Horizon Alert
Summary of the vulnerability and why it matters
A Denial of Service vulnerability exists within the DNS Security feature of Palo Alto Networks PAN-OS software. This flaw allows an unauthenticated attacker to send a malicious packet via the firewall's data plane, leading to a firewall reboot. Repeated exploitation can cause the firewall to enter maintenance mode, disrupting network services.
- Vulnerable DNS Security feature
- Malicious packet causes reboot
- Network outages and disruption
Attack Path
How an attacker could exploit the issue
A vulnerability in the DNS Security feature of PAN-OS software allows an unauthenticated attacker to reboot a firewall by sending a malicious packet through the data plane. Repeated exploitation of this condition can lead to the firewall entering maintenance mode. This attack targets the network edge devices responsible for processing external traffic, potentially impacting their availability and the organization's network operations.
- Exposure to malicious packets.
- Unauthenticated attacker access.
- Malicious packet triggers reboot.
Live Threat
Current exploitation, exposure, and threat context
A vulnerability in Palo Alto Networks' PAN-OS software, specifically within its DNS Security feature, presents a significant risk. This flaw allows an unauthorized attacker to remotely reboot a firewall by sending a specially crafted packet. Persistent exploitation can lead to the firewall entering a maintenance mode, disrupting network operations.
- Likely attacker skill: Low
- Required access: None
- Business risk: High urgency
Priority actions
Operational Fix
Recommended remediation, mitigation, and detection steps
A denial of service vulnerability has been identified in Palo Alto Networks PAN-OS, potentially allowing an unauthenticated attacker to reboot firewalls through the data plane. Repeated exploitation could force a firewall into maintenance mode, impacting network availability and operational continuity for affected organizations. This situation presents a business risk that requires prompt attention.
- Identify all firewalls running PAN-OS.
- Isolate or restrict network access.
- Apply vendor updates and monitor.
