ESXi 6.5 / 6.7 / 7.0 Multiple Vulnerabilities (VMSA-2021-0014)

critical Nessus Plugin ID 151665

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Synopsis

The remote VMware ESXi host is missing a security patch and is affected by multiple vulnerabilities.

Description

The remote VMware ESXi host is version 6.5, 6.7 or 7.0 and is affected by multiple vulnerabilities:

- SFCB (Small Footprint CIM Broker) as used in ESXi has an authentication bypass vulnerability. A malicious actor with network access to port 5989 on ESXi may exploit this issue to bypass SFCB authentication by sending a specially crafted request. (CVE-2021-21994)

- OpenSLP as used in ESXi has a denial-of-service vulnerability due a heap out-of-bounds read issue. A malicious actor with network access to port 427 on ESXi may be able to trigger a heap out-of-bounds read in OpenSLP service resulting in a denial-of-service condition. (CVE-2021-21995)

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.

Plugin Details

Severity: Critical

ID: 151665

File Name: vmware_esxi_vmsa-2021-0014.nasl

Version: 1.4

Type: remote

Family: Misc.

Published: 7/15/2021

Updated: 5/22/2023

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 5.9

CVSS v2

Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5

Vector: CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:P

CVSS Score Source: CVE-2021-21994

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.5

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

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/o:vmware:esxi

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

Exploit Ease: No known exploits are available

Patch Publication Date: 3/9/2021

Vulnerability Publication Date: 7/13/2021

Reference Information

CVE: CVE-2021-21994, CVE-2021-21995

IAVA: 2021-A-0312

Detections

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