To verify results manually, VDA Labs downloaded crash files of interest, and then ran them with a local debugger. This is one of the most reliable methods for bad actors to gain unauthorized access to a computer. If the stack buffer is filled with data from a bad actor, then that user can potentially inject executable code into the running program and take control of the process. Mayhem condensed these countless crashes into three unique defects, including a stack overflow condition in a local variable.Ī stack overflow occurs when a particular computer program tries to use more memory space than the call stack has available. Mayhem will substitute this when it begins the fuzzing process - mutating the file along the way.ĭuring the fuzz test of the MP3Gain utility, VDA Labs discovered nearly 1,600 crash conditions out of over 6,000 test suites. The at the end of the command is the placeholder for the file input being passed to the command during each iteration of fuzzing. This is the actual Linux command Mayhem will execute and fuzz inside the Docker build.
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