#VU62311 Improper Handling of Exceptional Conditions in Palo Alto PAN-OS - CVE-2022-0023

Vulnerability identifier: #VU62311

Vulnerability risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2022-0023

CWE-ID: CWE-755

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Palo Alto PAN-OS
Operating systems & Components / Operating system

Vendor: Palo Alto Networks, Inc.

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to improper handling of exceptional conditions in the DNS proxy feature. A remote attacker can send a specially crafted request to the server and perform a denial of service (DoS) attack.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Palo Alto PAN-OS: 8.0 - 8.0.21, 8.1 - 8.1.21, 9.0 - 9.0.15, 10.0.0 - 10.0.9, 10.1.0 - 10.1.4

---

External links
https://security.paloaltonetworks.com/CVE-2022-0023

---

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?

No. We are not aware of malware exploiting this vulnerability.