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Medium severity5.9NVD Advisory· Published Apr 13, 2022· Updated Jun 17, 2026

CVE-2022-0023

CVE-2022-0023

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.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

4
  • Paloaltonetworks/Pan OS3 versions
    cpe:2.3:o:paloaltonetworks:pan-os:*:*:*:*:*:*:*:*+ 2 more
    • cpe:2.3:o:paloaltonetworks:pan-os:*:*:*:*:*:*:*:*range: >=8.1.0,<8.1.22
    • (no CPE)range: <8.1.22, <9.0.16, <9.1.13, <10.0.10, <10.1.5
    • (no CPE)range: 8.1
  • Paloaltonetworks/Prisma Access Agentcpe-rescue
    Range: 3.0 Preferred, Innovation

Patches

Vulnerability mechanics

References

1

News mentions

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