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Citrix XenServer Nested VT-x Instruction Guest-to-Host DoS (CTX239100)

high Nessus Plugin ID 118856

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Synopsis

A server virtualization platform installed on the remote host is missing a security patch.

Description

The version of Citrix XenServer running on the remote host is missing a security hotfix. It is, therefore, affected by by a guest-to-host denial of service vulnerability.

Solution

Apply the appropriate hotfix according to the vendor advisory.

See Also

https://support.citrix.com/article/CTX239100

Plugin Details

Severity: High

ID: 118856

File Name: citrix_xenserver_CTX239100.nasl

Version: 1.4

Type: local

Family: Misc.

Published: 11/9/2018

Updated: 11/1/2019

Configuration: Enable paranoid mode

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.5

CVSS v2

Risk Factor: High

Base Score: 7.2

Temporal Score: 5.3

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

CVSS Score Source: CVE-2018-18883

CVSS v3

Risk Factor: High

Base Score: 8.8

Temporal Score: 7.7

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

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

Vulnerability Information

CPE: cpe:/a:citrix:xenserver

Required KB Items: Host/local_checks_enabled, Settings/ParanoidReport, Host/XenServer/version

Exploit Ease: No known exploits are available

Patch Publication Date: 10/26/2018

Vulnerability Publication Date: 10/26/2018

Reference Information

CVE: CVE-2018-18883

BID: 105817