CVE-2020-2040

PAN-OS: Buffer overflow when Captive Portal or Multi-Factor Authentication (MFA) is enabled

Severity Score

9.8

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

A buffer overflow vulnerability in PAN-OS allows an unauthenticated attacker to disrupt system processes and potentially execute arbitrary code with root privileges by sending a malicious request to the Captive Portal or Multi-Factor Authentication interface. This issue impacts: All versions of PAN-OS 8.0; PAN-OS 8.1 versions earlier than PAN-OS 8.1.15; PAN-OS 9.0 versions earlier than PAN-OS 9.0.9; PAN-OS 9.1 versions earlier than PAN-OS 9.1.3.

Una vulnerabilidad de desbordamiento de búfer en PAN-OS permite a un atacante no autenticado interrumpir los procesos del sistema y potencialmente ejecutar código arbitrario con privilegios root al enviar una petición maliciosa al portal cautivo o la interfaz de autenticación multifactor. Este problema impacta a: todas las Versiones PAN-OS 8.0; Versiones PAN-OS 8.1 anteriores a PAN-OS 8.1.15; Versiones PAN-OS 9.0 anteriores a PAN-OS 9.0.9; Versiones PAN-OS 9.1 anteriores a PAN-OS 9.1.3.

*Credits: This issue was found by Yamata Li of Palo Alto Networks during internal security review.

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Network

Attack Complexity

Low

Authentication

None

Confidentiality

Complete

Integrity

Complete

Availability

Complete

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2019-12-04 CVE Reserved
2020-09-09 CVE Published
2024-09-16 CVE Updated
2024-10-19 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-120: Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')

CAPEC

References (1)

URL	Tag	Source

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
https://security.paloaltonetworks.com/CVE-2020-2040	2020-09-15

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"				>= 8.0.0 <= 8.0.20 Search vendor "Paloaltonetworks" for product "Pan-os" and version " >= 8.0.0 <= 8.0.20"		-		Affected
Paloaltonetworks Search vendor "Paloaltonetworks"		Pan-os Search vendor "Paloaltonetworks" for product "Pan-os"				>= 8.1.0 < 8.1.15 Search vendor "Paloaltonetworks" for product "Pan-os" and version " >= 8.1.0 < 8.1.15"		-		Affected
Paloaltonetworks Search vendor "Paloaltonetworks"		Pan-os Search vendor "Paloaltonetworks" for product "Pan-os"				>= 9.0.0 < 9.0.9 Search vendor "Paloaltonetworks" for product "Pan-os" and version " >= 9.0.0 < 9.0.9"		-		Affected
Paloaltonetworks Search vendor "Paloaltonetworks"		Pan-os Search vendor "Paloaltonetworks" for product "Pan-os"				>= 9.1.0 < 9.1.3 Search vendor "Paloaltonetworks" for product "Pan-os" and version " >= 9.1.0 < 9.1.3"		-		Affected