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Known exploited vulnerability

CVE-2022-0028

highCVSS 3.1 8.6In CISA KEVEPSS 2.7%Published · Palo Alto Networks

The short answer

CVE-2022-0028 affects Palo Alto Networks Cloud NGFW and is rated high (CVSS 8.6). CISA added it to the Known Exploited Vulnerabilities catalog on 2022-08-22: attackers are using it, so patch it first.

What it is

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.

Weakness: CWE-406.

Severity

8.6 high

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

Exploited (CISA KEV)

Yes, since Aug 22, 2022

Federal due date Sep 12, 2022

EPSS, next 30 days

2.7%

Higher than 86% of scored CVEs

How it can be exploited

Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Changed
Confidentiality impact
None
Integrity impact
None
Availability impact
High

What CISA says to do

Apply updates per vendor instructions.

Affected products

Cloud NGFW, PAN-OS, Prisma Access, pan-os. NVD's record lists the exact affected versions.

References

Questions

Is CVE-2022-0028 being exploited?

Yes. CISA added CVE-2022-0028 to its Known Exploited Vulnerabilities catalog on 2022-08-22, with a federal remediation due date of 2022-09-12.

How do I fix CVE-2022-0028?

CISA's required action: Apply updates per vendor instructions.

From NVD, CISA KEV, FIRST EPSS and OSV.dev, checked . Status on NVD: Analyzed. The description is NVD's text, quoted as published.

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