Juniper Junos OS EX Series and SRX Series PHP External Variable Modification Vulnerability

Juniper Junos OS on EX Series and SRX Series contains a PHP external variable modification vulnerability that allows an unauthenticated, network-based attacker to control an important environment variable. Using a crafted request, which sets the variable PHPRC, an attacker is able to modify the PHP execution environment allowing the injection und execution of code. CISA required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.