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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2021.3849.2 VMSA-2021-2025 - VMware vCenter Server updates address a privilege escalation vulnerability (CVE-2021-22048) 12 October 2022 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: VMware vCenter Server VMware Cloud Foundation Publisher: VMWare Operating System: Windows Virtualisation VMware ESX Server Impact/Access: Increased Privileges -- Existing Account Resolution: Mitigation CVE Names: CVE-2021-22048 Original Bulletin: https://www.vmware.com/security/advisories/VMSA-2021-0025.html Revision History: October 12 2022: New product added to matrix November 11 2021: Initial Release - --------------------------BEGIN INCLUDED TEXT-------------------- Advisory ID: VMSA-2021-0025.4 CVSSv3 Range: 7.1 Issue Date: 2021-11-10 Updated On: 2022-10-11 CVE(s): CVE-2021-22048 Synopsis: VMware vCenter Server updates address a privilege escalation vulnerability (CVE-2021-22048) 1. Impacted Products VMware vCenter Server (vCenter Server) VMware Cloud Foundation (Cloud Foundation) 2. Introduction A privilege escalation vulnerability in VMware Center Server was privately reported to VMware. Workarounds are available to remediate this vulnerability in the affected VMware products. 3. VMware vCenter Server IWA privilege escalation vulnerability (CVE-2021-22048) Description The vCenter Server contains a privilege escalation vulnerability in the IWA (Integrated Windows Authentication) authentication mechanism. VMware has evaluated the severity of this issue to be in the Important severity range with a maximum CVSSv3 base score of 7.1. Known Attack Vectors A malicious actor with non-administrative access to vCenter Server may exploit this issue to elevate privileges to a higher privileged group. Resolution None. Workarounds Workaround for CVE-2021-22048 is to switch to AD over LDAPS authentication OR Identity Provider Federation for AD FS (vSphere 7.0 or later) from Integrated Windows Authentication (IWA) as documented in the KB listed in the 'Workarounds' column of the 'Response Matrix' below. Additional Documentation [1] VMware has determined that vCenter 7.0u3f updates previously mentioned in the response matrix do not remediate CVE-2021-22048 and may introduce a functional issue for customers using IWA. Please review KB89027 for more information. Notes None. Acknowledgements VMware would like to thank Yaron Zinar and Sagi Sheinfeld of Crowdstrike for reporting this issue to us. Response Matrix +-----------+-----------+--------------+------------------+----------+------------+-----------------+---------------+-----------------+ | Product | Version | Running On | CVE Identifier | CVSSv3 | Severity | Fixed Version | Workarounds | Additional | | | | | | | | | | Documentation | |-----------+-----------+--------------+------------------+----------+------------+-----------------+---------------+-----------------| | vCenter | 8 | Any | CVE-2021-22048 | 7.1 | important | Patch | KB86292 | None | | Server | | | | | | Pending | | | | vCenter | 7 | Any | CVE-2021-22048 | 7.1 | important | Patch | KB86292 | KB8902 | | Server | | | | | | Pending | | 7 [1] | | | | | | | | [1] | | | | vCenter | 6.7 | Any | CVE-2021-22048 | 7.1 | important | Patch | KB86292 | None | | Server | | | | | | Pending | | | | vCenter | 6.5 | Any | CVE-2021-22048 | 7.1 | important | Patch | KB86292 | None | | Server | | | | | | Pending | | | +-----------+-----------+--------------+------------------+----------+------------+-----------------+---------------+-----------------+ Impacted Product Suites that Deploy Response Matrix Components: +------------+-----------+--------------+------------------+----------+------------+-----------------+---------------+-----------------+ | Product | Version | Running On | CVE Identifier | CVSSv3 | Severity | Fixed Version | Workarounds | Additional | | | | | | | | | | Documentation | |------------+-----------+--------------+------------------+----------+------------+-----------------+---------------+-----------------| | Cloud | 4.x | Any | CVE-2021-22048 | 7.1 | important | Patch | KB86292 | None | | Foundation | | | | | | pending | | | | (vCenter | | | | | | | | | | Server) | | | | | | | | | | Cloud | 3.x | Any | CVE-2021-22048 | 7.1 | important | Patch | KB86292 | None | | Foundation | | | | | | Pending | | | | (vCenter | | | | | | | | | | Server) | | | | | | | | | +------------+-----------+--------------+------------------+----------+------------+-----------------+---------------+-----------------+ 4. References Fixed Version(s) and Release Notes: KB86292 https://kb.vmware.com/s/article/86292 https://kb.vmware.com/s/article/89027 Mitre CVE Dictionary Links: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-22048 FIRST CVSSv3 Calculator: CVE-2021-22048: https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H 5. Change Log 2021-11-10 VMSA-2021-0025 Initial security advisory. 2021-11-15 VMSA-2021-0025.1 Added vCenter Server 6.5 in the Response Matrix. 2022-07-12 VMSA-2021-0025.2 Added fixed version of vCenter Server 7.0 in the Response Matrix. 2022-07-23 VMSA-2021-0025.3 VMware has determined that vCenter 7.0u3f updates previously mentioned in the response matrix do not remediate CVE-2021-22048 and introduce a functional issue. Please review KB89027 for more information. 2022-10-11 VMSA-2021-0025.4 Added vCenter Server 8.0 in the Response Matrix. - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. The mailing list you are subscribed to is maintained within your organisation, so if you do not wish to continue receiving these bulletins you should contact your local IT manager. If you do not know who that is, please send an email to auscert@auscert.org.au and we will forward your request to the appropriate person. NOTE: Third Party Rights This security bulletin is provided as a service to AusCERT's members. As AusCERT did not write the document quoted above, AusCERT has had no control over its content. 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