I’m following these lessons from OpenSecurityTraining.
I’ve reached the lab part where I’ve to train myself on a CMU Bomb. They provide a x86_64 compiled CMU Bomb that you can find here to train on : CMU Bomb x86-64 originally from a 32-bit bomb from CMU Labs for Computer Systems: A Programmer’s Perspective (CS:APP) 1st edition.
I had a virtualized 64 bits Elementary OS distribution where I disassembled the CMU Bomb without problems using GDB. Now, I’ve a 64 bits Ubuntu 14.04 LTS (not virtualized) and when I try to reproduce why I did on my Elementary OS, I get the famous error.
I run these commands :
gdb ./bomb-x64 (gdb) b main Breakpoint 1 at 0x400dbd: file bomb.c, line 37. -- why bomb.c ? (gdb) r ... bomb.c: no such file or directory
Edit : I can create breakpoints on others functions of the CMU Bomb and it works as expected.
(gdb) b phase_1 Breakpoint 3 at 0x400f00 (gdb) r Breakpoint 1, 0x0000000000400f00 in phase_1 () (gdb) disas Dump of assembler code for function phase_1: => 0x0000000000400f00 <+0>: sub $0x8,%rsp 0x0000000000400f04 <+4>: mov $0x4023b0,%esi 0x0000000000400f09 <+9>: callq 0x401308 <strings_not_equal> 0x0000000000400f0e <+14>: test %eax,%eax 0x0000000000400f10 <+16>: je 0x400f17 <phase_1+23> 0x0000000000400f12 <+18>: callq 0x40140a <explode_bomb> 0x0000000000400f17 <+23>: add $0x8,%rsp 0x0000000000400f1b <+27>: retq End of assembler dump.
I’ve heard of ia32-libs but this doesn’t do anything more since I’m on 64bits Ubuntu and run a 64bits compiled CMU Bomb, am I wrong ?