Denial of Service Vulnerability in Palo Alto Networks PAN-OS Software
CVE-2024-3393

7.1HIGH

Key Information:

Vendor: Palo Alto Networks
Status: Cloud Ngfw; Pan-os
Vendor: CVE Published:; 27 December 2024

Badges

🥇 Trended No. 1📈 Trended📈 Score: 5,820👾 Exploit Exists🟡 Public PoC🦅 CISA Reported📰 News Worthy

What is CVE-2024-3393?

CVE-2024-3393 is a significant Denial of Service (DoS) vulnerability found in the DNS Security feature of Palo Alto Networks PAN-OS software. This software is critical for organizations that rely on Palo Alto firewalls for network security, as it facilitates the protection of network traffic and ensures the integrity of data transfers. The vulnerability allows unauthenticated attackers to send specially crafted packets through the firewall, which can lead to unintentional rebooting of the device. This can severely disrupt network operations and compromise the availability of essential services, ultimately impacting organizational performance and security.

Technical Details

CVE-2024-3393 specifically exploits a flaw in the way PAN-OS handles incoming DNS requests. An attacker can manipulate these requests to trigger a failure in the firewall’s operational status, causing it to reboot. Repeated exploitation may force the device into maintenance mode, which signifies a more profound state of unavailability and requires manual intervention to restore functionality. This flaw does not require any authentication, which amplifies the risk, as it can be leveraged by anyone on the internet with malicious intent.

Potential impact of CVE-2024-3393

Service Disruption: The vulnerability can lead to unexpected reboots of the firewall, causing significant interruptions in network service for organizations that depend on the reliability of their security infrastructure.
Increased Operational Costs: Continuous attempts to exploit this vulnerability may result in the firewall entering maintenance mode, necessitating additional IT resources and interventions to rectify the situation, leading to increased operational expenditures.
Reputation Damage: Frequent downtimes or security breaches due to exploited vulnerabilities can tarnish an organization's reputation, undermining stakeholder trust and potentially leading to loss of business.

CISA Reported

CISA provides regional cyber and physical services to support security and resilience across the United States. CISA monitor the most dangerious vulnerabilities and have identifed as being exploited but is not known by the CISA to be used in ransomware campaigns. This is subject to change at pace

The CISA's recommendation is: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

Affected Version(s)

PAN-OS 11.2.0 < 11.2.3

PAN-OS 11.1.0 < 11.1.2-h16

PAN-OS 10.2.8 < 10.2.8-h19

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

-CVE-2024-3393
Created by FelixFoxf

News Articles

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CVE-2024-3393

CISA Warns of Palo Alto Networks PAN-OS Vulnerability Exploited in Wild

The U.S. Cybersecurity and Infrastructure Security Agency (CISA) has issued a high-priority alert on a critical vulnerability in Palo Alto Networks PAN-OS.

1 week ago