Dowsing for Overflows: A Guided Fuzzer to Find Buffer Boundary Violations

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Provided by: Vienna University of Economics and Business
Topic: Security
Format: PDF
Dowser is a 'Guided' fuzzer that combines taint tracking, program analysis and symbolic execution to find buffer overflow and underflow vulnerabilities buried deep in a program's logic. The key idea is that analysis of a program lets the users pinpoint the right areas in the program code to probe and the appropriate inputs to do so. Intuitively, for typical buffer overflows, they need consider only the code that accesses an array in a loop, rather than all possible instructions in the program. After finding all such candidate sets of instructions, they rank them according to estimation of how likely they are to contain interesting vulnerabilities.
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