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             AUSCERT External Security Bulletin Redistribution

                               ESB-2021.1131
        VMSA-2021-0005 VMware Carbon Black Cloud Workload appliance
                   incorrect URL handling vulnerability
                               6 April 2021

===========================================================================

        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           VMware Carbon Black Cloud Workload appliance
Publisher:         VMWare
Operating System:  Linux variants
Impact/Access:     Administrator Compromise -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2021-21982  

Original Bulletin: 
   https://www.vmware.com/security/advisories/VMSA-2021-0005.html

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Advisory ID: VMSA-2021-0005
CVSSv3 Range: 9.1
Issue Date: 2021-04-01
Updated On: 2021-04-01 (Initial Advisory)
CVE(s): CVE-2021-21982
Synopsis: VMware Carbon Black Cloud Workload appliance update addresses
incorrect URL handling vulnerability (CVE-2021-21982)


1. Impacted Products

  o VMware Carbon Black Cloud Workload appliance.

2. Introduction

A vulnerability in VMware Carbon Black Cloud Workload appliance was privately
reported to VMware. An update is available to remediate this vulnerability in
the affected versions of the appliance.

3. Advisory Details

Description

A URL on the administrative interface of the VMware Carbon Black Cloud Workload
appliance can be manipulated to bypass authentication. VMware has evaluated the
severity of this issue to be in the Critical severity range with a maximum
CVSSv3 base score of 9.1.

Known Attack Vectors

A malicious actor with network access to the administrative interface of the
VMware Carbon Black Cloud Workload appliance may be able to obtain a valid
authentication token, granting access to the administration API of the
appliance. Successful exploitation of this issue would result in the attacker
being able to view and alter administrative configuration settings.

Resolution

To remediate CVE-2021-21982 apply the updates listed in the 'Fixed Version'
column of the 'Response Matrix' below to affected deployments.

Workarounds

None.

Mitigation

VMware best practices recommend implementing network controls to limit access
to the local administrative interface of the appliance. Unrestricted network
access to this interface is not required for the regular operation of the
product.

Additional Documentation

None.

Notes

None.

Acknowledgements

VMware would like to thank Egor Dimitrenko of Positive Technologies for
reporting this issue to us.

Response Matrix

Product   Version Running CVE Identifier CVSSv3 Severity Fixed   Workarounds Additional
                  On                                     Version             Documentation
VMware
Carbon    1.0.1
Black     and     Linux   CVE-2021-21982 9.1    critical 1.0.2   None        None
Cloud     prior
Workload
appliance

4. References

Fixed Version(s) and/or Release Notes
https://docs.vmware.com/en/VMware-Carbon-Black-Cloud-Workload/1.0/rn/
cbc-workload-102-release-notes.html

Mitre CVE Dictionary Links
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-21982

FIRST CVSSv3 Calculator
https://www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/
I:H/A:N

5. Change Log

2021-04-01 VMSA-2021-0005
Initial security advisory.

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