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This paper introduces YARRA, a conservative extension to C to protect applications from non-control data attacks. YARRA programmers specify their data integrity requirements by declaring critical data types and ascribing these critical types to important data structures. YARRA guarantees that such critical data is only written through pointers with the given static type. Any attempt to write to critical data through a pointer with an invalid type (perhaps because of a buffer overrun) is detected dynamically.
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