medium
6.8
Advisory Published
Updated

CVE-2021-21992

First published: Wed Sep 22 2021(Updated: )

The vCenter Server contains a denial-of-service vulnerability due to improper XML entity parsing. A malicious actor with non-administrative user access to the vCenter Server vSphere Client (HTML5) or vCenter Server vSphere Web Client (FLEX/Flash) may exploit this issue to create a denial-of-service condition on the vCenter Server host.

Credit: security@vmware.com

Affected SoftwareAffected VersionHow to fix
VMware Cloud Foundation>=3.0<3.10.2.2
VMware Cloud Foundation>=4.0<4.3
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=6.5-update3p
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=6.7-update3n
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 vCenter Server=7.0-update2b

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Reference Links

Frequently Asked Questions

  • What is CVE-2021-21992?

    CVE-2021-21992 is a denial-of-service vulnerability in the vCenter Server due to improper XML entity parsing.

  • How does CVE-2021-21992 affect VMware products?

    CVE-2021-21992 affects VMware Cloud Foundation and VMware vCenter Server versions 6.5, 6.7, and 7.0.

  • What is the severity of CVE-2021-21992?

    The severity of CVE-2021-21992 is medium with a CVSS score of 6.5.

  • Who can exploit CVE-2021-21992?

    A malicious actor with non-administrative user access to the vCenter Server vSphere Client or vCenter Server vSphere Web Client can exploit CVE-2021-21992.

  • How can CVE-2021-21992 be fixed?

    VMware has released patches and recommends upgrading to the fixed versions mentioned in the advisory (https://www.vmware.com/security/advisories/VMSA-2021-0020.html).

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