Abstract:Many bugs in protocol implementations may only manifest when the system is in a particular "state". For instance, to trigger one of the bugs we found in an RTSP implementation, the fuzzer must first send two different types of messages to usher the protocol implementation from the INIT via the READY to the PLAY state where the bug is exposed. Without knowledge of the protocol, it is inherently difficult for a fuzzer to discover such stateful bugs. A key challenge in fuzzing stateful systems, therefore, is to c… Show more
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