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ExploitedIn CISA KEVFix available

CVE-2022-0028

Exploitation confirmed. First attested on 2022-08-22 by CISA-ADP, CISA KEV, GCVE · kevintel.

  • Published2022-08-10
  • Fixed in10.2.2 · 10.2.2-h2 · 10.1.6 · 10.1.6-h6 · 10.0.11 · 10.0.11-h1
  • WeaknessCWE-406

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

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.

Timeline

dates in UTC
  1. 2022-08-1016:15CVE publishedNVD
  2. 2022-08-22Added to the CISA KEV catalogCISA KEV
  3. 2022-08-22Listed as exploited by GCVEGCVE
  4. 2022-08-22Exploitation first reportedCISA KEV
  5. 2025-01-2722:26SSVC exploitation set to activeCISA-ADP

Observed activity

isMalicious corpus · updated 2026-11-03 21:37 UTC
Indicators tagged with this CVE, per day0 indicators over 7 days
Block these indicators
  • Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2022-0028?format=txt
  • CSV export: https://api.ismalicious.com/edl/cve/CVE-2022-0028?format=csv
  • TAXII collection of exploited CVEs
  • The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD · CISA-ADP
Palo Alto PAN-OS
BranchAffectedFixed in
10.2≥ 10.2.0, < 10.2.210.2.2
10.2≥ 10.2.0, < 10.2.2-h210.2.2-h2
10.1≥ 10.1.0, < 10.1.610.1.6
10.1≥ 10.1.0, < 10.1.6-h610.1.6-h6
10.0≥ 10.0.0, < 10.0.1110.0.11
10.0≥ 10.0.0, < 10.0.11-h110.0.11-h1
9.1≥ 9.1.0, < 9.1.149.1.14
9.1≥ 9.1.0, < 9.1 < 9.1.14-h49.1 < 9.1.14-h4
9.0≥ 9.0.0, < 9.0.169.0.16
9.0≥ 9.0.0, < 9.0.16-h39.0.16-h3
8.1≥ 8.1.0, < 8.1.238.1.23
8.1≥ 8.1.0, < 8.1.23-h8.1.23-h

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Products declared by the CNA3 products

As palo_alto, the CNA that assigned this CVE, declared them in the CVE record; versions as written.

  • Palo Alto Networks Cloud NGFW

    Not affected all versions

  • Palo Alto Networks PAN-OS
    Affected
    • ≥ 8.1, < 8.1.23-h1fixed in 8.1.23-h1custom
    • ≥ 9.0, < 9.0.16-h3fixed in 9.0.16-h3custom
    • ≥ 9.1, < 9.1.14-h4fixed in 9.1.14-h4custom
    • ≥ 10.0, < 10.0.11-h1fixed in 10.0.11-h1custom
    • ≥ 10.1, < 10.1.6-h6fixed in 10.1.6-h6custom
    • ≥ 10.2, < 10.2.2-h2fixed in 10.2.2-h2custom
  • Palo Alto Networks Prisma Access

    Not affected = 2.1 All · = 2.2 All · = 3.0 All · = 3.1 All

Source: the CNA record (CVE Program), © The MITRE Corporation,CVE Terms of UseCVE recordupdated 2022-08-10

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Vendor advisories

  • ICSA-24-102-03 CISA1 known affected

    Siemens RUGGEDCOM APE1808

    RUGGEDCOM APE1808

  • SSA-822518 Siemens ProductCERT1 known affected

    SSA-822518: Multiple Vulnerabilities in Palo Alto Networks Virtual NGFW Before V11.0.1 on RUGGEDCOM APE1808 Devices

    RUGGEDCOM APE1808

Full record on NVD

Fix

  1. Update Palo Alto PAN-OS to 10.2.2 · 10.2.2-h2 · 10.1.6 · 10.1.6-h6 · 10.0.11 · 10.0.11-h1 · 9.1.14 · 9.1 < 9.1.14-h4
  2. CISA’s required action: Apply updates per vendor instructions.due 2022-09-12
  3. Vendor fix Siemens ProductCERT SSA-822518 · 1 productUpgrade Palo Alto Networks Virtual NGFW V11.0.1. Contact Siemens customer support to receive patch and update information.
  4. Vendor fix CISA ICSA-24-102-03 · 1 productUpgrade Palo Alto Networks Virtual NGFW V11.0.1. Contact Siemens customer support to receive patch and update information.

Advisories and patches

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof-of-concept repositories
none listed
PoC-in-GitHub
Metasploit modules
none listed
Metasploit Framework

CISA Known Exploited Vulnerability

Date Added
2022-08-22
Patch Due Date
2022-09-12
Ransomware Use
Unknown
Required Action
Apply updates per vendor instructions.

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
Published
2022-08-10
Last Modified
2026-06-17
NVD status
Analyzed
GitHub Advisory
GHSA-r3j6-h9rm-9q33

Frequently asked questions

What is CVE-2022-0028?

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.

Is CVE-2022-0028 actively exploited?

Yes. CVE-2022-0028 is on the CISA Known Exploited Vulnerabilities (KEV) catalog, meaning it has been confirmed as actively exploited in the wild. CISA requires federal agencies to patch by 2022-09-12.

What is the CVSS score for CVE-2022-0028?

CVE-2022-0028 has a CVSS v3 base score of 8.6 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H.

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