A Vulnerability in Palo Alto PAN-OS Could Allow for Arbitrary Code Execution

ITS Advisory Number: 
2021-145
Date(s) Issued: 
Friday, November 12, 2021
Subject: 
A Vulnerability in Palo Alto PAN-OS Could Allow for Arbitrary Code Execution
Overview: 

A vulnerability has been discovered in Palo Alto PAN-OS that could allow for arbitrary code execution. PAN-OS is the software that runs on all Palo Alto Network firewalls. Successful exploitation of this vulnerability could allow for arbitrary code execution with root privileges. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights.

 

THREAT INTELLIGENCE:

There are currently no reports of this vulnerability being exploited in the wild.

 

Systems Affected: 
  • Palo Alto PAN-OS versions prior to 10.1.3
  • Palo Alto PAN-OS versions prior to 10.0.8
  • Palo Alto PAN-OS versions prior to 9.1.11-h2
  • Palo Alto PAN-OS versions prior to 8.1.20-h1
RISK
GOVERNMENT
Large and medium government entities: 
High
Small government entities: 
Medium
BUSINESS
Large and medium business entities: 
High
Small business entities: 
Medium
Home Users: 
Low
Description: 

A OS command injection vulnerability in the Simple Certificate Enrollment Protocol (SCEP) feature of PAN-OS could allow for arbitrary code execution. To successfully exploit, the attacker must have specific knowledge of the firewall configuration, and have network access to the GlobalProtect interfaces. When exploited, an attacker can run execute arbitrary code with root privileges.

 

Successful exploitation of this vulnerability could allow for arbitrary code execution with root privileges. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights.

 

Actions: 
  • After appropriate testing, immediately apply patches or mitigations provided by Palo Alto to vulnerable systems.
  • Restrict access to the GlobalProtect interface to authorized hosts only.
  • Run all software as a non-privileged user (one without administrative privileges) to diminish the effects of a successful attack.
  • Apply the Principle of Least Privilege to all systems and services.