vulnerability in VMware vCenter Server that allows remote code execution.

  • How severe is CVE-2021-21985?

    CVE-2021-21985 has a severity rating of 9.8, which is considered critical.

  • What is the affected software?

    The affected software is VMware vCenter Server versions 6.5, 6.7, and 7.0, as well as VMware Cloud Foundation versions 3.0 to 4.2.1.

  • Is the Virtual SAN Health Check plug-in enabled by default?

    Yes, the Virtual SAN Health Check plug-in is enabled by default in vCenter Server.

  • How can I fix CVE-2021-21985?

    To fix CVE-2021-21985, apply the necessary patches provided by VMware and follow their recommended mitigation steps.

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