Xen Project Microarchitectural Data Sampling Speculative Side-Channel Vulnerabilities (MDSUM/RIDL) (MFBDS/RIDL/ZombieLoad) (MLPDS/RIDL) (MSBDS/Fallout) (XSA-297)

medium Nessus Plugin ID 125389
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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 microarchitectural data sampling speculative side-channel vulnerabilities. These vulnerabilities may allow a local attacker on a guest machine to sample the contents of memory reads and writes. Only a subset of Intel x86 processors are affected.

Note that Nessus has checked the changeset versions based on the xen.git change log. Nessus did not check guest hardware configurations or if patches were applied manually to the source code before a recompile and reinstall.

Solution

Apply the appropriate patch according to the vendor advisory.

See Also

https://xenbits.xen.org/xsa/advisory-297.html

https://xenbits.xen.org/gitweb/?p=xen.git;a=summary

Plugin Details

Severity: Medium

ID: 125389

File Name: xen_server_XSA-297.nasl

Version: 1.3

Type: local

Family: Misc.

Published: 5/24/2019

Updated: 7/10/2020

Dependencies: xen_server_detect.nbin

Configuration: Enable paranoid mode

Risk Information

CVSS Score Source: CVE-2019-11091

VPR

Risk Factor: High

Score: 7.7

CVSS v2

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

CVSS v3

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:/o:xen:xen

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

Exploit Ease: No known exploits are available

Patch Publication Date: 5/14/2019

Vulnerability Publication Date: 5/14/2019

Reference Information

CVE: CVE-2018-12126, CVE-2018-12127, CVE-2018-12130, CVE-2019-11091

BID: 108330

IAVA: 2019-A-0168-S