Challenge Overview
Can you get the flag?
Download this binary.
Here's the test drive instructions:
- $ chmod +x gdbme
- $ gdb gdbme
- (gdb) layout asm
- (gdb) break *(main+99)
- (gdb) run
- (gdb) jump *(main+104)
Solution
wget https://artifacts.picoctf.net/c/85/gdbme
After getting the file it is really just running the commands that they said in the instructions.
sudo chmod +x gdbmegdb gdbme(gdb) layout asm(gdb) break *(main+99)
(gdb) run(gdb) jump *(main+104)
Then the flag is presented after you jump to main+104 skipping the sleep.
Flag: picoCTF{d3bugg3r_dr1v3_197c3...}