CVE-2020-2033

GlobalProtect App: Missing certificate validation vulnerability can disclose pre-logon authentication cookie

Severity Score

5.3

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

When the pre-logon feature is enabled, a missing certification validation in Palo Alto Networks GlobalProtect app can disclose the pre-logon authentication cookie to a man-in-the-middle attacker on the same local area network segment with the ability to manipulate ARP or to conduct ARP spoofing attacks. This allows the attacker to access the GlobalProtect Server as allowed by configured Security rules for the 'pre-login' user. This access may be limited compared to the network access of regular users. This issue affects: GlobalProtect app 5.0 versions earlier than GlobalProtect app 5.0.10 when the prelogon feature is enabled; GlobalProtect app 5.1 versions earlier than GlobalProtect app 5.1.4 when the prelogon feature is enabled.

Cuando la funcionalidad pre-logon está habilitada, una falta de comprobación de certificación en la aplicación GlobalProtect de Palo Alto Networks puede revelar la cookie de autenticación de pre-logon a un atacante de tipo man-in-the-middle en el mismo segmento de red de área local con la capacidad de manipular ARP o conducir ataques de suplantación de identidad de ARP. Esto permite al atacante acceder al servidor GlobalProtect de acuerdo a lo permitido por las reglas de seguridad configuradas para el usuario "pre-login". Este acceso puede ser limitado comparado con el acceso a la red de los usuarios habituales. Este problema afecta a: la aplicación GlobalProtect versiones 5.0 anteriores a la aplicación GlobalProtect versión 5.0.10 cuando la función de inicio de sesión está habilitada; La aplicación GlobalProtect versiones 5.1 anteriores a la aplicación GlobalProtect versión 5.1.4, cuando la funcionalidad pre-logon está habilitada

*Credits: Palo Alto Networks thanks Tom Wyckhuys and Nabeel Ahmed from NTT Belgium for discovering and reporting this issue.

Attack Vector

Adjacent

Attack Complexity

High

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

None

Attack Vector

Adjacent

Attack Complexity

Medium

Authentication

None

Confidentiality

Partial

Integrity

None

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2019-12-04 CVE Reserved
2020-06-10 CVE Published
2023-03-08 EPSS Updated
2024-09-17 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-290: Authentication Bypass by Spoofing
CWE-295: Improper Certificate Validation

CAPEC

References (1)

URL	Tag	Source

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
https://security.paloaltonetworks.com/CVE-2020-2033	2020-06-16

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Paloaltonetworks Search vendor "Paloaltonetworks"		Globalprotect Search vendor "Paloaltonetworks" for product "Globalprotect"				>= 5.0.0 < 5.0.10 Search vendor "Paloaltonetworks" for product "Globalprotect" and version " >= 5.0.0 < 5.0.10"		windows		Affected
Paloaltonetworks Search vendor "Paloaltonetworks"		Globalprotect Search vendor "Paloaltonetworks" for product "Globalprotect"				>= 5.1.0 < 5.1.4 Search vendor "Paloaltonetworks" for product "Globalprotect" and version " >= 5.1.0 < 5.1.4"		windows		Affected