first commit
This commit is contained in:
OPSXCQ
parent
985a5c928c
commit
f40a84879c
551 changed files with 72374 additions and 24 deletions
69
dvwa/vulnerabilities/brute/help/help.php
Normal file
69
dvwa/vulnerabilities/brute/help/help.php
Normal file
|
|
@ -0,0 +1,69 @@
|
|||
<div class="body_padded">
|
||||
<h1>Help - Brute Force (Login)</h1>
|
||||
|
||||
<div id="code">
|
||||
<table width='100%' bgcolor='white' style="border:2px #C0C0C0 solid">
|
||||
<tr>
|
||||
<td><div id="code">
|
||||
<h3>About</h3>
|
||||
<p>Password cracking is the process of recovering passwords from data that has been stored in or transmitted by a computer system.
|
||||
A common approach is to repeatedly try guesses for the password.</p>
|
||||
|
||||
<p>Users often choose weak passwords. Examples of insecure choices include single words found in dictionaries, family names, any too short password
|
||||
(usually thought to be less than 6 or 7 characters), or predictable patterns
|
||||
(e.g. alternating vowels and consonants, which is known as leetspeak, so "password" becomes "p@55w0rd").</p>
|
||||
|
||||
<p>Creating a targeted wordlists, which is generated towards the target, often gives the highest success rate. There are public tools out there that will create a dictionary
|
||||
based on a combination of company websites, personal social networks and other common information (such as birthdays or year of graduation).
|
||||
|
||||
<p>A last resort is to try every possible password, known as a brute force attack. In theory, if there is no limit to the number of attempts, a brute force attack will always
|
||||
be successful since the rules for acceptable passwords must be publicly known; but as the length of the password increases, so does the number of possible passwords
|
||||
making the attack time longer.</p>
|
||||
|
||||
<br /><hr /><br />
|
||||
|
||||
<h3>Objective</h3>
|
||||
<p>Your goal is to get the administrator’s password by brute forcing. Bonus points for getting the other four user passwords!</p>
|
||||
|
||||
<br /><hr /><br />
|
||||
|
||||
<h3>Low Level</h3>
|
||||
<p>The developer has completely missed out <u>any protections methods</u>, allowing for anyone to try as many times as they wish, to login to any user without any repercussions.</p>
|
||||
|
||||
<br />
|
||||
|
||||
<h3>Medium Level</h3>
|
||||
<p>This stage adds a sleep on the failed login screen. This mean when you login incorrectly, there will be an extra two second wait before the page is visible.</p>
|
||||
|
||||
<p>This will only slow down the amount of requests which can be processed a minute, making it longer to brute force.</p>
|
||||
|
||||
<br />
|
||||
|
||||
<h3>High Level</h3>
|
||||
<p>There has been an "anti Cross-Site Request Forgery (CSRF) token" used. There is a old myth that this protection will stop brute force attacks. This is not the case.
|
||||
This level also extends on the medium level, by waiting when there is a failed login but this time it is a random amount of time between two and four seconds.
|
||||
The idea of this is to try and confuse any timing predictions.</p>
|
||||
|
||||
<p>Using a <?php echo dvwaExternalLinkUrlGet( 'http://www.captcha.net/', 'CAPTCHA' ); ?> form could have a similar effect as a CSRF token.</p>
|
||||
|
||||
<br />
|
||||
|
||||
<h3>Impossible Level</h3>
|
||||
<p>Brute force (and user enumeration) should not be possible in the impossible level. The developer has added a "lock out" feature, where if there are five bad logins within
|
||||
the last 15 minutes, the locked out user cannot log in.</p>
|
||||
|
||||
<p>If the locked out user tries to login, even with a valid password, it will say their username or password is incorrect. This will make it impossible to know
|
||||
if there is a valid account on the system, with that password, and if the account is locked.</p>
|
||||
|
||||
<p>This can cause a "Denial of Service" (DoS), by having someone continually trying to login to someone's account.
