ESXi 6.5 / 6.7 / 7.0 RCE (VMSA-2021-0002)

high Nessus Plugin ID 146827
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

The remote VMware ESXi host is missing a security patch and is affected by a remote code execution vulnerability.

Description

The remote VMware ESXi host is version 6.5, 6.7 or 7.0 and is affected by a remote code execution vulnerability. OpenSLP as used in ESXi (7.0 before ESXi70U1c-17325551, 6.7 before ESXi670-202102401-SG, 6.5 before ESXi650-202102101-SG) has a heap-overflow vulnerability. A malicious actor residing within the same network segment as ESXi who has access to port 427 may be able to trigger the heap-overflow issue in OpenSLP service resulting in remote code execution.

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

Solution

Apply the appropriate patch as referenced in the vendor advisory.

See Also

https://www.vmware.com/security/advisories/VMSA-2021-0002.html

http://www.nessus.org/u?090c6180

Plugin Details

Severity: High

ID: 146827

File Name: vmware_esxi_vmsa-2021-0002.nasl

Version: 1.6

Type: remote

Family: Misc.

Published: 2/25/2021

Updated: 6/7/2021

Dependencies: vmware_vsphere_detect.nbin

Configuration: Enable paranoid mode

Risk Information

CVSS Score Source: CVE-2021-21974

VPR

Risk Factor: High

Score: 8.4

CVSS v2

Risk Factor: Medium

Base Score: 5.8

Temporal Score: 4.5

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

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

CVSS v3

Risk Factor: High

Base Score: 8.8

Temporal Score: 7.9

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

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

Vulnerability Information

CPE: cpe:/o:vmware:esxi

Required KB Items: Host/VMware/version, Host/VMware/release, Settings/ParanoidReport

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 2/23/2021

Vulnerability Publication Date: 2/23/2021

Reference Information

CVE: CVE-2021-21974

IAVA: 2021-A-0109