Fast and space-efficient defense against jump-oriented programming attacks

Recently, Jump-oriented Programming (JOP) attack has become widespread in various systems including server, desktop, and smart devices. JOP attack rearranges existing code snippets in program to make gadget sequences, and hijacks control flow of program by chaining and executing gadget sequences consecutively. However, existing defense schemes have limitations such as high execution overhead, high binary size increase overhead, and low applicability. In this paper, to solve these problems, we introduce target shepherding, which is a fast and space-efficient defender against general JOP attack. Our defense scheme generates monitoring code to determine whether the target is legitimate or not just before each indirect jump instruction at compile time, and then checks whether a control flow has been subverted by JOP attack at run time. We achieved very low run-time overhead with very small increase in file size. In our experimental results, the performance overhead is 2.36% and the file size overhead is 5.82% with secure execution.