CVE-2022-0028 — A PAN-OS URL filtering policy misconfiguration could allow a network-based attacker to…¶

Key facts

CVE-2022-0028 is a High (8.6) vulnerability: A PAN-OS URL filtering policy misconfiguration could allow a network-based attacker to…. This entry ships a detection-only PoC and a Docker test lab. It is on the CISA Known Exploited Vulnerabilities (KEV) catalog (added 2022-08-22), confirming active exploitation in the wild.

Actively exploited — on the CISA KEV catalog

CVE-2022-0028 is listed on the CISA Known Exploited Vulnerabilities (KEV) catalog (added 2022-08-22), confirming exploitation in the wild. Federal remediation deadline: 2022-09-12. Prioritise patching and deploy the detection and prevention rules below.


CVE	CVE-2022-0028
Severity	High (8.6)
CISA KEV	Actively exploited (added 2022-08-22)
Detection / prevention	—
PoC	poc.py
Source	2022/CVE-2022-0028/

Details¶

English | 한국어

Description¶

A PAN-OS URL filtering policy misconfiguration could allow a network-based attacker to conduct reflected and amplified TCP denial-of-service (RDoS) attacks. The DoS attack would appear to originate from a Palo Alto Networks PA-Series (hardware), VM-Series (virtual) and CN-Series (container) firewall against an attacker-specified target. To be misused by an external attacker, the firewall configuration must have a URL filtering profile with one or more blocked categories assigned to a source zone that has an external facing interface. This configuration is not typical for URL filtering and, if set, is likely unintended by the administrator. If exploited, this issue would not impact the confidentiality, integrity, or availability of our products. However, the resulting denial-of-service (DoS) attack may help obfuscate the identity of the attacker and implicate the firewall as the source of the attack. We have taken prompt action to address this issue in our PAN-OS software. All software updates for this issue are expected to be released no later than the week of August 15, 2022. This issue does not impact Panorama M-Series or Panorama virtual appliances. This issue has been resolved for all Cloud NGFW and Prisma Access customers and no additional action is required from them.

Vulnerability Details¶

Property	Value
CVE ID	CVE-2022-0028
Type	RCE
CVSS Score	8.6

Proof of Concept¶

Download¶

# Download PoC script
curl -O https://raw.githubusercontent.com/fankh/vulnerability-poc/main/2022/CVE-2022-0028/poc.py

Usage¶

# Run PoC against target
python3 poc.py --target <TARGET_URL>

# With authentication
python3 poc.py --target <TARGET_URL> --username <USER> --password <PASS>

⚠️ Warning: This PoC is for authorized security testing only. It uses detection-only techniques and does not exploit or damage target systems.

Test Lab¶

This repository includes a Docker-based test environment with both vulnerable and patched applications.

Quick Start¶

# Clone and navigate to CVE directory
cd CVE-2022-0028

# Start both applications
docker-compose up -d

# Run tests
./run-tests.sh    # Linux/Mac
./run-tests.ps1   # Windows PowerShell

Application Endpoints¶

Application	URL	Status
Vulnerable App	http://localhost:8080	Shows vulnerability
Patched App	http://localhost:8081	Demonstrates fix

Directory Structure¶

├── README.md           # English documentation
├── README_KO.md        # Korean documentation
├── poc.py              # PoC detection script
├── docker-compose.yml  # Container orchestration
├── run-tests.sh        # Linux/Mac test runner
├── run-tests.ps1       # Windows test runner
├── vulnerable-app/     # Vulnerable version
│   ├── app.py
│   ├── Dockerfile
│   └── requirements.txt
└── patched-app/        # Fixed version
    ├── app.py
    ├── Dockerfile
    └── requirements.txt

References¶

https://security.paloaltonetworks.com/CVE-2022-0028
https://security.paloaltonetworks.com/CVE-2022-0028
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2022-0028

Generated by PoC Generator on 2026-07-12T06:11:13.39860036

Frequently asked questions¶

What is CVE-2022-0028?¶

CVE-2022-0028 is a High (8.6) vulnerability: A PAN-OS URL filtering policy misconfiguration could allow a network-based attacker to…. This entry ships a detection-only PoC and a Docker test lab. It is on the CISA Known Exploited Vulnerabilities (KEV) catalog (added 2022-08-22), confirming active exploitation in the wild.

How do I detect CVE-2022-0028?¶

Run the detection-only PoC included with this entry against your Docker test lab to confirm whether a target is affected; pair it with your own IDS logging.

How do I block or mitigate CVE-2022-0028?¶

Upgrade to a fixed version per the vendor advisory; the NVD record lists the affected versions. Use the included PoC to verify your remediation.

Is CVE-2022-0028 actively exploited?¶

Yes. CVE-2022-0028 is on the CISA Known Exploited Vulnerabilities (KEV) catalog, added 2022-08-22, which means it has been exploited in the wild. CISA set a federal remediation deadline of 2022-09-12. Prioritise patching and deploy the detection and prevention rules above.

For authorized security testing and research only. See the full source and NVD record.