Major Palo Alto security flaw is being exploited via Python zero-day backdoor

For weeks now, unidentified threat actors have been leveraging a critical zero-day vulnerability in Palo Alto Networks’ PAN-OS software, running arbitrary code on vulnerable firewalls, with root privilege.  Multiple security researchers have flagged the campaign, including Palo Alto Networks’ own Unit 42, noting a single threat actor group has been abusing a vulnerability called command…