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Palo Alto Networks has given urgent advice to the remediation of a critical vulnerability, known as CVE-2024-3400, which attackers have used to get unauthorized access.
The cybersecurity company has provided clear steps for organizations to reduce the risks of this breach and protect their networks from future attacks.
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Palo Alto Firewalls
PAN-OS 10.2.x, 11.0.x, 11.1.x (Refer to the Palo Alto Networks Security Advisory for the affected versions)
CVE-2024-3400
GlobalProtect
Procedure:
Level 0 Probe: Unsuccessful exploitation attempt
Suggested Remediation: Update to the latest PAN-OS hotfix.
As best practice to secure running-configs, create a master key and elect AES-256-GCM.
Reason for suggested remediation: PAN-OS hotfixes sufficiently fix the vulnerability. Private Data reset or Factory reset is not suggested as there is no indication of a compromise.
Level 1 Test:
Vulnerability being tested on the device, a 0-byte file has been created and is resident on the firewall, no indication of any known unauthorized command execution.
Suggested Remediation: Update to the latest PAN-OS hotfix.
As best practice to secure running-configs, create a master key and elect AES-256-GCM.
Reason for suggested remediation: PAN-OS hotfixes sufficiently fix the vulnerability. Private data reset or factory reset is not suggested as there is no indication of any known unauthorized command execution or exfiltration of files.
Level 2 Potential Exfiltration:
A file on the device has been copied to a location accessible via a web request, though the file may or may not have been subsequently downloaded. Typically, the file we have observed being copied is running_config.xml. The suggested remediation will eliminate the possibility of capturing forensic artifacts.
Suggested Remediation: Update to the latest PAN-OS hotfix and perform a Private Data Reset
How To Perform Private Data Reset and Factory Reset as part of CVE-2024-3400 Level 2 and Level 3 Remediation
Reason for suggested remediation: Performing a private data reset eliminates risks of potential misuse of device data.
Level 3 Interactive access:
Interactive command execution: May include shell-based back doors, introduction of code, pulling files, running commands. The suggested remediation will eliminate the possibility of capturing Forensic Artifacts.
Suggested Remediation: Update to the latest PAN-OS hotfix and perform a Factory Reset
How to Perform Private Data Reset and Factory Reset as part of CVE-2024-3400 Level 2 and Level 3 Remediation
Reason for suggested remediation: A factory reset is recommended due to evidence of more invasive threat actor activity.
