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AUSCERT External Security Bulletin Redistribution
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
Operating System: Linux variants
Impact/Access: Administrator Compromise -- Remote/Unauthenticated
CVE Names: CVE-2021-21982
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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)
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.
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
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.
To remediate CVE-2021-21982 apply the updates listed in the 'Fixed Version'
column of the 'Response Matrix' below to affected deployments.
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
VMware would like to thank Egor Dimitrenko of Positive Technologies for
reporting this issue to us.
Product Version Running CVE Identifier CVSSv3 Severity Fixed Workarounds Additional
On Version Documentation
Black and Linux CVE-2021-21982 9.1 critical 1.0.2 None None
Fixed Version(s) and/or Release Notes
Mitre CVE Dictionary Links
FIRST CVSSv3 Calculator
5. Change Log
Initial security advisory.
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