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CVE-2024-3393: Palo Alto Networks PAN-OS Malicious DNS Packet Vulnerability

criticalknown exploitedCVE-2024-3393
Actively exploited. At least one CVE in this advisory is listed in the CISA Known Exploited Vulnerabilities catalog — exploitation has been observed in the wild. Treat remediation as urgent.
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.

CSIRTS triage

vendor: Palo Alto Networksproduct: PAN-OSDenial of service
What
Palo Alto Networks PAN-OS contains a vulnerability in parsing and logging malicious DNS packets that can allow an unauthenticated attacker to remotely reboot the firewall.
Who is affected
Deployments of Palo Alto Networks PAN-OS firewalls.
Urgency
Remediation is urgent due to active exploitation and critical severity.
Action
Apply the security updates provided by Palo Alto Networks.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source
CISA Known Exploited Vulnerabilities (US · database · site)
Severity
critical
Published
2024-12-30
Exploitation
Observed in the wild (CISA KEV)

Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2024-3393

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Referenced CVEs

CVECSIRTS overviewExternal
CVE-2024-3393coverage & exploitation statusNVD · CVE.org

Recent advisories for Palo Alto Networks

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

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