PAN-OS: Shell injection vulnerability in PAN-OS CLI allows execution of shell commands

A shell command injection vulnerability in the PAN-OS CLI allows a local authenticated user to escape the restricted shell and escalate privileges.
This issue affects only PAN-OS 8.1 versions earlier than PAN-OS 8.1.13.
This issue does not affect PAN-OS 7.1, PAN-OS 9.0, or later PAN-OS versions.

Work around:
This issue affects the management interface of PAN-OS and is mitigated by following best practices for securing the PAN-OS management interface. Our best practices guidelines reduce the exposure of the management interface to potential attackers. Please review the Best Practices for Securing Administrative Access in the PAN-OS 8.1 technical documentation, available at: https://docs.paloaltonetworks.com/pan-os/8-1/pan-os-admin/getting-started/best-practices-for-securing-administrative-access.