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.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| 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 | 10.2.* |
| Palo Alto Networks | Prisma Access | — | 3.0 Preferred, Innovation |