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Document Subtype: Security Bulletin Document ID: hpesbst04115en_us Last Updated: 2021-04-15 Release Date: 2021-04-07 Document Version: 2 Potential Security Impact: Remote: Code Execution Source: Hewlett Packard Enterprise, HPE Product Security Response Team VULNERABILITY SUMMARY VMware announced multiple security vulnerabilities on systems running on various versions of ESXi hypervisor and vCenter servers. This can potentially impact HPE SimpliVity systems (HPE SimpliVity 380 Gen 9, HPE SimpliVity 380 Gen 10, HPE SimpliVity 380 Gen 10 G, HPE SimpliVity Gen 10 H, HPE SimpliVity 325 Gen 10, HPE SimpliVity 2600 Gen 10, SimpliVity OmniCube, SimpliVity OmniStack for Cisco, SimpliVity OmniStack for Lenovo and SimpliVity OmniStack for Dell nodes) running on any of the impacted versions (7.0 before Update 1c , 6.7 before EP18, 6.5 before P06). Information about these vulnerabilities: CVE-2021-21974 (ESXi Hypervisor) A malicious actor residing in the management network who has access to port 427 on ESXi host may be able to trigger the heap-overflow issue in OpenSLP service resulting in remote code execution. CVE-2021-21972 (vCenter Server) A malicious actor with network access to port 443 may exploit this issue to execute commands with unrestricted privileges on the underlying operating system that hosts vCenter Server. CVE-2021-21973 (vCenter Server) A malicious actor with network access to port 443 may exploit this issue by sending a POST request to vCenter Server plugin leading to information disclosure. References: CVE-2021-21974 CVE-2021-21972 CVE-2021-21973 SUPPORTED SOFTWARE VERSIONS*: ONLY impacted versions are listed. HPE SimpliVity 2600 - depends on ESXi version see HPE SimpliVity OmniStack Interoperability Guide HPE SimpliVity 2600 Gen10 - depends on ESXi version see HPE SimpliVity OmniStack Interoperability Guide HPE SimpliVity 325 - depends on ESXi version see HPE SimpliVity OmniStack Interoperability Guide HPE SimpliVity 380 - depends on ESXi version see HPE SimpliVity OmniStack Interoperability Guide HPE SimpliVity 380 Gen10 - depends on ESXi version see HPE SimpliVity OmniStack Interoperability Guide HPE SimpliVity 380 Gen10 G - depends on ESXi version see HPE SimpliVity OmniStack Interoperability Guide HPE SimpliVity 380 Gen10 H - depends on ESXi version see HPE SimpliVity OmniStack Interoperability Guide HPE SimpliVity 380 Gen9 - depends on ESXi version see HPE SimpliVity OmniStack Interoperability Guide SimpliVity OmniCube - HPE OmniStack 3.7.10 U1 or earlier SimpliVity OmniStack for Cisco - HPE OmniStack 3.7.10 U1 or earlier SimpliVity OmniStack for Dell - HPE OmniStack 3.7.10 U1 or earlier SimpliVity OmniStack for Lenovo - HPE OmniStack 3.7.10 U1 or earlier BACKGROUND HPE calculates CVSS using CVSS Version 3.1. If the score is provided from NIST, we will display Version 2.0, 3.0, or 3.1 as provided from NVD. Reference V3 Vector V3 Base Score V2 Vector V2 Base Score CVE-2021-21972 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H) 9.8 (AV:N/AC:L/Au:N/C:C/I:C/A:C) 10 CVE-2021-21973 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N) 5.3 (AV:N/AC:L/Au:N/C:P/I:N/A:N) 5 CVE-2021-21974 (CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H) 8.8 (AV:A/AC:L/Au:N/C:P/I:P/A:P) 5.8 Information on CVSS is documented in HPE Customer Notice: HPSN-2008-002 RESOLUTION HPE has recommended remediation by applying patches for the impacted version: For ESXi For ESXi version 6.5 apply ESXi 6.5 P06 For ESXi version 6.7 apply ESXi 6.7 EP 18 For ESXi version 7.0 apply ESXi 7.0 Update 1d For vSphere Client For vCenter 6.5 version apply vCenter Server 6.5 Update 3n or vCenter Server Appliance 6.5 Update 3n (VCSA) For vCenter 6.7 version apply vCenter Server 6.7 Update 3l or vCenter Server Appliance 6.7 Update 3l (VCSA) For vCenter 7.0 version apply the manual workaround as suggested in https://kb.vmware.com/s/article/82374 IMPORTANT: Please refer to the HPE SimpliVity OmniStack Interoperability Guide for the latest firmware and software policies, hypervisor guidelines and supported upgrade paths. HISTORY Version:1 (rev.1) - 7 April 2021 Initial release Version:2 (rev.2) - 15 April 2021 clarified resolution text Third Party Security Patches: Third party security patches that are to be installed on systems running Hewlett Packard Enterprise (HPE) software products should be applied in accordance with the customer's patch management policy. Support: For issues about implementing the recommendations of this Security Bulletin, contact normal HPE Services support channel. For other issues about the content