All Questions
Tagged with exploit-developmentrop
9 questions
1vote
2answers
1kviews
Rop: Handling a `push` in the middle of a gadget
In rop, often a gadget has an undesired pop or push in the middle. For a pop, we handle this simply by adding a dummy value to our chain: it is popped, and all is well. What about a push: What do we ...
- 307
1vote
2answers
686views
How do attackers determine ROP gadgets remotely?
Being gadgets change per each system and architecture (do they?), how would an attacker be able to determine the offsets of various Return Oriented Programming gadgets, would an attacker first need to ...
- 11
1vote
1answer
1kviews
Understanding ret2libc return address location
I recently was studying x86 buffer overflows + ret2libc attacks from https://www.ret2rop.com/2018/08/return-to-libc.html and I noticed the order is as follows: bytes to fill buffer + address of system ...
- 13
0votes
1answer
416views
Is it possible to use ROP to call legitimate functions even if the stack is not executable?
I read about the hardware protection that blocks the CPU from jumping to stack address. But hacker may still edit the return address to an address in code memory that shouldn't run at that moment. For ...
- 13
2votes
1answer
2kviews
segmentation fault at strcpy while perforforming a buffer overflow
I have this code that I need to use to perform a ret2libc #include <stdio.h> #include <string.h> int main(int argc, char *argv[]) { char buf[256]; printf("buff is at:%p\n",buf); ...
- 23
2votes
1answer
505views
How to use "jmp" in ROP
I'm trying to put together a ROP chain. I'm looking for a gadget to do the following: mov rdi, rdx ; mov rbp, rsp ; ret; But instead, I have a gadget like this : mov rdi, rdx ; mov rbp, rsp ; jmp ...
- 31
2votes
2answers
2kviews
Cannot build a ROP chain
My ROP exploit crashes with segmentation fault for unknown reason. This is a vulnerable code (compiled via command gcc h2.c -no-pie -fno-stack-protector -m32 -o h2): #include <stdio.h> #include &...
- 59
1vote
1answer
698views
Remote Buffer Overflow w/out Memory Leak
I'm working on an exploit development challenge right now in which I've been presented with a compiled binary and I have to exploit it on a remote server. No stack protections have been enabled and ...
- 376
3votes
1answer
3kviews
Why ret2libc is not working in the below code on x86_64?
I am trying to bypass DEP in x86_64 (64 bit - ASLR OFF). I have my own vulnerable code and I have also written an exploit code with a basic ROP to jump into system() with parameter "/bin/sh",...
- 51
