Policy-based intrusion detection in Web applications by monitoring Java information flows

This article focuses on intrusion detection in systems using Web applications and COTS. We present a solution that combines policy-based intrusion detection and information flow control. We describe JBlare, an inline Java monitor that tracks inter-method flows in Java applications. This monitor collaborates with Blare, a monitor that tracks information flow in the whole system at the OS-level. The combination of these two detectors constitutes a policy-based Intrusion Detection System that can address a wide range of attacks.