of this Security Bulletin, send e-mail to security-alert@hpe.com. Report: To report a potential security vulnerability for any HPE supported product: Web Form: https://www.hpe.com/info/report-security-vulnerability Email: security-alert@hpe.com Hewlett Packard Enterprise Product Security Response Policy: https://support.hpe.com/hpesc/public/docDisplay?docLocale=en_US&docId=a00100637en_us Subscribe: To initiate a subscription to receive future HPE Security Bulletin alerts via Email: http://www.hpe.com/support/Subscriber_Choice Security Bulletin Archive: A list of recently released Security Bulletins is available here: http://www.hpe.com/support/Security_Bulletin_Archive System management and security procedures must be reviewed frequently to maintain system integrity. HPE is continually reviewing and enhancing the security features of software products to provide customers with current secure solutions. "HPE is broadly distributing this Security Bulletin in order to bring to the attention of users of the affected HPE products the important security information contained in this Bulletin. HPE recommends that all users determine the applicability of this information to their individual situations and take appropriate action. HPE does not warrant that this information is necessarily accurate or complete for all user situations and, consequently, HPE will not be responsible for any damages resulting from user's use or disregard of the information provided in this Bulletin. To the extent permitted by law, HPE disclaims all warranties, either express or implied, including the warranties of merchantability and fitness for a particular purpose, title and non-infringement." ©Copyright 2025 Hewlett Packard Enterprise Development LP Hewlett Packard Enterprise Development shall not be liable for technical or editorial errors or omissions contained herein. The information provided is provided "as is" without warranty of any kind. To the extent permitted by law, neither HPE nor its affiliates, subcontractors or suppliers will be liable for incidental, special or consequential damages including downtime cost; lost profits; damages relating to the procurement of substitute products or services; or damages for loss of data, or software restoration. The information in this document is subject to change without notice. Hewlett Packard Enterprise Development and the names of Hewlett Packard Enterprise Development products referenced herein are trademarks of Hewlett Packard Enterprise Development in the United States and other countries. Other product and company names mentioned herein may be trademarks of their respective owners.
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HPE has recommended remediation by applying patches for the impacted version: For ESXi For ESXi version 6.5 apply ESXi 6.5 P06 For ESXi version 6.7 apply ESXi 6.7 EP 18 For ESXi version 7.0 apply ESXi 7.0 Update 1d For vSphere Client For vCenter 6.5 version apply vCenter Server 6.5 Update 3n or vCenter Server Appliance 6.5 Update 3n (VCSA) For vCenter 6.7 version apply vCenter Server 6.7 Update 3l or vCenter Server Appliance 6.7 Update 3l (VCSA) For vCenter 7.0 version apply the manual workaround as suggested in https://kb.vmware.com/s/article/82374 IMPORTANT: Please refer to the HPE SimpliVity OmniStack Interoperability Guide for the latest firmware and software policies, hypervisor guidelines and supported upgrade paths. HISTORY Version:1 (rev.1) - 7 April 2021 Initial release Version:2 (rev.2) - 15 April 2021 clarified resolution text Third Party Security Patches: Third party security patches that are to be installed on systems running Hewlett Packard Enterprise (HPE) software products should be applied in accordance with the customer's patch management policy. Support: For issues about implementing the recommendations of this Security Bulletin, contact normal HPE Services support channel. For other issues about the content of this Security Bulletin, send e-mail to security-alert@hpe.com. Report: To report a potential security vulnerability for any HPE supported product: Web Form: https://www.hpe.com/info/report-security-vulnerability Email: security-alert@hpe.com Hewlett Packard Enterprise Product Security Response Policy: https://support.hpe.com/hpesc/public/docDisplay?docLocale=en_US&docId=a00100637en_us Subscribe: To initiate a subscription to receive future HPE Security Bulletin alerts via Email: http://www.hpe.com/support/Subscriber_Choice Security Bulletin Archive: A list of recently released Security Bulletins is available here: http://www.hpe.com/support/Security_Bulletin_Archive