high
7.8
Advisory Published
Updated

CVE-2021-21991

First published: Wed Sep 22 2021(Updated: )

The vCenter Server contains a local privilege escalation vulnerability due to the way it handles session tokens. A malicious actor with non-administrative user access on vCenter Server host may exploit this issue to escalate privileges to Administrator on the vSphere Client (HTML5) or vCenter Server vSphere Web Client (FLEX/Flash).

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
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

Remedy

https://www.vmware.com/security/advisories/VMSA-2021-0020.html

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Reference Links

Frequently Asked Questions

  • What is the vulnerability ID for this issue?

    The vulnerability ID for this issue is CVE-2021-21991.

  • What is the severity of CVE-2021-21991?

    The severity of CVE-2021-21991 is high.

  • What software is affected by CVE-2021-21991?

    VMware Cloud Foundation and VMware vCenter Server versions 6.5, 6.7, and 7.0 are affected by CVE-2021-21991.

  • How does CVE-2021-21991 exploit work?

    CVE-2021-21991 exploits a local privilege escalation vulnerability in vCenter Server by manipulating session tokens to escalate privileges.

  • Is there a fix available for CVE-2021-21991?

    Yes, VMware has released patches to address the vulnerability. Please refer to the official VMware security advisory for the appropriate fix for your specific version of the affected software.

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