CVE-2024-3393

PAN-OS: Firewall Denial of Service (DoS) in DNS Security Using a Specially Crafted Packet

CVSS 4.0 High 8.7Known exploited (CISA KEV)

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/AU:N/R:U/V:C/RE:M/U:Amber

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.

Key data

CVSS 4.0 High 8.7

Score published by palo_alto in the CVE record.

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/AU:N/R:U/V:C/RE:M/U:Amber

Attack vector: Network
The vulnerable component can be reached over a network, possibly from the Internet.
Attack complexity: Low
No measurable action is needed to get around the system's built-in security controls. The attack is repeatable.
Attack requirements: None
The attack works without any special deployment or execution conditions.
Privileges required: None
No account or privileges are needed.
User interaction: None
No action from any user is needed.
Vulnerable system: confidentiality: None
No effect on the secrecy of data.
Vulnerable system: integrity: None
No effect on the trustworthiness of data.
Vulnerable system: availability: High
Serious or total effect on availability.
Subsequent systems: confidentiality: None
No effect on other systems' data secrecy.
Subsequent systems: integrity: None
No effect on other systems' data trustworthiness.
Subsequent systems: availability: Low
Limited effect on other systems' availability.

Metric	Value	What it means
Attack vector	Network	The vulnerable component can be reached over a network, possibly from the Internet.
Attack complexity	Low	No measurable action is needed to get around the system's built-in security controls. The attack is repeatable.
Attack requirements	None	The attack works without any special deployment or execution conditions.
Privileges required	None	No account or privileges are needed.
User interaction	None	No action from any user is needed.
Vulnerable system: confidentiality	None	No effect on the secrecy of data.
Vulnerable system: integrity	None	No effect on the trustworthiness of data.
Vulnerable system: availability	High	Serious or total effect on availability.
Subsequent systems: confidentiality	None	No effect on other systems' data secrecy.
Subsequent systems: integrity	None	No effect on other systems' data trustworthiness.
Subsequent systems: availability	Low	Limited effect on other systems' availability.

CVSS 4.0 High 7.1

Score published by palo_alto in the CVE record.

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/AU:N/R:U/V:C/RE:M/U:Amber

Attack vector: Network
The vulnerable component can be reached over a network, possibly from the Internet.
Attack complexity: Low
No measurable action is needed to get around the system's built-in security controls. The attack is repeatable.
Attack requirements: None
The attack works without any special deployment or execution conditions.
Privileges required: Low
A basic user account is needed.
User interaction: None
No action from any user is needed.
Vulnerable system: confidentiality: None
No effect on the secrecy of data.
Vulnerable system: integrity: None
No effect on the trustworthiness of data.
Vulnerable system: availability: High
Serious or total effect on availability.
Subsequent systems: confidentiality: None
No effect on other systems' data secrecy.
Subsequent systems: integrity: None
No effect on other systems' data trustworthiness.
Subsequent systems: availability: Low
Limited effect on other systems' availability.

Metric	Value	What it means
Attack vector	Network	The vulnerable component can be reached over a network, possibly from the Internet.
Attack complexity	Low	No measurable action is needed to get around the system's built-in security controls. The attack is repeatable.
Attack requirements	None	The attack works without any special deployment or execution conditions.
Privileges required	Low	A basic user account is needed.
User interaction	None	No action from any user is needed.
Vulnerable system: confidentiality	None	No effect on the secrecy of data.
Vulnerable system: integrity	None	No effect on the trustworthiness of data.
Vulnerable system: availability	High	Serious or total effect on availability.
Subsequent systems: confidentiality	None	No effect on other systems' data secrecy.
Subsequent systems: integrity	None	No effect on other systems' data trustworthiness.
Subsequent systems: availability	Low	Limited effect on other systems' availability.

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EPSS

Exploit Prediction Scoring System by FIRST: an estimate of the probability that exploitation activity will be observed in the next 30 days.

Score: 0.30218 (30.2% probability)
Percentile: 98.2%
Scores of: Nov 10, 2026
Model: v2026.06.15

CISA Known Exploited Vulnerabilities

This CVE is listed in the CISA KEV catalog.

Name in the catalog: Palo Alto Networks PAN-OS Malicious DNS Packet Vulnerability
Added to the catalog: Dec 30, 2024
Federal due date: Jan 20, 2025

CISA assessment as of Jan 9, 2025

Stakeholder-Specific Vulnerability Categorization (SSVC) decision points added by CISA.

Exploitation: Recorded by CISA as active
Automatable: yes
Technical impact: partial

Weakness (CWE)

CWE catalog version 5.0.

CWE-754Improper Check for Unusual or Exceptional Conditions

Affected products

Products listed in the CVE record, as the CNA published them.

Palo Alto Networks PAN-OS
- affected: 11.2.0 up to before 11.2.3
- affected: 11.1.0 up to before 11.1.2-h16
- affected: 10.2.8 up to before 10.2.8-h19
- affected: 10.1.14 up to before 10.1.14-h8
Palo Alto Networks PAN-OS
- unaffected: 10.2.0 up to before 10.2.8
- affected: 11.2.0 up to before 11.2.3

Listed as not affected

Palo Alto Networks Cloud NGFW

References

Links listed in the CVE record. They lead to other sites, which CubePath does not control.

security.paloaltonetworks.com/CVE-2024-3393vendor-advisory

Timeline

ID reservedApr 5, 2024
Record publishedDec 27, 2024
Added to CISA KEVDec 30, 2024
Record last updatedOct 21, 2025

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About CubePath

CubePath is a cloud provider with data centers in Europe and the United States. It offers VPS, bare metal servers and DDoS protection.

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Data from the CVE Program (MITRE), CISA KEV and FIRST EPSS. CVSS is owned by FIRST and used by permission. Not affiliated with or endorsed by MITRE, CISA or FIRST. Data as of Nov 10, 2026, 19:20 UTC. Sources and licenses