Known exploited vulnerability
CVE-2024-3393
The short answer
CVE-2024-3393 affects Palo Alto Networks Cloud NGFW and is rated high (CVSS 8.7). CISA added it to the Known Exploited Vulnerabilities catalog on 2024-12-30: attackers are using it, so patch it first.
What it is
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.
Weakness: CWE-754.
Severity
8.7 high
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:N/R:U/V:C/RE:M/U:Amber
Exploited (CISA KEV)
Yes, since Dec 30, 2024
Federal due date Jan 20, 2025
EPSS, next 30 days
30%
Higher than 98% of scored CVEs
How it can be exploited
- Attack vector
- Network
- Attack complexity
- Low
- Attack requirements
- None
- Privileges required
- None
- User interaction
- None
- Confidentiality impact
- None
- Integrity impact
- None
- Availability impact
- High
What CISA says to do
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Affected products
Cloud NGFW, PAN-OS. NVD's record lists the exact affected versions.
References
- security.paloaltonetworks.com/CVE-2024-3393 Vendor Advisory
- www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2024-3393 US Government Resource
Questions
Is CVE-2024-3393 being exploited?
Yes. CISA added CVE-2024-3393 to its Known Exploited Vulnerabilities catalog on 2024-12-30, with a federal remediation due date of 2025-01-20.
How do I fix CVE-2024-3393?
CISA's required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
From NVD, CISA KEV, FIRST EPSS and OSV.dev, checked . Status on NVD: Analyzed. The description is NVD's text, quoted as published.
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