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Exploited vulnerability · CISA KEV

Is CVE-2024-3393 exploited? Yes: in CISA KEV since 30 Dec 2024

Gociux · Palo Alto Networks PAN-OS · data: CISA KEV, CVE record, FIRST EPSS

Yes. CVE-2024-3393, Palo Alto Networks PAN-OS Malicious DNS Packet Vulnerability, is being exploited in the wild. CISA added it to its Known Exploited Vulnerabilities catalog on 30 Dec 2024, 3 days after it was published. It affects Palo Alto Networks PAN-OS, an internet-facing product of the kind attackers use for initial access. If you run it, CISA's required action is: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

exploitedYesCISA KEV · 30 Dec 2024
ransomwareNot knownno confirmed use
EPSStop 5%very likely to be exploited
severity8.7CVSS 4.0 · high
US federal due20 Jan 2025BOD 22-01 deadline

What it is

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.

VendorPalo Alto Networks (16 exploited CVEs in KEV)
ProductPAN-OS
VulnerabilityPalo Alto Networks PAN-OS Malicious DNS Packet Vulnerability
WeaknessCWE-754
Published27 Dec 2024
Added to KEV30 Dec 2024
Reported by (CNA)palo_alto

What to do

  1. Check whether you run it. Look for PAN-OS in your asset inventory, including appliances and cloud images. Stack check lists every exploited Palo Alto Networks CVE at once.
  2. Apply the fix. Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
  3. If you can't patch today, take the affected service off the internet or restrict who can reach it, and check its logs for signs of compromise since 27 Dec 2024.
  4. Get told next time. Email alerts when CISA adds a CVE for Palo Alto Networks.

Other exploited CVEs in PAN-OS

References

Questions

Is CVE-2024-3393 being exploited?

Yes. CISA added CVE-2024-3393 to the Known Exploited Vulnerabilities catalog on 30 Dec 2024, which means there is reliable evidence of exploitation in the wild.

Is CVE-2024-3393 used in ransomware attacks?

CISA does not list known ransomware use for it. That can change, and exploitation alone is reason to fix it first.

How do I fix CVE-2024-3393?

Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable. Check Palo Alto Networks's advisory for the fixed versions, and if you can't patch quickly, restrict access to the affected PAN-OS and watch it for signs of compromise.

Sources: CISA KEV (exploitation, ransomware use, required action, due date), the CVE record (publication date, CVSS, CNA), NVD and FIRST EPSS (live score). More: all KEV additions in December 2024 · Palo Alto Networks scorecard · act-now radar.

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