How can I debug program linking specific version of shared library?

Question

helloworld.c:

int main(){}

[1] 9845 illegal hardware instruction (core dumped) LD_PRELOAD=./libc.so.6 ./helloworld

This preload libc is an old version of glibc

Can I debug helloworld linking it on my system?

Or is there a fast way to deploy a virtual machine with the specific version of shared libraries?

score 0 · Answer 1 · answered Jun 27 '16 at 00:52

0

From your post I could see POC dumping core. So, better use gdb to analyze the coredump and see the crashing callstack. Make sure you load the right libc in gdb while analyzing coredump.
Else use LD_DEBUG=all before invoking POC and see if any pointers to crash by seeing the details during runtime.

answered Jun 27 '16 at 00:52

Nikhil A R

Sorry I misled you. POC dumping core? No. I ran vulnerable. I didn't ran POC. And I just understand it's not about POC at all. I updated my post. Thank you! – Donald Wu Jun 27 '16 at 16:47

score 0 · Accepted Answer · edited May 23 '17 at 12:13

0

Can I debug helloworld linking it on my system?

Yes, but you need to do it correctly. This answer provides details, and an explanation for why your LD_PRELOAD didn't work.

edited May 23 '17 at 12:13

Community

answered Jun 28 '16 at 20:21

Employed Russian

2 Answers2