VMware vCenter Server 6.5 / 6.7 / 7.0 Multiple Vulnerabilities (VMSA-2021-0010)

critical Nessus Plugin ID 149902
New! Plugin Severity Now Using CVSS v3

The calculated severity for Plugins has been updated to use CVSS v3 by default. Plugins that do not have a CVSS v3 score will fall back to CVSS v2 for calculating severity. Severity display preferences can be toggled in the settings dropdown.

Synopsis

A virtualization management application installed on the remote host is affected by multiple vulnerabilities.

Description

The version of VMware vCenter Server installed on the remote host is 6.5 prior to 6.5 U3p, 6.7 prior to 6.7 U3n or 7.0 prior to 7.0 U2b. It is, therefore, affected by multiple vulnerabilities:

- The vSphere Client (HTML5) contains a remote code execution vulnerability due to lack of input validation in the Virtual SAN Health Check plug-in which is enabled by default in 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-2021-21985)

- The vSphere Client (HTML5) contains a vulnerability in a vSphere authentication mechanism for the Virtual SAN Health Check, Site Recovery, vSphere Lifecycle Manager, and VMware Cloud Director Availability plug-ins. A malicious actor with network access to port 443 on vCenter Server may perform actions allowed by the impacted plug-ins without authentication. (CVE-2021-21986)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number. Nessus has also not tested for the presence of a workaround.

Solution

Upgrade to VMware vCenter Server 6.5 U3p, 6.7 U3n, 7.0 U2b or later or apply the workaround mentioned in the advisory.

See Also

https://www.vmware.com/security/advisories/VMSA-2021-0010.html

https://blogs.vmware.com/vsphere/2021/05/vmsa-2021-0010.html

Plugin Details

Severity: Critical

ID: 149902

File Name: vmware_vcenter_vmsa-2021-0010.nasl

Version: 1.7

Type: remote

Family: Misc.

Published: 5/25/2021

Updated: 11/30/2021

Dependencies: vmware_vcenter_detect.nbin

Risk Information

CVSS Score Source: CVE-2021-21985

VPR

Risk Factor: Critical

Score: 9.6

CVSS v2

Risk Factor: Critical

Base Score: 10

Temporal Score: 8.3

Vector: AV:N/AC:L/Au:N/C:C/I:C/A:C

Temporal Vector: E:F/RL:OF/RC:C

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 9.1

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: E:F/RL:O/RC:C

Vulnerability Information

CPE: cpe:/a:vmware:vcenter_server

Required KB Items: Host/VMware/vCenter, Host/VMware/version, Host/VMware/release

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 5/25/2021

Vulnerability Publication Date: 5/25/2021

Exploitable With

Metasploit (VMware vCenter Server Virtual SAN Health Check Plugin RCE)

Reference Information

CVE: CVE-2021-21985, CVE-2021-21986

IAVA: 2021-A-0254