Reflected amplification denial of service in PAN-OS URL filtering

1) Insufficient Control of Network Message Volume

EUVDB-ID: #VU66399

Risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H/E:H/RL:O/RC:C]

CVE-ID: CVE-2022-0028

CWE-ID: CWE-406 - Insufficient Control of Network Message Volume (Network Amplification)

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform DoS attack.

The vulnerability exists due to a misconfiguration of the PAN-OS URL filtering policy. A remote attacker can conduct reflected and amplified TCP denial-of-service (RDoS) attacks against other other system using the affected device as the source of the attack.

Successful exploitation of the vulnerability requires that the firewall configuration has a URL filtering profile with one or more blocked categories assigned to a security rule with a source zone that has an external facing network interface.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Palo Alto PAN-OS: 8.1 - 10.2.2

External links

http://security.paloaltonetworks.com/CVE-2022-0028

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

Yes. This vulnerability is being exploited in the wild.