Palo Alto Networks PAN-OS 8.1.x < 8.1.22 / 9.0.x < 9.0.16 / 9.1.x < 9.1.13 / 10.0.x < 10.0.10 / 10.1.x < 10.1.5 Vulnerability

medium Nessus Plugin ID 159713


The remote PAN-OS host is affected by a vulnerability


The version of Palo Alto Networks PAN-OS running on the remote host is 8.1.x prior to 8.1.22 or 9.0.x prior to 9.0.16 or 9.1.x prior to 9.1.13 or 10.0.x prior to 10.0.10 or 10.1.x prior to 10.1.5. It is, therefore, affected by a vulnerability.

- An improper handling of exceptional conditions vulnerability exists in the DNS proxy feature of Palo Alto Networks PAN-OS software that enables a meddler-in-the-middle (MITM) to send specifically crafted traffic to the firewall that causes the service to restart unexpectedly. Repeated attempts to send this request result in denial-of-service to all PAN-OS services by restarting the device in maintenance mode.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.


Upgrade to PAN-OS 8.1.22 / 9.0.16 / 9.1.13 / 10.0.10 / 10.1.5 or later

See Also

Plugin Details

Severity: Medium

ID: 159713

File Name: palo_alto_CVE-2022-0023.nasl

Version: 1.3

Type: combined

Published: 4/13/2022

Updated: 4/26/2022

Configuration: Enable paranoid mode

Supported Sensors: Nessus

Risk Information


Risk Factor: Low

Score: 3.6


Risk Factor: Medium

Base Score: 4.3

Temporal Score: 3.2

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

CVSS Score Source: CVE-2022-0023


Risk Factor: Medium

Base Score: 5.9

Temporal Score: 5.2

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

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/o:paloaltonetworks:pan-os

Required KB Items: Host/Palo_Alto/Firewall/Version, Host/Palo_Alto/Firewall/Full_Version, Host/Palo_Alto/Firewall/Source, Settings/ParanoidReport

Exploit Ease: No known exploits are available

Patch Publication Date: 4/13/2022

Vulnerability Publication Date: 4/13/2022

Reference Information

CVE: CVE-2022-0023

CWE: 755