Xen Device Quarantine for Alternate PCI Assignment Methods Privilege Escalation Vulnerability (XSA-306)

medium Nessus Plugin ID 134171

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Synopsis

The remote Xen hypervisor installation is missing a security update.

Description

According to its self-reported version number, the Xen hypervisor installed on the remote host is affected by a privilege escalation vulnerability due to an incomplete fix for CVE-2019-18424. An unauthenticated attacker with physical access to the device can exploit this issue, via an untrusted domain with access to a physical device to DMA into the host memory and potentially gain elevated privileges.

Solution

Apply the appropriate patch according to the vendor advisory.

Plugin Details

Severity: Medium

ID: 134171

File Name: xen_server_XSA-306.nasl

Version: 1.4

Type: local

Family: Misc.

Published: 3/2/2020

Updated: 1/14/2021

Configuration: Enable paranoid mode

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 5.9

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-2019-19579

CVSS v3

Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5.9

Vector: CVSS:3.0/AV:P/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:xen:xen

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

Exploit Ease: No known exploits are available

Patch Publication Date: 11/26/2019

Vulnerability Publication Date: 11/26/2019

Reference Information

CVE: CVE-2019-19579

IAVB: 2019-B-0084-S

Detections

Analytics