Command Injection in PAN-OS (PAN-SA-2017-0028)

Last revised: 01/09/2018

Summary

A vulnerability exists in the PAN-OS web interface packet capture management that could allow an authenticated user to inject arbitrary commands. (Ref # PAN-81892 / CVE-2017-15940)

Severity: High

PAN-OS contains a vulnerability that may allow for post authentication command injection

Products Affected

PAN-OS 6.1.18 and earlier, PAN-OS 7.0.18 and earlier, PAN-OS 7.1.13 and earlier, PAN-OS 8.0.6 and earlier

Available Updates

PAN-OS 6.1.19 and later, PAN-OS 7.0.19 and later, PAN-OS 7.1.14 and later, PAN-OS 8.0.6-h3 and later

Workarounds and Mitigations

Palo Alto Networks has released content update 765 including vulnerability signatures #30998 that can be used as an interim mitigation to protect PAN-OS devices until the device software is upgraded. Note that signatures 30998 must be applied to a firewall rule securing traffic destined for the Management interface. This issue affects the management interface of the device and is strongly mitigated by following best practices for the isolation of management interfaces for security appliances. We recommend that the management interface be isolated and strictly limited only to security administration personnel through either network segmentation or using the IP access control list restriction feature within PAN-OS. An alternative mitigation includes the use of a Panorama central manager and disabling of http and https management on each of the vulnerable appliance, then use the Panorama context switching feature to remotely access the web interface of the device.

Acknowledgements

Palo Alto Networks would like to thank Won Lae Lee and Hwang, Gyu Won from Samsung for reporting this issue