UPDATE: Palo Alto Networks confirmed on Tuesday (4/16) that disabling device telemetry is no longer considered an effective mitigation. On Wednesday (4/17), the company released new threat signatures and shared a CLI command customers can used to identify indicators of exploit activity on the device. Please visit their page here to stay updated: https://security.paloaltonetworks.com/CVE-2024-3400
Palo Alto Networks also reiterated that firewalls with those specific PAN-OS versions are vulnerable if configured with GlobalProtect gateway or GlobalProtect portal (or both).
Overview
A command injection vulnerability has been discovered in the GlobalProtect feature within Palo Alto Networks PAN-OS software for specific versions that have distinct feature configurations that may enable a remote, unauthenticated attacker to execute arbitrary code with root privileges on the firewall.
These specific versions require configurations for GlobalProtect gateway and device telemetry enabled. This vulnerability has also been added to the Known Exploited Vulnerabilities Catalog, maintained by CISA, as there have been limited exploitations of CVE-2024-3400 in the wild.
Technical Details
A command injection vulnerability has been discovered in:
- PAN-OS 11.1 versions < 11.1.2-h3 (>= 11.1.2-h3 unaffected, Patch ETA by 4/14)
- PAN-OS 11.0 versions < 11.0.4-h1 (>= 11.0.4-h1 unaffected, Patch ETA by 4/14)
- PAN-OS 10.2 versions < 10.2.9-h1 (>= 10.2.9-h1 unaffected, Patch ETA by 4/14)
This vulnerability does not affect PAN-OS versions 10.1, 10.0, 9.1, and 9.0, Cloud NGFW, Panorama appliances, insert "or Prisma Access"or Prisma Access.
In the impacted versions listed above, firewalls are required to have configurations for both GlobalProtect gateway and device telemetry enabled. To verify if you have GlobalProtect gateway configured, check for entries in your firewall web interface (Network > GlobalProtect > Gateways). To verify if you have device telemetry enabled, check your firewall web interface (Device > Setup > Telemetry).
Palo Alto also noted this vulnerability has been seen in limited attacks in the wild but has not released the details of these attacks. At this time, there are no further technical details related to this vulnerability. A proof of concept (PoC) has not been observed publicly or in the underground at this time.
Per Palo Alto’s advisory on CVE-2024-3400, if a client is concerned that this vulnerability has compromised their devices, the client can open a support case with Palo Alto to determine if the devices’ logs match known IoCs for this vulnerability.
Mitigations
- Customers with a Threat Prevention subscription can block attacks for this vulnerability by enabling Threat ID 95187.
- Ensure vulnerability protection has been applied to their GlobalProtect interface to prevent the exploitation of this issue on their device. More information can be found here.
- If you are unable to apply the Threat Prevention based mitigation, you can temporarily disable device telemetry until a patch is released to fix this vulnerability. Once a patched version is released and installed, device telemetry should be re-enabled on the device. For instructions on how to temporarily disable device telemetry, click here.
- Patches for this vulnerability are expected to be available to customers by April 14, 2024. Once these patches are available, update impacted devices as soon as possible.
IoCs
Trustwave is currently monitoring this situation and will update this post as needed.
