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TI-2022-00023 Aliases CVE-2022-0028GHSA-r3j6-h9rm-9q33

PAN-OS: Reflected Amplification Denial-of-Service (DoS) Vulnerability in URL Filtering

Priority CRITICAL 94Exploited in the wildCWE-406Published · Updated

Key facts

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

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

Summary

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.

Why it matters now

Exploitation Active In CISA KEV since 2022-08-22CISA due date 2022-09-12
EPSS 0.0269 85th percentileScored 2026-11-07
Fix Fixed Cloud NGFW (Palo Alto Networks): AllPAN-OS (Palo Alto Networks): 8.1.23-h1, 9.0.16-h3, 9.1.14-h4 +3+1 more product

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Active
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
Palo Alto NetworksCloud NGFW—AllPatch availableCNA
Palo Alto NetworksPAN-OS8.1 to before 8.1.23-h1; 9.0 to before 9.0.16-h3; 9.1 to before 9.1.14-h4; 10.0 to before 10.0.11-h1; 10.1 to before 10.1.6-h6; 10.2 to before 10.2.2-h28.1.23-h1, 9.0.16-h3, 9.1.14-h4, 10.0.11-h1, 10.1.6-h6, 10.2.2-h2Patch availableCNA
Palo Alto NetworksPrisma Access—2.1 All, 2.2 All, 3.0 All, 3.1 AllPatch availableCNA
  • Cloud NGFW VendorPalo Alto Networks Affected — Fixed in All Patch available CNA
  • PAN-OS VendorPalo Alto Networks Affected 8.1 to before 8.1.23-h1; 9.0 to before 9.0.16-h3; 9.1 to before 9.1.14-h4; 10.0 to before 10.0.11-h1; 10.1 to before 10.1.6-h6; 10.2 to before 10.2.2-h2 Fixed in 8.1.23-h1, 9.0.16-h3, 9.1.14-h4, 10.0.11-h1, 10.1.6-h6, 10.2.2-h2 Patch available CNA
  • Prisma Access VendorPalo Alto Networks Affected — Fixed in 2.1 All, 2.2 All, 3.0 All, 3.1 All Patch available CNA

CPE configurations NVD · 11

CPEVersionsRoleVendor
cpe:2.3:o:paloaltonetworks:pan-os:*:*:*:*:*:*:*:*8.1.0 to before 8.1.23; 9.0.0 to before 9.0.16; 9.1.0 to before 9.1.14; 10.0.0 to before 10.0.11; 10.1.0 to before 10.1.6; 10.2.0 to before 10.2.2VulnerableCyberArk Software, a Palo Alto Networks Company
cpe:2.3:o:paloaltonetworks:pan-os:8.1.23:-:*:*:*:*:*:*8.1.23VulnerableCyberArk Software, a Palo Alto Networks Company
cpe:2.3:o:paloaltonetworks:pan-os:9.0.16:-:*:*:*:*:*:*9.0.16VulnerableCyberArk Software, a Palo Alto Networks Company
cpe:2.3:o:paloaltonetworks:pan-os:9.0.16:h2:*:*:*:*:*:*9.0.16 h2VulnerableCyberArk Software, a Palo Alto Networks Company
cpe:2.3:o:paloaltonetworks:pan-os:9.1.14:-:*:*:*:*:*:*9.1.14VulnerableCyberArk Software, a Palo Alto Networks Company
cpe:2.3:o:paloaltonetworks:pan-os:9.1.14:h1:*:*:*:*:*:*9.1.14 h1VulnerableCyberArk Software, a Palo Alto Networks Company
cpe:2.3:o:paloaltonetworks:pan-os:10.0.11:*:*:*:*:*:*:*10.0.11VulnerableCyberArk Software, a Palo Alto Networks Company
cpe:2.3:o:paloaltonetworks:pan-os:10.1.6:*:*:*:*:*:*:*10.1.6VulnerableCyberArk Software, a Palo Alto Networks Company
cpe:2.3:o:paloaltonetworks:pan-os:10.1.6:h3:*:*:*:*:*:*10.1.6 h3VulnerableCyberArk Software, a Palo Alto Networks Company
cpe:2.3:o:paloaltonetworks:pan-os:10.2.2:-:*:*:*:*:*:*10.2.2VulnerableCyberArk Software, a Palo Alto Networks Company
Show 1 more CPE
CPEVersionsRoleVendor
cpe:2.3:o:paloaltonetworks:pan-os:10.2.2:h1:*:*:*:*:*:*10.2.2 h1VulnerableCyberArk Software, a Palo Alto Networks Company

Remediation

  • Fix · CNA Cloud NGFW (Palo Alto Networks) Fixed in All
  • Fix · CNA PAN-OS (Palo Alto Networks) Fixed in 8.1.23-h1, 9.0.16-h3, 9.1.14-h4, 10.0.11-h1, 10.1.6-h6, 10.2.2-h2
  • Fix · CNA Prisma Access (Palo Alto Networks) Fixed in 2.1 All, 2.2 All, 3.0 All, 3.1 All

Timeline

  1. 2022-08-22 Added to CISA KEV
  2. 2026-10-02 Threatist record created from CVE-2022-0028
  3. 2026-10-03 Alias added: GHSA-r3j6-h9rm-9q33

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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