VMSA-2021-0012:VMware Carbon Black App Control update addresses authentication bypass
23604
20 June 2021
20 June 2021
CLOSED
CRITICAL
9.4
CVE-2021-21998
1. Impacted Products
- VMware Carbon Black App Control (AppC)
2. Introduction
An authentication bypass in the VMware Carbon Black App Control management server was privately reported to VMware. Updates are available to remediate this vulnerability in the affected VMware product.
3. VMware Carbon Black App Control updates address authentication bypass (CVE-2021-21998)
Description
The VMware Carbon Black App Control management server has an authentication bypass. VMware has evaluated the severity of this issue to be in the Critical severity range with a maximum CVSSv3 base score of 9.4.
Known Attack Vectors
A malicious actor with network access to the VMware Carbon Black App Control management server might be able to obtain administrative access to the product without the need to authenticate.
Resolution
To remediate CVE-2021-21998, apply the patches listed in the 'Fixed Version' column of the 'Response Matrix' found below.
Workarounds
None.
Additional Documentation
None.
Notes
Login to the Carbon Black UEX Portal is required to download fixes.
Acknowledgements
None
Response Matrix
| Product | Version | Running On | CVE Identifier | CVSSv3 | Severity | Fixed Version | Workarounds | Additional Documentation |
| AppC | 8.6.x | Windows | CVE-2021-21998 | critical | None | None | ||
| AppC | 8.5.x | Windows | CVE-2021-21998 | critical | None | None | ||
| AppC | 8.1.x, 8.0.x | Windows | CVE-2021-21998 | critical | None | None |
4. References
VMware Carbon Black App Control 8.6.2, 8.5.8, 8.1.x, 8.0.x
Downloads and Documentation:
Mitre CVE Dictionary Links:
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-21998
FIRST CVSSv3 Calculator:
CVE-2021-21998: 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:L
5. Change Log
2021-06-22 VMSA-2021-0012
Initial security advisory.
6. Contact
E-mail list for product security notifications and announcements:
https://lists.vmware.com/cgi-bin/mailman/listinfo/security-announce
This Security Advisory is posted to the following lists:
security-announce@lists.vmware.com
E-mail: security@vmware.com
PGP key at:
VMware Security Advisories
https://www.vmware.com/security/advisories
VMware Security Response Policy
https://www.vmware.com/support/policies/security_response.html
VMware Lifecycle Support Phases
https://www.vmware.com/support/policies/lifecycle.html
VMware Security & Compliance Blog
https://blogs.vmware.com/security
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