VMware vCenter Server 5.5.x / 6.0.x / 6.5.x / 6.7.x Speculative Execution Side Channel Vulnerability (Foreshadow) (VMSA-2018-0020)

medium Nessus Plugin ID 111760
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.


A virtualization management application installed on the remote host is affected by a speculative execution side channel vulnerability.


The version of VMware vCenter Server installed on the remote host is 5.5.x prior to 5.5u3j, 6.0.x prior to 6.0u3h, 6.5.x prior to 6.5u2c, or 6.7.x prior to 6.7.0d. It is, therefore, affected by a speculative execution side channel attack known as L1 Terminal Fault (L1TF). An attacker who successfully exploited L1TF may be able to read privileged data across trust boundaries.


Upgrade to the version, or later, referenced in the vendor advisory.

See Also



Plugin Details

Severity: Medium

ID: 111760

File Name: vmware_vcenter_vmsa-2018-0020.nasl

Version: 1.12

Type: remote

Family: Misc.

Published: 8/15/2018

Updated: 4/27/2020

Dependencies: vmware_vcenter_detect.nbin

Risk Information

CVSS Score Source: CVE-2018-3646


Risk Factor: Medium

Score: 5.2


Risk Factor: Medium

Base Score: 4.7

Temporal Score: 3.5

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

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


Risk Factor: Medium

Base Score: 5.6

Temporal Score: 4.9

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

Temporal Vector: E:U/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 Ease: No known exploits are available

Patch Publication Date: 8/14/2018

Vulnerability Publication Date: 8/14/2018

Reference Information

CVE: CVE-2018-3646

BID: 105080

VMSA: 2018-0020