Secuno
ENNL
Book demo

CVE-2024-3393

Palo Alto Networks PAN-OS Malicious DNS Packet

7.5 HIGHActively exploited (CISA KEV)EPSS 29.1%
  1. Published27 Dec 2024
  2. Added to CISA KEV30 Dec 2024
  3. Remediation due20 Jan 2025
Actively exploited (CISA KEV)

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 KEV: 30 Dec 2024Federal remediation due: 20 Jan 2025

Description

A Denial of Service vulnerability in the DNS Security feature of Palo Alto Networks PAN-OS software allows an unauthenticated attacker to send a malicious packet through the data plane of the firewall that reboots the firewall. Repeated attempts to trigger this condition will cause the firewall to enter maintenance mode.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityNone
IntegrityNone
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

Palo Alto Networks Prisma Accessall versions
Palo Alto Networks PAN-OS≥ 11.1.0 ≤ 11.1.1 · ≥ 11.2.0 < 11.2.3 · 10.1.14 · 10.2.11

Remediation

Fixed in
Palo Alto Networks PAN-OS≥ 11.2.3

References

Related CVEs

Recent high-severity vulnerabilities sharing a weakness type.

CVE-2026-1063468.8
Improper state validation in DevTools in Google Chrome prior to 155.0.8059.39 allowed a…
CVE-2026-1002968.1
In Anjvision YSSD-RTMP-H5 firmware version 3.3.2.4, an empty-body POST to…
CVE-2026-917338.3
Improper state validation in Skia in Google Chrome prior to 153.0.8010.47 allowed a…
CVE-2026-658388.2
Skipper is an HTTP router and reverse proxy for service composition. Prior to 0.27.35,…
CVE-2026-790738.8
Improper state validation in Parser in Google Chrome prior to 152.0.7977.65 allowed a…
CVE-2026-790728.1
Improper state validation in Performance in Google Chrome prior to 152.0.7977.65…

Frequently asked

Is CVE-2024-3393 being actively exploited?

Yes. CVE-2024-3393 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added 30 Dec 2024.

How severe is CVE-2024-3393?

CVE-2024-3393 has a CVSS 3.1 base score of 7.5, rated high. EPSS estimates a 29.1% probability of exploitation.

Which products are affected by CVE-2024-3393?

Affected products include Palo Alto Networks Prisma Access, Palo Alto Networks PAN-OS.

How do I fix CVE-2024-3393?

Upgrade affected software to a fixed version, for example Palo Alto Networks PAN-OS 11.2.3 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2024-3393 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. Because it is on the CISA KEV list, Secuno flags any affected asset as top-priority automatically. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

See how prioritisation worksBook a demo

Get Patch this first every Monday

Five vulnerabilities that matter this week, ranked on real exploitation. Plain language, one email, no spam.

You can unsubscribe with one click from every issue. We handle your details as described in our privacy policy.

Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.