In this we get a :
ELF 64-bit LSB shared object, x86-64, version 1 (SYSV), dynamically linked, interpreter /lib64/ld-linux-x86-64.so.2, BuildID[sha1]=89d54c514d9f6bec697e52edfee4a495266b3577, for GNU/Linux 3.2.0, with debug_info, not stripped
and when running the binary we get a segmentation fault. which on anaysis seems to be caused by foo() function.
And this was really easy for me, as i like binary patching and this just needed 2 clean patches either in JE and JNE instructions or the imm. value of MOV opcode.
Let's see the CG of the binary :
And running the binary after that gave us the flag, just like that.
