Input validation error in vCenter Server and Cloud Foundation - CVE-2021-21972
Published: February 24, 2021 / Updated: May 18, 2022
Vulnerability identifier: #VU50898
CSH Severity: High
CVSS v4: 9.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2021-21972
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
The vulnerability is being exploited in the wild
Vulnerability details
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to insufficient validation of user-supplied input in vSphere Client. A remote non-authenticated attacker can send a specially crafted HTTP request to port 443/tcp and execute arbitrary code on the system.
Affected software
vCenter Server
Dell Enterprise Hybrid Cloud
Cloud Foundation
PowerFlex Appliance
PowerFlex rack
Dell EMC VxRail Appliance
Dell Enterprise Hybrid Cloud
Cloud Foundation
PowerFlex Appliance
PowerFlex rack
Dell EMC VxRail Appliance
How to mitigate CVE-2021-21972
Install updates from vendor's website.
vCenter Server - addressed in versions 6.5 U3n, 6.7 U3l, 7.0 U1c
Cloud Foundation - addressed in versions 3.10.1.2, 4.2
PowerFlex Appliance - addressed in versions Intelligent_Catalog_36_360_02_r1, Intelligent_Catalog_36_354_02_r4
PowerFlex rack - addressed in versions 3.3.9.2, 3.4.4.2, 3.5.4.2
Dell Enterprise Hybrid Cloud - update to 4.1.2
Dell EMC VxRail Appliance - addressed in versions 4.5.452, 4.7.525, 7.0.101
Cloud Foundation - addressed in versions 3.10.1.2, 4.2
PowerFlex Appliance - addressed in versions Intelligent_Catalog_36_360_02_r1, Intelligent_Catalog_36_354_02_r4
PowerFlex rack - addressed in versions 3.3.9.2, 3.4.4.2, 3.5.4.2
Dell Enterprise Hybrid Cloud - update to 4.1.2
Dell EMC VxRail Appliance - addressed in versions 4.5.452, 4.7.525, 7.0.101
Links to Public Exploits and PoC-codes
- Exploit #7859 - CVE-2021-21972 (VMware vCenter Server远程代码执行漏洞 (CVE-2021-21972)批量检测脚本) (May 18, 2022)
- Exploit #7207 - cve-2021-21972 () (December 27, 2021)
- Exploit #7098 - VMware_vCenter_UNAuthorized_RCE_CVE-2021-21972 (VMware vCenter 未授权RCE（CVE-2021-21972）) (November 29, 2021)
- Exploit #7036 - CVE-2021-21972 () (November 23, 2021)
- Exploit #6958 - vcenter_rce (漏洞利用，Vmware vCenter 6.5-7.0 RCE（CVE-2021-21972），上传冰蝎3，getshell) (October 29, 2021)
- Exploit #6752 - vcenter_rce (漏洞利用，Vmware vCenter 6.5-7.0 RCE（CVE-2021-21972），上传冰蝎3，getshell) (September 15, 2021)
- Exploit #6659 - cve-2021-21972 () (August 29, 2021)
- Exploit #6652 - CVE-2021-21972 (Nmap script to check vulnerability CVE-2021-21972) (August 23, 2021)
- Exploit #6642 - CVE-2021-21972 ([CVE-2021-21972] VMware vSphere Client Unauthorized File Upload to Remote Code Execution (RCE)) (August 19, 2021)
- Exploit #6577 - CVE-2021-21972 (CVE-2021-21972 vCenter-6.5-7.0 RCE POC) (July 29, 2021)
- Exploit #6567 - CVE-2021-21972 () (July 26, 2021)
- Exploit #6476 - VMware vCenter Server RCE 6.5 / 6.7 / 7.0 - Remote Code Execution (RCE) (Unauthenticated) (June 28, 2021)
- Exploit #5602 - VMware vCenter Server 7.0 - Unauthenticated File Upload (June 17, 2021)
- Exploit #5506 - CVE-2021-21972 (CVE-2021-21972) (May 30, 2021)
- Exploit #5503 - CVE-2021-21972 () (May 30, 2021)
- Exploit #5479 - CVE-2021-21972-vCenter-6.5-7.0-RCE-POC () (May 24, 2021)
- Exploit #5449 - CVE-2021-21972 (CVE-2021-21972 related vulnerability code) (May 20, 2021)
- Exploit #5421 - CVE-2021-21972 (CVE-2021-21972) (May 18, 2021)
- Exploit #5358 - VMware vCenter Server Unauthenticated OVA File Upload RCE (May 9, 2021)
- Exploit #5312 - vSphereyeeter (POC exploit for CVE-2021-21972) (April 23, 2021)
- Exploit #5191 - CVE-2021-21972 (CVE-2021-21972 Unauthorized RCE in VMware vCenter metasploit exploit script) (March 7, 2021)
- Exploit #5178 - VMware vCenter 6.5 / 7.0 Remote Code Execution Proof Of Concept (February 25, 2021)
- Exploit #5172 - CVE-2021-21972 (CVE-2021-21972 Exploit) (February 25, 2021)
- Exploit #5171 - CVE-2021-21972 (Proof of Concept Exploit for vCenter CVE-2021-21972) (February 25, 2021)