Description
An improper handling of exceptional conditions vulnerability exists in the DNS proxy feature of Palo Alto Networks PAN-OS software that enables a meddler-in-the-middle (MITM) to send specifically crafted traffic to the firewall that causes the service to restart unexpectedly. Repeated attempts to send this request result in denial-of-service to all PAN-OS services by restarting the device in maintenance mode. This issue does not impact Panorama appliances and Prisma Access customers. This issue impacts: PAN-OS 8.1 versions earlier than PAN-OS 8.1.22; PAN-OS 9.0 versions earlier than PAN-OS 9.0.16; PAN-OS 9.1 versions earlier than PAN-OS 9.1.13; PAN-OS 10.0 versions earlier than PAN-OS 10.0.10; PAN-OS 10.1 versions earlier than PAN-OS 10.1.5. This issue does not impact PAN-OS 10.2.
Metrics
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:HWeakness enumeration
Affected software
| Vendor | Product | Versions |
|---|---|---|
| Palo Alto Networks | PAN-OS | >= 8.1, < 8.1.22; >= 9.1, < 9.1.13; >= 10.1, < 10.1.5; >= 10.0, < 10.0.10; >= 9.0, < 9.0.16 |
| Palo Alto Networks | Prisma Access | — |
References
- https://security.paloaltonetworks.com/CVE-2022-0023Vendor Advisory
- https://security.paloaltonetworks.com/CVE-2022-0023Vendor Advisory
Timeline
- Published
- Apr 13, 2022
- Last modified
- Jun 17, 2026
- NVD status
- Modified