Palo Alto Networks is aware of a memory corruption vulnerability in PAN-OS. (Ref: # PAN-123700/ CVE-2019-1582). Successful exploitation of this issue may allow an administrative user to cause arbitrary memory corruption by rekeying the current client interactive session. This issue affects PAN-OS 8.1.9 and earlier, and PAN-OS 9.0.3 and earlier. PAN-OS 7.1 and 8.0 are NOT affected.
Work around: These issues affect the management interface of PAN-OS and are strongly 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 9.0 technical documentation, available at: https://docs.paloaltonetworks.com/pan-os/9-0/pan-os-admin/getting-started/best-practices-for-securing-administrative-access.html.