All Questions
Tagged with exploit-developmentstack-overflow
8 questions
1vote
0answers
38views
Can't print hexadecimal formatted address in buffer overflow
I'm trying to overwrite the return address caused by a buffer overflow. I've already calculated the distance between the buffer and the return address. The address that I want to jump to is ...
- 81
2votes
1answer
745views
Exploit education stack-five: trouble opening shell
Im trying the phoenix vm, challenge stack-five on exploit.education (http://exploit.education/phoenix/stack-five/). I run onto a problem while exploiting a stack overflow. The challenge is run execve('...
- 23
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
10votes
2answers
8kviews
Why must a ret2libc attack follow the order "system(),exit(),command?
In a ret2libc attack, I understand that the return address can be overwritten with the address of the system command, which takes a command string as an argument. In this case, shouldn't the address ...
- 439
5votes
1answer
5kviews
Exploit does not work outside GDB
I already tried various solutions provided to other "exploit doesn't work outside gdb" questions (r.sh, invoke.sh, removing environment variables) and at this point I legit have no idea why the ...
- 123
2votes
1answer
2kviews
Stackpivoting techniques
I'm practicing exploit development and one of the scenario I am haing most difficulties with is stack pivoting besides the "ADD ESP, XXX" or something like that. The question is, during the writing ...
- 171
3votes
1answer
345views
Smashing stack in x86_64
Exploiting functions like strcpy() relies on the fact that the payload string must not contain zero bytes that would terminate the copy function. If the payload contains x86_64 addresses (e.g. in ...
- 273
2votes
1answer
187views
Understanding a crash
Say you're fuzzing a Windows x32 application for a file format bug and, say, you found a pattern that causes the application to crash. My normal steps are: load application into a debugger generate ...
- 171