|
||||
This level would need to be extended by blacklisting the attacker (e.g. IP address, country, user-agent).</p>
|
||||
</div></td>
|
||||
</tr>
|
||||
</table>
|
||||
|
||||
</div>
|
||||
|
||||
<br />
|
||||
|
||||
<p>Reference: <?php echo dvwaExternalLinkUrlGet( 'https://en.wikipedia.org/wiki/Password_cracking' ); ?></p>
|
||||
</div>
|
||||
68
dvwa/vulnerabilities/brute/index.php
Normal file
68
dvwa/vulnerabilities/brute/index.php
Normal file
|
|
@ -0,0 +1,68 @@
|
|||
<?php
|
||||
|
||||
define( 'DVWA_WEB_PAGE_TO_ROOT', '../../' );
|
||||
require_once DVWA_WEB_PAGE_TO_ROOT . 'dvwa/includes/dvwaPage.inc.php';
|
||||
|
||||
dvwaPageStartup( array( 'authenticated', 'phpids' ) );
|
||||
|
||||
$page = dvwaPageNewGrab();
|
||||
$page[ 'title' ] = 'Vulnerability: Brute Force' . $page[ 'title_separator' ].$page[ 'title' ];
|
||||
$page[ 'page_id' ] = 'brute';
|
||||
$page[ 'help_button' ] = 'brute';
|
||||
$page[ 'source_button' ] = 'brute';
|
||||
dvwaDatabaseConnect();
|
||||
|
||||
$method = 'GET';
|
||||
$vulnerabilityFile = '';
|
||||
switch( $_COOKIE[ 'security' ] ) {
|
||||
case 'low':
|
||||
$vulnerabilityFile = 'low.php';
|
||||
break;
|
||||
case 'medium':
|
||||
$vulnerabilityFile = 'medium.php';
|
||||
break;
|
||||
case 'high':
|
||||
$vulnerabilityFile = 'high.php';
|
||||
break;
|
||||
default:
|
||||
$vulnerabilityFile = 'impossible.php';
|
||||
$method = 'POST';
|
||||
break;
|
||||
}
|
||||
|
||||
require_once DVWA_WEB_PAGE_TO_ROOT . "vulnerabilities/brute/source/{$vulnerabilityFile}";
|
||||
|
||||
$page[ 'body' ] .= "
|
||||
<div class=\"body_padded\">
|
||||
<h1>Vulnerability: Brute Force</h1>
|
||||
|
||||
<div class=\"vulnerable_code_area\">
|
||||
<h2>Login</h2>
|
||||
|
||||
<form action=\"#\" method=\"{$method}\">
|
||||
Username:<br />
|
||||
<input type=\"text\" name=\"username\"><br />
|
||||
Password:<br />
|
||||
<input type=\"password\" AUTOCOMPLETE=\"off\" name=\"password\"><br />
|
||||
<br />
|
||||
<input type=\"submit\" value=\"Login\" name=\"Login\">\n";
|
||||
|
||||
if( $vulnerabilityFile == 'high.php' || $vulnerabilityFile == 'impossible.php' )
|
||||
$page[ 'body' ] .= " " . tokenField();
|
||||
|
||||
$page[ 'body' ] .= "
|
||||
</form>
|
||||
{$html}
|
||||
</div>
|
||||
|
||||
<h2>More Information</h2>
|
||||
<ul>
|
||||
<li>" . dvwaExternalLinkUrlGet( 'https://www.owasp.org/index.php/Testing_for_Brute_Force_(OWASP-AT-004)' ) . "</li>
|
||||
<li>" . dvwaExternalLinkUrlGet( 'http://www.symantec.com/connect/articles/password-crackers-ensuring-security-your-password' ) . "</li>
|
||||
<li>" . dvwaExternalLinkUrlGet( 'http://www.sillychicken.co.nz/Security/how-to-brute-force-http-forms-in-windows.html' ) . "</li>
|
||||
</ul>
|
||||
</div>\n";
|
||||
|
||||
dvwaHtmlEcho( $page );
|
||||
|
||||
?>
|
||||
42
dvwa/vulnerabilities/brute/source/high.php
Normal file
42
dvwa/vulnerabilities/brute/source/high.php
Normal file
|
|
@ -0,0 +1,42 @@
|
|||
<?php
|
||||
|
||||
if( isset( $_GET[ 'Login' ] ) ) {
|
||||
// Check Anti-CSRF token
|
||||
checkToken( $_REQUEST[ 'user_token' ], $_SESSION[ 'session_token' ], 'index.php' );
|
||||
|
||||
// Sanitise username input
|
||||
$user = $_GET[ 'username' ];
|
||||
$user = stripslashes( $user );
|
||||
$user = mysql_real_escape_string( $user );
|
||||
|
||||
// Sanitise password input
|
||||
$pass = $_GET[ 'password' ];
|
||||
$pass = stripslashes( $pass );
|
||||
$pass = mysql_real_escape_string( $pass );
|
||||
$pass = md5( $pass );
|
||||
|
||||
// Check database
|
||||
$query = "SELECT * FROM `users` WHERE user = '$user' AND password = '$pass';";
|
||||
$result = mysql_query( $query ) or die( '<pre>' . mysql_error() . '</pre>' );
|
||||
|
||||
if( $result && mysql_num_rows( $result ) == 1 ) {
|
||||
// Get users details
|
||||
$avatar = mysql_result( $result, 0, "avatar" );
|
||||
|
||||
