ClosedHighPatched

Palo Alto Networks PAN-OS Malicious DNS Packet

Palo Alto Networks PAN-OS

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. Added to the CISA KEV catalog on 2024-12-30.

Why this severity: CVSS 8.7 (v4.0, CNA), actively exploited (CISA KEV)

Started: Dec 27, 2024
Closed: Dec 30, 2024
CVE: CVE-2024-3393

Follow this incident

Updated Dec 30, 2024

Affected

See vendor advisory (versions are not listed in the KEV record)

Fixed in

See vendor advisory linked in sources

Timeline2

Dec 30, 2024
CISA added CVE-2024-3393 to the KEV catalog (federal deadline 2025-01-20)
Source
Dec 27, 2024
CVE-2024-3393 published
Source

Advisories3

Notes & caveats

Derived from the CISA KEV JSON feed (catalogVersion 2026.10.21); CVSS from the CVE record (cveawg.mitre.org). startedAt is the CVE publication date when it fell in 2024 before the KEV listing, else the KEV dateAdded; exploitation may have begun earlier. closedAt is the KEV listing date (a fix or mitigation was available then unless noted).

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