CVE-2024-3393 — Palo Alto Networks PAN-OS Malicious DNS Packet Vulnerability
Overview
Palo Alto Networks PAN-OS contains a vulnerability in parsing and logging malicious DNS packets in the DNS Security feature that, when exploited, allows an unauthenticated attacker to remotely reboot the firewall. Repeated attempts to trigger this condition will cause the firewall to enter maintenance mode.
Vulnerability details
- CVE ID
- CVE-2024-3393
- Vulnerability
- Palo Alto Networks PAN-OS Malicious DNS Packet Vulnerability
- Vendor
- Palo Alto Networks
- Affected products
- Palo Alto Networks: PAN-OS
- Severity
- HIGH
- Exploitation status
- Actively exploited in the wild (CISA KEV)
- Published
- 2024-12-30
Remediation guidance
CVE-2024-3393 is in CISA's Known Exploited Vulnerabilities (KEV) catalog — U.S. federal civilian agencies are required to remediate it under Binding Operational Directive 22-01. Treat it as a priority for every environment.
Apply the vendor's official security update for Palo Alto Networks the affected product as soon as possible. Where a patch is unavailable, apply vendor mitigations or isolate/segment exposed systems.
Hunt for indicators of compromise tied to this vulnerability and confirm logging/EDR coverage on affected assets.
Authoritative references
Remediate CVE-2024-3393 — and stay ahead of the next one
CVE-2024-3393 is listed in the CISA KEV catalog as actively exploited — treat remediation as urgent. Scan your domain free to see whether CVE-2024-3393 and other Palo Alto Networks issues affect you and get a prioritized remediation report (full report from ₹999) — or stream the full feed of 1,600+ actively-exploited CVEs straight into your SOC.
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