November 2017
Intermediate to advanced
226 pages
5h 59m
English
Content preview from Python Penetration Testing Cookbook
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Structured Exception Handling
The Structured Exception Handling (SEH) is a protection mechanism to prevent the buffer overflows. SEH uses a linked list as it contains a sequence of data records. When an exception occurs, the OS will go through this list and check for the suitable exception function. For this, the exception handler requires a pointer to the current exception registration record (SEH) and another pointer to the next exception registration record (nSEH). As the Windows stack grows downwards, the order will be reversed:
So, if we can overwrite the SEH with a POP POP RETN instruction, the POP will remove four bytes from the top ...
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