Palo Alto Networks PAN-OS Reflected Amplification Denial-of-Service Vulnerability

Exploited · KEV 2022-08-22CVE-2022-0028CWE-406

Exploited since 2022-08-22. No WAF vendor names it yet.

Edge rules

0/8

Our test

No exploit yet

CVSS

8.6

EPSS

2.7% Top 14%

Posts, 14d

Published

2022-08-10

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.

Edge coverage

Claimed by vendors

CloudflareBefore feed historyOlder than its feed AWSNo public claimNot named Microsoft AzureNo public claimNot named Google CloudBefore feed historyOlder than its feed FastlyBefore feed historyOlder than its feed F5Before feed historyOlder than its feed AkamaiNo public sourceNo public changelog OWASP CRSBefore feed historyOlder than its feed

Ask Vigil

AI · answers from this page

Ask about CVE-2022-0028: who's covered, what to patch first, how vendors compare. I cite sources and won't help with attacks.

Workers AI (Llama 3.3). Can be wrong: check the cited source.

Severity, decoded

CVSS 3.1

8.6High

High · 8.6 / 10

Exploitable over the network, with no privileges and no user interaction, leading to full loss of availability, and the impact can reach components beyond the vulnerable one.

Over the internetNo login neededNo user actionWorks reliablySpreads beyond the appSerious impact

How the score is built8 metrics

Attack vectorAn attacker can reach it over the internet; no access to your network needed.
Network
Attack complexityNo special conditions are needed; the attack works reliably.
Low
Privileges requiredNo account or login is needed.
None
User interactionNo one has to click or open anything; the attack works on its own.
None
ScopeThe attack can spread beyond the vulnerable component to other parts of the system.
Changed
Confidentiality impactNo data is exposed.
None
Integrity impactData cannot be changed by the attacker.
None
Availability impactAn attacker can take the component down completely or keep it from serving anyone.
High

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

CISA's assessmentSSVC, from the CVE record

ExploitationActive

Attackers are exploiting this in the wild.

AutomatableYes

Attackers can script the attack end to end and hit many targets at once.

Technical impactPartial

A successful attack gives limited control over the affected software or limited access to its data.

Public exploits

None found

0 Metasploit0 Exploit-DB0 Scanner template0 GitHub PoCs

No exploit in Exploit-DB or Metasploit, and no scanner template. That lowers, but doesn't remove, the chance of mass exploitation.

Timeline

2022-08-10
CVE published
CVE List
2022-08-22
Added to CISA KEV
Confirmed exploitation in the wild