Phusion Passenger Incorrect Permission Assignment for Critical Resource Vulnerability - CVE-2018-12028

An Incorrect Access Control vulnerability in SpawningKit in Phusion Passenger 5.3.x before 5.3.2 allows a Passenger-managed malicious application upon spawning a child process to report an arbitrary different PID back to Passenger39s process manager. If the malicious application then generates an error it would cause Passenger39s process manager to kill said reported arbitrary PID.