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TI-2022-00018 Aliases CVE-2022-0023GHSA-x983-h22q-4r7v

PAN-OS: Denial-of-Service (DoS) Vulnerability in DNS Proxy

Priority LOW 28CWE-755Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
High
Impact type
—
Confidentiality · integrity · availability
None · None · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA.

Summary

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.

Why it matters now

EPSS 0.00732 54th percentileScored 2026-11-08
Fix Fixed PAN-OS (Palo Alto Networks): 8.1.22, 9.1.13, 10.1.5 +2Prisma Access (Palo Alto Networks): 3.0 Preferred, Innovation, 2.2 Preferred +1

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
Palo Alto NetworksPAN-OS8.1 to before 8.1.22; 9.1 to before 9.1.13; 10.1 to before 10.1.5; 10.0 to before 10.0.10; 9.0 to before 9.0.168.1.22, 9.1.13, 10.1.5, 10.0.10, 9.0.16Patch availableCNA
Palo Alto NetworksPrisma Access—3.0 Preferred, Innovation, 2.2 Preferred, 2.1 Preferred, InnovationPatch availableCNA
  • PAN-OS VendorPalo Alto Networks Affected 8.1 to before 8.1.22; 9.1 to before 9.1.13; 10.1 to before 10.1.5; 10.0 to before 10.0.10; 9.0 to before 9.0.16 Fixed in 8.1.22, 9.1.13, 10.1.5, 10.0.10, 9.0.16 Patch available CNA
  • Prisma Access VendorPalo Alto Networks Affected — Fixed in 3.0 Preferred, Innovation, 2.2 Preferred, 2.1 Preferred, Innovation Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:o:paloaltonetworks:pan-os:*:*:*:*:*:*:*:*8.1.0 to before 8.1.22; 9.0.0 to before 9.0.16; 9.1.0 to before 9.1.13; 10.0.0 to before 10.0.10; 10.1.0 to before 10.1.5VulnerableCyberArk Software, a Palo Alto Networks Company
  • cpe:2.3:o:paloaltonetworks:pan-os:*:*:*:*:*:*:*:* Versions 8.1.0 to before 8.1.22; 9.0.0 to before 9.0.16; 9.1.0 to before 9.1.13; 10.0.0 to before 10.0.10; 10.1.0 to before 10.1.5 Vulnerable ·CyberArk Software, a Palo Alto Networks Company

Remediation

  • Fix · CNA PAN-OS (Palo Alto Networks) Fixed in 8.1.22, 9.1.13, 10.1.5, 10.0.10, 9.0.16
  • Fix · CNA Prisma Access (Palo Alto Networks) Fixed in 3.0 Preferred, Innovation, 2.2 Preferred, 2.1 Preferred, Innovation

Timeline

  1. 2026-10-02 Threatist record created from CVE-2022-0023
  2. 2026-10-03 Alias added: GHSA-x983-h22q-4r7v

References

Advisory 1

  • TI-2024-08782 Expedition: Unauthenticated OS Command Injection Vulnerability Leads to Firewall Credential Disclosure KEVCVSS 4.0CRITICAL 9.9
  • TI-2024-03172 PAN-OS: Arbitrary File Creation Leads to OS Command Injection Vulnerability in GlobalProtect KEVCVSS 3.1CRITICAL 10.0
  • TI-2020-01936 PAN-OS: Authentication Bypass in SAML Authentication KEVCVSS 3.1CRITICAL 10.0
  • TI-2017-11675 Palo Alto Networks PAN-OS before 6.1.19, 7.0.x before 7.0.19, 7.1.x before 7.1.14, and… KEVCVSS 3.1CRITICAL 9.8
  • TI-2026-00239 PAN-OS: Unauthenticated user initiated Buffer Overflow Vulnerability in User-ID™ Authentication Portal KEVCVSS 4.0CRITICAL 9.3
  • TI-2024-08784 Expedition: SQL Injection Leads to Firewall Admin Credential Disclosure KEVCVSS 4.0CRITICAL 9.2
See all 367 →

Sources

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