ESXi 6.5 / 6.7 XSS (VMSA-2020-0008)

critical Nessus Plugin ID 138475

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Synopsis

The remote VMware ESXi host is missing a security patch and is affected by a cross-site scripting (XSS) vulnerability.

Description

The remote VMware ESXi host is version 6.5 or 6.7 and is affected by a cross-site scripting (XSS) vulnerability in virtual machine attributes due to improper validation of user-supplied input before returning it to users. An authenticated, remote attacker with access to modify the system properties of a virtual machine from inside the guest OS can exploit this, by inserting script-related HTML in the system properties and having a user view the system properties from the ESXi Host Client, to execute arbitrary script code in a user's ESXi Host Client session.

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: 138475

File Name: vmware_esxi_VMSA-2020-0008.nasl

Version: 1.4

Type: remote

Family: Misc.

Published: 7/15/2020

Updated: 1/4/2021

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.3

CVSS v2

Risk Factor: Medium

Base Score: 4.3

Temporal Score: 3.2

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

CVSS Score Source: CVE-2020-3955

CVSS v3

Risk Factor: Critical

Base Score: 9.3

Temporal Score: 8.1

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

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

Vulnerability Information

CPE: cpe:/o:vmware:esxi

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

Exploit Ease: No known exploits are available

Patch Publication Date: 4/28/2020

Vulnerability Publication Date: 4/28/2020

Reference Information

CVE: CVE-2020-3955

IAVA: 2020-A-0193-S

VMSA: 2020-0008

Detections

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