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Security Bulletin: Multiple vulnerabilities in VMware affect IBM Cloud Pak System

Security Bulletin


Summary

Multiple vulnerabilities have been identified in VMware, a supporting product shipped with IBM Cloud Pak System. Vulnerabilities in VMware vSphere Client (HTML5) for VMware vCenter plugins in vRealize Operations Environment, not used in Cloud Pak Systems, but for VMware vulnerabile vCenter endpoints exist. The recommendation is to apply workaround. Refer to the corresponding sections below for details.

Vulnerability Details

CVEID:   CVE-2021-21972
DESCRIPTION:   VMware vCenter Server could allow a remote attacker to execute arbitrary code on the system, caused by an error in the vSphere Client (HTML5). By sending a specially crafted request to port 443, an attacker could exploit this vulnerability to execute arbitrary code on the system.
CVSS Base score: 9.8
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/197192 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)

CVEID:   CVE-2021-21973
DESCRIPTION:   VMware vCenter Server is vulnerable to server-side request forgery, caused by improper validation of URLs in the vSphere Client (HTML5). By sending a specially-crafted POST request, a remote attacker could exploit this vulnerability to obtain sensitive information.
CVSS Base score: 5.3
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/197197 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N)

Affected Products and Versions

Affected Product(s) Version(s)
IBM Cloud Pak System 2.3.x.x

Remediation/Fixes

For unsupported version/release/platform, IBM recommends upgrading to fixed supported version of the of the product. Contact IBM CPS SWAT team for assistance.

Vulnerabilities remote code execution vulnerability (CVE-2021-21972) and server side request forgery (SSRF) (CVE-2021-21973) identified in VMware vSphere Client (HTML5) for VMware vCenter plugins in vRealize Operations Environment. These are not enabled by Cloud Pak Systems, but in VMware vCenter endpoints exist.

Refer to the following Workaround and Mitigations section for more information.

 

Workarounds and Mitigations

The workaround and mitigations are for the IBM Cloud Pak System v2.3.3.0, v2.3.3.3, v2.3.3.3 Interim Fix 1.

Vulnerabilities in VMware vSphere Client (HTML5) for VMware vCenter plugins in vRealize Operations Environment is not used in IBM Cloud Pak System, but for VMware vulnerable vCenter the endpoints exist. Until fix is available and can be deployed, the solution is to disable the vROps plugins and set them as 'incompatible'. This is a temporary solution that removes the possibility of exploitation. 

The recommendation is to disable the plugins endpoint. Consult https://kb.vmware.com/s/article/82374 for details. Contact IBM CPS Support (L2/L3) team for assistance.

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References

Off

Acknowledgement

Change History

11 Aug 2021: Initial Publication

*The CVSS Environment Score is customer environment specific and will ultimately impact the Overall CVSS Score. Customers can evaluate the impact of this vulnerability in their environments by accessing the links in the Reference section of this Security Bulletin.

Disclaimer

According to the Forum of Incident Response and Security Teams (FIRST), the Common Vulnerability Scoring System (CVSS) is an "industry open standard designed to convey vulnerability severity and help to determine urgency and priority of response." IBM PROVIDES THE CVSS SCORES ""AS IS"" WITHOUT WARRANTY OF ANY KIND, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. CUSTOMERS ARE RESPONSIBLE FOR ASSESSING THE IMPACT OF ANY ACTUAL OR POTENTIAL SECURITY VULNERABILITY.

Document Location

Worldwide

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Document Information

Modified date:
05 October 2021

UID

ibm16485985