Juniper Junos OS SRX Series Missing Authentication for Critical Function Vulnerability

Juniper Junos OS on SRX Series contains a missing authentication for critical function vulnerability that allows an unauthenticated, network-based attacker to cause limited impact to the file system integrity. With a specific request to user.php that doesn't require authentication, an attacker is able to upload arbitrary files via J-Web, leading to a loss of integrity for a certain part of the file system, which may allow chaining to other vulnerabilities. CISA required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.