Zero-day vulnerability in Palo Alto PAN-OS

Improper Check for Unusual or Exceptional Conditions
CVE-2024-3393

Vulnerability details

Advisory: SB2024122768 - Remote denial of service in Palo Alto Networks PAN-OS

Vulnerable component: Palo Alto PAN-OS

CVE-ID: CVE-2024-3393

CVSSv3 score: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H/E:H/RL:O/RC:C

CWE-ID: CWE-754 - Improper Check for Unusual or Exceptional Conditions

Description:

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

The vulnerability exists due to improper error handling in the DNS Security feature. A remote attacker can send specially crafted DNS packets through the data plane of the firewall and perform a denial of service (DoS) attack.

Note, the vulnerability is being actively exploited in the wild.

External links:

https://security.paloaltonetworks.com/CVE-2024-3393

About zero-day vulnerabilities

Zero-day vulnerability is an undisclosed vulnerability in software that hackers can exploit to compromise computer programs, gain unauthorized access to sensitive data, penetrate networks, etc. We consider vulnerability a zero-day when there is no solution provided from software vendor and the vulnerability is being actively exploited by malicious actors.

Zero-day candidate is a potential zero-day vulnerability in software which might have been used in targeted attacks, however there is no evidence to support this suggestion.