Practicing buffer overflow attack in Ubuntu

Question

I am trying to learn to use buffer overflow attack in Ubuntu. Unfortunately, I cannot turn off Address Space Layout Randomization (ASLR) feature in this OS, which is turned on b

Answer 1

You can turn off ASLR for a particular process by launching with setarch

For 32 bit programs:

setarch i386 -R yourProgram

For 64 bit programs:

setarch x86_64 -R yourProgram

Answer 2

to echo to files with root acces using sudo you can use the following code:

echo "0" | sudo tee /proc/sys/kernel/randomize_va_space

Answer 3

You will need root perms before attempting it, and if I'm not mistaken, to restart once you've done it.

 sudo -i
 echo "0" > /proc/sys/kernel/randomize_va_space

Answer 4

found it myself

you have to compile this way:

gcc -fno-stack-protector -z execstack -o OUTPUT INPUT.c

Answer 5

gcc compile with -fno-stack-protector