Palo Alto Networks PAN-OS 8.1.x < 8.1.21 / 9.0.x < 9.0.14-h4 / 9.1.x < 9.1.11-h3 / 10.0.x < 10.0.8-h4 / 10.1.x < 10.1.3 Vulnerability

high Nessus Plugin ID 155597


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 8.1.21 or 9.0.x prior to 9.0.14-h4 or 9.1.x prior to 9.1.11-h3 or 10.0.x prior to 10.0.8-h4 or 10.1.x prior to 10.1.3. It is, therefore, affected by a vulnerability.

- An improper handling of exceptional conditions vulnerability exists in Palo Alto Networks GlobalProtect portal and gateway interfaces that enables an unauthenticated network-based attacker to send specifically crafted traffic to a GlobalProtect interface that causes the service to stop responding. Repeated attempts to send this request result in denial of service to all PAN-OS services by restarting the device and putting it into maintenance mode. (CVE-2021-3063)

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 8.1.21 / 9.0.14-h4 / 9.1.11-h3 / 10.0.8-h4 / 10.1.3 or later

See Also

Plugin Details

Severity: High

ID: 155597

File Name: palo_alto_CVE-2021-3063.nasl

Version: 1.4

Type: combined

Published: 11/18/2021

Updated: 5/26/2022

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-2021-3063


Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

Vector: CVSS:3.0/AV:N/AC:L/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: Settings/ParanoidReport, Host/Palo_Alto/Firewall/Version, Host/Palo_Alto/Firewall/Full_Version, Host/Palo_Alto/Firewall/Source

Exploit Ease: No known exploits are available

Patch Publication Date: 11/10/2021

Vulnerability Publication Date: 11/10/2021

Reference Information

CVE: CVE-2021-3063

CWE: 755

IAVA: 2021-A-0552-S