CVE-2020-2000
📋 TL;DR
This CVE describes an OS command injection and memory corruption vulnerability in PAN-OS management web interface that allows authenticated administrators to execute arbitrary code and OS commands with root privileges. It affects PAN-OS versions 8.1 before 8.1.16, 9.0 before 9.0.10, 9.1 before 9.1.4, and 10.0 before 10.0.1.
💻 Affected Systems
- Palo Alto Networks PAN-OS
📦 What is this software?
Pan Os by Paloaltonetworks
Pan Os by Paloaltonetworks
Pan Os by Paloaltonetworks
Pan Os by Paloaltonetworks
⚠️ Risk & Real-World Impact
Worst Case
Authenticated attacker gains root shell access, executes arbitrary commands, compromises the entire firewall, and pivots to internal networks.
Likely Case
Authenticated malicious insider or compromised admin account executes commands to disrupt services, exfiltrate data, or establish persistence.
If Mitigated
Limited to authenticated administrators only, with proper access controls limiting damage scope.
🎯 Exploit Status
Exploitation requires valid administrator credentials to the PAN-OS management interface.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: PAN-OS 8.1.16, 9.0.10, 9.1.4, 10.0.1 or later
Vendor Advisory: https://security.paloaltonetworks.com/CVE-2020-2000
Restart Required: Yes
Instructions:
1. Backup configuration. 2. Download appropriate PAN-OS version from Palo Alto support portal. 3. Upload and install software update via web interface or CLI. 4. Reboot firewall after installation completes.
🔧 Temporary Workarounds
Restrict Management Interface Access
allLimit access to PAN-OS management interface to trusted IP addresses only.
Configure management interface ACLs via CLI or web interface
Enforce Strong Authentication
allImplement multi-factor authentication for all administrator accounts.
Configure MFA via Authentication Profile settings
🧯 If You Can't Patch
- Implement strict network segmentation to isolate management interfaces
- Enable detailed logging and monitoring for all administrator activities
🔍 How to Verify
Check if Vulnerable:
Check PAN-OS version via web interface (Device > Setup > Operations) or CLI command 'show system info'Check Version:
show system info | match versionVerify Fix Applied:
Verify installed version is PAN-OS 8.1.16+, 9.0.10+, 9.1.4+, or 10.0.1+📡 Detection & Monitoring
Log Indicators:
- Unusual administrator command execution patterns
- Multiple failed authentication attempts followed by successful login
Network Indicators:
- Unexpected outbound connections from firewall management interface
- Anomalous traffic patterns from firewall to internal systems
SIEM Query:
source="pan-firewall" (event_type="ADMIN" AND command="*injection*" OR command="*shell*")