Xen Platypus information leak via power sidechannel (XSA-351)

medium Nessus Plugin ID 142889

Synopsis

The remote Xen hypervisor installation is missing a security update.

Description

An information disclosure vulnerability exists in power/energy monitoring interfaces, which can be used to create covert channels and infer the operations and data used by other contexts within the system.

Solution

Apply the appropriate patch according to the vendor advisory.

See Also

https://xenbits.xen.org/xsa/advisory-351.html

https://platypusattack.com/

http://www.nessus.org/u?4153ee20

Plugin Details

Severity: Medium

ID: 142889

File Name: xen_server_XSA-351.nasl

Version: 1.4

Type: local

Family: Misc.

Published: 11/13/2020

Updated: 1/4/2021

Configuration: Enable paranoid mode

Risk Information

CVSS Score Source: CVE-2020-28368

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: Low

Base Score: 2.1

Temporal Score: 1.6

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

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

CVSS v3

Risk Factor: Medium

Base Score: 4.4

Temporal Score: 3.9

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

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

Vulnerability Information

CPE: cpe:/o:xen:xen

Required KB Items: installed_sw/Xen Hypervisor, Settings/ParanoidReport

Exploit Ease: No known exploits are available

Patch Publication Date: 11/10/2020

Vulnerability Publication Date: 11/10/2020

Reference Information

CVE: CVE-2020-28368

IAVB: 2020-B-0066