CVE-2020-2016

PAN-OS: Temporary file race condition vulnerability in PAN-OS leads to local privilege escalation

Severity Score

7.0

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

A race condition due to insecure creation of a file in a temporary directory vulnerability in PAN-OS allows for root privilege escalation from a limited linux user account. This allows an attacker who has escaped the restricted shell as a low privilege administrator, possibly by exploiting another vulnerability, to escalate privileges to become root user. This issue affects: PAN-OS 7.1 versions earlier than 7.1.26; PAN-OS 8.1 versions earlier than 8.1.13; PAN-OS 9.0 versions earlier than 9.0.6; All versions of PAN-OS 8.0.

Una condición de carrera debido a la creación no segura de un archivo en una vulnerabilidad de directorio temporal en PAN-OS permite la escalada de privilegios raíz desde una cuenta de usuario de Linux limitada. Esto permite que un atacante que haya escapado del shell restringido como administrador de bajos privilegios, posiblemente explotando otra vulnerabilidad, escale privilegios para convertirse en usuario root. Este problema afecta: PAN-OS 7.1 versiones anteriores a la versión 7.1.26; PAN-OS 8.1 versiones anteriores a la versión 8.1.13; PAN-OS 9.0 versiones anteriores a la versión 9.0.6; Todas las versiones de PAN-OS 8.0.

*Credits: Palo Alto Networks thanks the UK's National Cyber Security Centre (NCSC) for discovering and reporting this issue., Palo Alto Networks thanks the NCC Group for finding this issue independently during a contracted PAN-OS security assessment.

Attack Vector

Local

Attack Complexity

High

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Network

Attack Complexity

Medium

Authentication

Single

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
2020-05-13 CVE Published
2023-03-08 EPSS Updated
2024-09-16 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
CWE-377: Insecure Temporary File

CAPEC

References (1)

URL	Tag	Source

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
https://security.paloaltonetworks.com/CVE-2020-2016	2020-05-15

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"				>= 7.1.0 < 7.1.26 Search vendor "Paloaltonetworks" for product "Pan-os" and version " >= 7.1.0 < 7.1.26"		-		Affected
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 < 8.1.13 Search vendor "Paloaltonetworks" for product "Pan-os" and version " >= 8.1.0 < 8.1.13"		-		Affected
Paloaltonetworks Search vendor "Paloaltonetworks"		Pan-os Search vendor "Paloaltonetworks" for product "Pan-os"				>= 9.0.0 < 9.0.6 Search vendor "Paloaltonetworks" for product "Pan-os" and version " >= 9.0.0 < 9.0.6"		-		Affected