CVE-2021-21991

high
New! CVE Severity Now Using CVSS v3

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

Description

The vCenter Server contains a local privilege escalation vulnerability due to the way it handles session tokens. A malicious actor with non-administrative user access on vCenter Server host may exploit this issue to escalate privileges to Administrator on the vSphere Client (HTML5) or vCenter Server vSphere Web Client (FLEX/Flash).

References

https://www.vmware.com/security/advisories/VMSA-2021-0020.html

Details

Source: MITRE

Published: 2021-09-22

Updated: 2021-10-05

Type: CWE-269

Risk Information

CVSS v2

Base Score: 4.6

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

Impact Score: 6.4

Exploitability Score: 3.9

Severity: MEDIUM

CVSS v3

Base Score: 7.8

Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Impact Score: 5.9

Exploitability Score: 1.8

Severity: HIGH

Vulnerable Software

Configuration 1

OR

cpe:2.3:a:vmware:cloud_foundation:*:*:*:*:*:*:*:*

cpe:2.3:a:vmware:cloud_foundation:*:*:*:*:*:*:*:*

cpe:2.3:a:vmware:vcenter_server:6.5:-:*:*:*:*:*:*

cpe:2.3:a:vmware:vcenter_server:6.5:a:*:*:*:*:*:*

cpe:2.3:a:vmware:vcenter_server:6.5:b:*:*:*:*:*:*

cpe:2.3:a:vmware:vcenter_server:6.5:c:*:*:*:*:*:*

cpe:2.3:a:vmware:vcenter_server:6.5:d:*:*:*:*:*:*

cpe:2.3:a:vmware:vcenter_server:6.5:e:*:*:*:*:*:*

cpe:2.3:a:vmware:vcenter_server:6.5:f:*:*:*:*:*:*

cpe:2.3:a:vmware:vcenter_server:6.5:update1:*:*:*:*:*:*

cpe:2.3:a:vmware:vcenter_server:6.5:update1b:*:*:*:*:*:*

cpe:2.3:a:vmware:vcenter_server:6.5:update1c:*:*:*:*:*:*

cpe:2.3:a:vmware:vcenter_server:6.5:update1d:*:*:*:*:*:*

cpe:2.3:a:vmware:vcenter_server:6.5:update1e:*:*:*:*:*:*

cpe:2.3:a:vmware:vcenter_server:6.5:update1g:*:*:*:*:*:*

cpe:2.3:a:vmware:vcenter_server:6.5:update2:*:*:*:*:*:*

cpe:2.3:a:vmware:vcenter_server:6.5:update2b:*:*:*:*:*:*

cpe:2.3:a:vmware:vcenter_server:6.5:update2c:*:*:*:*:*:*

cpe:2.3:a:vmware:vcenter_server:6.5:update2d:*:*:*:*:*:*

cpe:2.3:a:vmware:vcenter_server:6.5:update2g:*:*:*:*:*:*

cpe:2.3:a:vmware:vcenter_server:6.5:update3:*:*:*:*:*:*

cpe:2.3:a:vmware:vcenter_server:6.5:update3d:*:*:*:*:*:*

cpe:2.3:a:vmware:vcenter_server:6.5:update3f:*:*:*:*:*:*

cpe:2.3:a:vmware:vcenter_server:6.5:update3k:*:*:*:*:*:*

cpe:2.3:a:vmware:vcenter_server:6.5:update3n:*:*:*:*:*:*

cpe:2.3:a:vmware:vcenter_server:6.5:update3p:*:*:*:*:*:*

cpe:2.3:a:vmware:vcenter_server:6.7:*:*:*:*:*:*:*

cpe:2.3:a:vmware:vcenter_server:6.7:-:*:*:*:*:*:*

cpe:2.3:a:vmware:vcenter_server:6.7:a:*:*:*:*:*:*

cpe:2.3:a:vmware:vcenter_server:6.7:b:*:*:*:*:*:*

cpe:2.3:a:vmware:vcenter_server:6.7:d:*:*:*:*:*:*

cpe:2.3:a:vmware:vcenter_server:6.7:update1:*:*:*:*:*:*

cpe:2.3:a:vmware:vcenter_server:6.7:update1b:*:*:*:*:*:*

cpe:2.3:a:vmware:vcenter_server:6.7:update2:*:*:*:*:*:*

cpe:2.3:a:vmware:vcenter_server:6.7:update2a:*:*:*:*:*:*

cpe:2.3:a:vmware:vcenter_server:6.7:update2c:*:*:*:*:*:*

cpe:2.3:a:vmware:vcenter_server:6.7:update3:*:*:*:*:*:*

cpe:2.3:a:vmware:vcenter_server:6.7:update3a:*:*:*:*:*:*

cpe:2.3:a:vmware:vcenter_server:6.7:update3b:*:*:*:*:*:*

cpe:2.3:a:vmware:vcenter_server:6.7:update3f:*:*:*:*:*:*

cpe:2.3:a:vmware:vcenter_server:6.7:update3g:*:*:*:*:*:*

cpe:2.3:a:vmware:vcenter_server:6.7:update3j:*:*:*:*:*:*

cpe:2.3:a:vmware:vcenter_server:6.7:update3l:*:*:*:*:*:*

cpe:2.3:a:vmware:vcenter_server:6.7:update3m:*:*:*:*:*:*

cpe:2.3:a:vmware:vcenter_server:6.7:update3n:*:*:*:*:*:*

cpe:2.3:a:vmware:vcenter_server:7.0:-:*:*:*:*:*:*

cpe:2.3:a:vmware:vcenter_server:7.0:a:*:*:*:*:*:*

cpe:2.3:a:vmware:vcenter_server:7.0:b:*:*:*:*:*:*

cpe:2.3:a:vmware:vcenter_server:7.0:c:*:*:*:*:*:*

cpe:2.3:a:vmware:vcenter_server:7.0:d:*:*:*:*:*:*

cpe:2.3:a:vmware:vcenter_server:7.0:update1:*:*:*:*:*:*

cpe:2.3:a:vmware:vcenter_server:7.0:update1a:*:*:*:*:*:*

cpe:2.3:a:vmware:vcenter_server:7.0:update1c:*:*:*:*:*:*

cpe:2.3:a:vmware:vcenter_server:7.0:update1d:*:*:*:*:*:*

cpe:2.3:a:vmware:vcenter_server:7.0:update2:*:*:*:*:*:*

cpe:2.3:a:vmware:vcenter_server:7.0:update2a:*:*:*:*:*:*

cpe:2.3:a:vmware:vcenter_server:7.0:update2b:*:*:*:*:*:*

Tenable Plugins

View all (3 total)

IDNameProductFamilySeverity
153547VMware vCenter Server < 6.5 U3q Multiple Vulnerabilities (VMSA-2021-0020)NessusMisc.
high
153545VMware vCenter Server < 7.0 U2c Multiple Vulnerabilities (VMSA-2021-0020)NessusMisc.
high
153544VMware vCenter Server < 6.7 Multiple Vulnerabilities (VMSA-2021-0020)NessusMisc.
high