Xen Hypervisor Pin Count / Page Reference Grant Table Code Guest-to-Host Memory Corruption (XSA-236)

critical Nessus Plugin ID 104214

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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 memory corruption vulnerability. This may allow an attacker on the guest to cause a denial of service or gain elevated privileges on the host.

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.

Plugin Details

Severity: Critical

ID: 104214

File Name: xen_server_XSA-236.nasl

Version: 1.7

Type: local

Family: Misc.

Published: 10/27/2017

Updated: 6/3/2021

Configuration: Enable paranoid mode

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.5

CVSS v2

Risk Factor: High

Base Score: 9

Temporal Score: 6.7

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

CVSS Score Source: CVE-2017-15597

CVSS v3

Risk Factor: Critical

Base Score: 9.1

Temporal Score: 7.9

Vector: CVSS:3.0/AV:N/AC:L/PR:H/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:/o:xen:xen

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

Exploit Ease: No known exploits are available

Patch Publication Date: 10/24/2017

Vulnerability Publication Date: 10/24/2017

Reference Information

CVE: CVE-2017-15597

BID: 101564

IAVB: 2017-B-0148-S

Detections

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