ret2libc example using pico CTF challenge "here's a libc" скачать в хорошем качестве

ret2libc example using pico CTF challenge "here's a libc"

Ret2libc is a technique used in computer security to exploit a buffer overflow vulnerability in a program. When a buffer overflow occurs, an attacker can overwrite the return address on the stack to redirect the program's control flow to execute arbitrary code. However, modern operating systems implement security measures such as data execution prevention (DEP) and address space layout randomization (ASLR) to prevent this kind of attack. DEP prevents code execution from memory pages marked as non-executable, while ASLR randomizes the location of key program components such as the stack and libc library in memory. Ret2libc allows an attacker to bypass these security measures by redirecting the program's control flow to execute code from the libc library, which is always loaded at a fixed address in memory. This technique involves overwriting the return address on the stack to point to a function in the libc library that the attacker wishes to execute, along with the necessary parameters. Once the function in libc has executed, the attacker can gain control of the program and execute their own malicious code. Ret2libc is a powerful technique that can be used to bypass many modern security measures, but it requires a deep understanding of the target system and its components.