Buffer Overflows Stack and Heap Manupulation

Many overflows occur when the program receives more data than it expects . The types of overflows are

1. Stack overflows .
2. Integer overflows.
3. Heap overruns.
4. Format string attacks.

• Stack overflows : occur when variable size data is copied into fixed length buffers located on the program stack without any bounds checking.


• Integer overflows: Integer overflows occur when a specific data type or CPU register meant to hold values within a certain range is assigned a value outside that range.


• Heap overruns: Heap overrun occurs when data is written on outside of the space(Heap)


• Format string attacks :Format string attacks occur when the %n parameter of the format string is used to write data outside the target buffer