CVEs / CVE-2022-0028
CVE-2022-0028: Palo Alto Networks PAN-OS Reflected Amplification Denial-of-Service Vulnerability
- Known exploited in the CISA KEV catalog since 22 Aug 2022
- high 8.6 CVSS 3.1 (NVD)
- EPSS 2.69% chance of exploitation in the next 30 days, higher than 85% of CVEs (30 Oct 2026)
- Last changed at its sources
Are you affected? Check your servers with Stackurity: it lists the software on each server and the vulnerabilities to fix first.
Check your servers with Stackurity Already using Stackurity? Search for CVE-2022-0028
Summary
A Palo Alto Networks PAN-OS URL filtering policy misconfiguration could allow a network-based attacker to conduct reflected and amplified TCP denial-of-service (RDoS) attacks.
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.
Affected and fixed versions
| Product | Affected | Fixed in |
|---|---|---|
| Palo Alto Networks PAN-OS | from 8.1, before 8.1.23-h1 | 8.1.23-h1 |
| Palo Alto Networks PAN-OS | from 9.0, before 9.0.16-h3 | 9.0.16-h3 |
| Palo Alto Networks PAN-OS | from 9.1, before 9.1.14-h4 | 9.1.14-h4 |
| Palo Alto Networks PAN-OS | from 10.0, before 10.0.11-h1 | 10.0.11-h1 |
| Palo Alto Networks PAN-OS | from 10.1, before 10.1.6-h6 | 10.1.6-h6 |
| Palo Alto Networks PAN-OS | from 10.2, before 10.2.2-h2 | 10.2.2-h2 |
| paloaltonetworks pan-os | from 8.1.0, before 8.1.23-h | 8.1.23-h |
| paloaltonetworks pan-os | from 9.0.0, before 9.0.16-h3 | 9.0.16-h3 |
| paloaltonetworks pan-os | from 9.1.0, before 9.1 < 9.1.14-h4 | 9.1 < 9.1.14-h4 |
| paloaltonetworks pan-os | from 10.0.0, before 10.0.11-h1 | 10.0.11-h1 |
| paloaltonetworks pan-os | from 10.1.0, before 10.1.6-h6 | 10.1.6-h6 |
| paloaltonetworks pan-os | from 10.2.0, before 10.2.2-h2 | 10.2.2-h2 |
Exploitation
| In CISA KEV since | 22 Aug 2022 |
|---|---|
| Due date for US federal agencies | 12 Sep 2022 |
| Used in ransomware campaigns | Unknown |
| Required action | Apply updates per vendor instructions. |
Severity
| CVSS 3.1 | 8.6 highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:HScored by NVD |
|---|---|
| Weakness | CWE-406 |
References
- CVE-2022-0028 on NVD
- CVE-2022-0028 in the CISA KEV catalog
- https://security.paloaltonetworks.com/CVE-2022-0028 (cited by CISA)
- https://security.paloaltonetworks.com/CVE-2022-0028 Mitigation, Third Party Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2022-0028 US Government Resource
Sources
Exploitation status from the CISA Known Exploited Vulnerabilities catalog. EPSS scores from FIRST. Descriptions, severity and references from the National Vulnerability Database. Open-source package versions from OSV (CC-BY 4.0). Text is shown as each source states it; Stackurity does not edit it. Check the vendor's advisory before acting.
This product uses data from the NVD API but is not endorsed or certified by the NVD.