CVE-2021-3055

PAN-OS: XML External Entity (XXE) Reference Vulnerability in the PAN-OS Web Interface

Severity Score

6.5

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

An improper restriction of XML external entity (XXE) reference vulnerability in the Palo Alto Networks PAN-OS web interface enables an authenticated administrator to read any arbitrary file from the file system and send a specifically crafted request to the firewall that causes the service to crash. 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. This issue impacts: PAN-OS 8.1 versions earlier than PAN-OS 8.1.20; PAN-OS 9.0 versions earlier than PAN-OS 9.0.14; PAN-OS 9.1 versions earlier than PAN-OS 9.1.10; PAN-OS 10.0 versions earlier than PAN-OS 10.0.6. This issue does not affect Prisma Access.

Una vulnerabilidad de restricción inapropiada de tipo XML external entity (XXE) en la interfaz web de Palo Alto Networks PAN-OS permite a un administrador autenticado leer cualquier archivo arbitrario del sistema de archivos y enviar una petición específicamente diseñada al firewall que cause el bloqueo del servicio. Los intentos repetidos de enviar esta petición resultarán en una denegación de servicio de todos los servicios de PAN-OS, al reiniciar el dispositivo y poniéndolo en modo de mantenimiento. Este problema afecta a: PAN-OS versión 8.1 anteriores a PAN-OS 8.1.20; PAN-OS versión 9.0 anteriores a PAN-OS 9.0.14; PAN-OS versión 9.1 anteriores a PAN-OS 9.1.10; PAN-OS versión 10.0 anteriores a PAN-OS 10.0.6. Este problema no afecta a Prisma Access

*Credits: This issue was found by a customer of Palo Alto Networks during a security review.

Attack Vector

Network

Attack Complexity

Low

Privileges Required

High

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

High

Attack Vector

Network

Attack Complexity

Low

Authentication

Single

Confidentiality

Partial

Integrity

None

Availability

Complete

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2021-01-06 CVE Reserved
2021-09-08 CVE Published
2023-04-01 EPSS Updated
2024-09-17 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-611: Improper Restriction of XML External Entity Reference

CAPEC

References (1)

URL	Tag	Source

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
https://security.paloaltonetworks.com/CVE-2021-3055	2021-09-15

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Paloaltonetworks Search vendor "Paloaltonetworks"		Pan-os Search vendor "Paloaltonetworks" for product "Pan-os"				>= 8.1.0 < 8.1.20 Search vendor "Paloaltonetworks" for product "Pan-os" and version " >= 8.1.0 < 8.1.20"		-		Affected
Paloaltonetworks Search vendor "Paloaltonetworks"		Pan-os Search vendor "Paloaltonetworks" for product "Pan-os"				>= 9.0.0 < 9.0.14 Search vendor "Paloaltonetworks" for product "Pan-os" and version " >= 9.0.0 < 9.0.14"		-		Affected
Paloaltonetworks Search vendor "Paloaltonetworks"		Pan-os Search vendor "Paloaltonetworks" for product "Pan-os"				>= 9.1.0 < 9.1.10 Search vendor "Paloaltonetworks" for product "Pan-os" and version " >= 9.1.0 < 9.1.10"		-		Affected
Paloaltonetworks Search vendor "Paloaltonetworks"		Pan-os Search vendor "Paloaltonetworks" for product "Pan-os"				>= 10.0.0 < 10.0.6 Search vendor "Paloaltonetworks" for product "Pan-os" and version " >= 10.0.0 < 10.0.6"		-		Affected