• VMware ESXi
• VMware vCenter Server (vCenter Server)
  
• VMware Cloud Foundation (Cloud Foundation)
  

Multiple vulnerabilities in VMware ESXi and vSphere Client (HTML5) were privately reported to VMware. Updates are available to remediate these vulnerabilities in affected VMware products.

The vSphere Client (HTML5) contains a remote code execution vulnerability in a vCenter Server plugin. VMware has evaluated the severity of this issue to be in the Critical severity range with a maximum CVSSv3 base score of 9.8.

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. 

To remediate CVE-2021-21972 apply the updates listed in the 'Fixed Version' column of the 'Response Matrix' below to affected deployments.

Workarounds for CVE-2021-21972 have been listed in the 'Workarounds' column of the 'Response Matrix' below.

None.

The affected vCenter Server plugin for vROPs is available in all default installations. vROPs does not need be present to have this endpoint available. Follow the workarounds KB to disable it.

VMware would like to thank Mikhail Klyuchnikov of Positive Technologies for reporting this issue to us.

OpenSLP as used in ESXi has a heap-overflow vulnerability. VMware has evaluated the severity of this issue to be in the Important severity range with a maximum CVSSv3 base score of 8.8.

A malicious actor residing within the same network segment as ESXi who has access to port 427 may be able to trigger the heap-overflow issue in OpenSLP service resulting in remote code execution.

To remediate CVE-2021-21974 apply the updates listed in the 'Fixed Version' column of the 'Response Matrix' below to affected deployments.

Workarounds for CVE-2021-21974 have been listed in the 'Workarounds' column of the 'Response Matrix' below.

None.

[1] Per the Security Configuration Guides for VMware vSphere, VMware now recommends disabling the OpenSLP service in ESXi if it is not used. For more information, see our blog posting: https://blogs.vmware.com/vsphere/2021/02/evolving-the-vmware-vsphere-security-configuration-guides.html

[2] KB82705 documents steps to consume ESXi hot patch asynchronously on top of latest VMware Cloud Foundation (VCF) supported ESXi build. 

VMware would like to thank Lucas Leong (@_wmliang_) of Trend Micro's Zero Day Initiative for reporting this issue to us.

The vSphere Client (HTML5) contains an SSRF (Server Side Request Forgery) vulnerability due to improper validation of URLs in a vCenter Server plugin. VMware has evaluated the severity of this issue to be in the Moderate severity range with a maximum CVSSv3 base score of 5.3.

A malicious actor with network access to port 443 may exploit this issue by sending a POST request to vCenter Server plugin leading to information disclosure.

To remediate CVE-2021-21973 apply the updates listed in the 'Fixed Version' column of the 'Response Matrix' below to affected deployments.

Workarounds for CVE-2021-21973 have been listed in the 'Workarounds' column of the 'Response Matrix' below.

None.

The affected vCenter Server plugin for vROPs is available in all default installations. vROPs does not need be present to have this endpoint available. Follow the workarounds KB to disable it.

VMware would like to thank Mikhail Klyuchnikov of Positive Technologies for reporting this issue to us.

VMware ESXi 7.0 ESXi70U1c-17325551
https://my.vmware.com/group/vmware/patch
https://docs.vmware.com/en/VMware-vSphere/7.0/rn/vsphere-esxi-70u1c.html

VMware ESXi 6.7 ESXi670-202102401-SG
https://my.vmware.com/group/vmware/patch
https://docs.vmware.com/en/VMware-vSphere/6.7/rn/esxi670-202102001.html

VMware ESXi 6.5 ESXi650-202102101-SG
https://my.vmware.com/group/vmware/patch
https://docs.vmware.com/en/VMware-vSphere/6.5/rn/esxi650-202102001.html

VMware vCloud Foundation 4.2
Downloads and Documentation:
https://docs.vmware.com/en/VMware-Cloud-Foundation/4.2/rn/VMware-Cloud-Foundation-42-Release-Notes.html

VMware vCloud Foundation 3.10.1.2
Downloads and Documentation:
https://docs.vmware.com/en/VMware-Cloud-Foundation/3.10.1/rn/VMware-Cloud-Foundation-3101-Release-Notes.html

vCenter Server 7.0.1 Update 1
Downloads and Documentation:
https://my.vmware.com/web/vmware/downloads/details?downloadGroup=VC70U1C&productId=974
https://docs.vmware.com/en/VMware-vSphere/7.0/rn/vsphere-vcenter-server-70u1c-release-notes.html

vCenter Server 6.7 U3l
Downloads and Documentation:
https://my.vmware.com/web/vmware/downloads/details?downloadGroup=VC67U3L&productId=742&rPId=57171
https://docs.vmware.com/en/VMware-vSphere/6.7/rn/vsphere-vcenter-server-67u3l-release-notes.html

vCenter Server 6.5 U3n
Downloads and Documentation:
https://my.vmware.com/web/vmware/downloads/details?downloadGroup=VC65U3N&productId=614&rPId=60942
https://docs.vmware.com/en/VMware-vSphere/6.5/rn/vsphere-vcenter-server-65u3n-release-notes.html

Mitre CVE Dictionary Links:
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-21972
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-21973
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-21974

FIRST CVSSv3 Calculator:
CVE-2021-21972: https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVE-2021-21973: https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
CVE-2021-21974: https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

2021-02-23 VMSA-2021-0002
Initial security advisory.

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