Xen 32-bit Arm Guest OS Denial Of Service vulnerability (XSA-307)

medium Nessus Plugin ID 132343

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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 denial of service vulnerability due to a mishandling of a certain bit iteration in 32-bit Arm systems. An authenticated local attacker can exploit this issue, to cause a denial of service (DOS).

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 appropiate patch according to the vendor advisory.

Plugin Details

Severity: Medium

ID: 132343

File Name: xen_server_XSA-307.nasl

Version: 1.4

Type: local

Family: Misc.

Published: 12/20/2019

Updated: 4/2/2024

Configuration: Enable paranoid mode

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

CVSS v2

Risk Factor: Low

Base Score: 2.1

Temporal Score: 1.6

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

CVSS Score Source: CVE-2019-19582

CVSS v3

Risk Factor: Medium

Base Score: 6.5

Temporal Score: 5.7

Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/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: 12/11/2019

Vulnerability Publication Date: 12/11/2019

Reference Information

CVE: CVE-2019-19581, CVE-2019-19582

IAVB: 2019-B-0091-S

Detections

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