10/15/2023 0 Comments Buffer overflow attack historyX/120x $esp : to see the 120 values in stack pointer GDB: GDB, the GNU Project debugger, allows to see what is going on `inside’ another program while it executes and/or what another program was doing at the moment it crashed.Ĭommands of gdb which we are going to use in this case: Find the return address: We will try to find this but before that let’s try to understand few commands Understanding commands and terms Find the overflow point: In this case, we need 305 bytes to overflow. The attack has been demonstrated and explained in the videoĪs the wiki says, buffer overflow is an anomaly where a program, while writing data to a buffer, overruns the buffer’s boundary and overwrites adjacent memory locations.ġ. If this overwrites adjacent data or executable code, this may result in erratic program behavior, including memory access errors, incorrect results, and crashes. Buffer overflows can often be triggered by malformed inputs if one assumes all inputs will be smaller than a certain size and the buffer is created to be that size, if an anomalous transaction produces more data it could cause it to write past the end of the buffer. In computer security and programming, a buffer overflow, or buffer overrun, is an anomaly where a program, while writing data to a buffer, overruns the buffer’s boundary and overwrites adjacent memory locations.īuffers are areas of memory set aside to hold data, often while moving it from one section of a program to another, or between programs. This challenge was part of the SysSec (System Security) Course. In this blog, I will try to solve one of the challenge which was given to me by my professor Aurélien Francillon during my masters from EURECOM, Sophia Antipolis, France. Well, this applies even to the buffer, which leads to Buffer Overflow Attack. My mom used to say “Too much of anything is harmful”.
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