// Login successful
|
||||
$html .= "<p>Welcome to the password protected area {$user}</p>";
|
||||
$html .= "<img src=\"{$avatar}\" />";
|
||||
}
|
||||
else {
|
||||
// Login failed
|
||||
sleep( rand( 0, 3 ) );
|
||||
$html .= "<pre><br />Username and/or password incorrect.</pre>";
|
||||
}
|
||||
|
||||
mysql_close();
|
||||
}
|
||||
|
||||
// Generate Anti-CSRF token
|
||||
generateSessionToken();
|
||||
|
||||
?>
|
||||
96
dvwa/vulnerabilities/brute/source/impossible.php
Normal file
96
dvwa/vulnerabilities/brute/source/impossible.php
Normal file
|
|
@ -0,0 +1,96 @@
|
|||
<?php
|
||||
|
||||
if( isset( $_POST[ 'Login' ] ) ) {
|
||||
// Check Anti-CSRF token
|
||||
checkToken( $_REQUEST[ 'user_token' ], $_SESSION[ 'session_token' ], 'index.php' );
|
||||
|
||||
// Sanitise username input
|
||||
$user = $_POST[ 'username' ];
|
||||
$user = stripslashes( $user );
|
||||
$user = mysql_real_escape_string( $user );
|
||||
|
||||
// Sanitise password input
|
||||
$pass = $_POST[ 'password' ];
|
||||
$pass = stripslashes( $pass );
|
||||
$pass = mysql_real_escape_string( $pass );
|
||||
$pass = md5( $pass );
|
||||
|
||||
// Default values
|
||||
$total_failed_login = 3;
|
||||
$lockout_time = 15;
|
||||
$account_locked = false;
|
||||
|
||||
// Check the database (Check user information)
|
||||
$data = $db->prepare( 'SELECT failed_login, last_login FROM users WHERE user = (:user) LIMIT 1;' );
|
||||
$data->bindParam( ':user', $user, PDO::PARAM_STR );
|
||||
$data->execute();
|
||||
$row = $data->fetch();
|
||||
|
||||
// Check to see if the user has been locked out.
|
||||
if( ( $data->rowCount() == 1 ) && ( $row[ 'failed_login' ] >= $total_failed_login ) ) {
|
||||
// User locked out. Note, using this method would allow for user enumeration!
|
||||
//$html .= "<pre><br />This account has been locked due to too many incorrect logins.</pre>";
|
||||
|
||||
// Calculate when the user would be allowed to login again
|
||||
$last_login = $row[ 'last_login' ];
|
||||
$last_login = strtotime( $last_login );
|
||||
$timeout = strtotime( "{$last_login} +{$lockout_time} minutes" );
|
||||
$timenow = strtotime( "now" );
|
||||
|
||||
// Check to see if enough time has passed, if it hasn't locked the account
|
||||
if( $timenow > $timeout )
|
||||
$account_locked = true;
|
||||
}
|
||||
|
||||
// Check the database (if username matches the password)
|
||||
$data = $db->prepare( 'SELECT * FROM users WHERE user = (:user) AND password = (:password) LIMIT 1;' );
|
||||
$data->bindParam( ':user', $user, PDO::PARAM_STR);
|
||||
$data->bindParam( ':password', $pass, PDO::PARAM_STR );
|
||||
$data->execute();
|
||||
$row = $data->fetch();
|
||||
|
||||
// If its a valid login...
|
||||
if( ( $data->rowCount() == 1 ) && ( $account_locked == false ) ) {
|
||||
// Get users details
|
||||
$avatar = $row[ 'avatar' ];
|
||||
$failed_login = $row[ 'failed_login' ];
|
||||
$last_login = $row[ 'last_login' ];
|
||||
|
||||
// Login successful
|
||||
$html .= "<p>Welcome to the password protected area <em>{$user}</em></p>";
|
||||
$html .= "<img src=\"{$avatar}\" />";
|
||||
|
||||
// Had the account been locked out since last login?
|
||||
if( $failed_login >= $total_failed_login ) {
|
||||
$html .= "<p><em>Warning</em>: Someone might of been brute forcing your account.</p>";
|
||||
$html .= "<p>Number of login attempts: <em>{$failed_login}</em>.<br />Last login attempt was at: <em>${last_login}</em>.</p>";
|
||||
}
|
||||
|
||||
// Reset bad login count
|
||||
$data = $db->prepare( 'UPDATE users SET failed_login = "0" WHERE user = (:user) LIMIT 1;' );
|
||||
$data->bindParam( ':user', $user, PDO::PARAM_STR );
|
||||
$data->execute();
|
||||
}
|
||||
else {
|
||||
// Login failed
|
||||
sleep( rand( 2, 4 ) );
|
||||
|
||||
// Give the user some feedback
|
||||
$html .= "<pre><br />Username and/or password incorrect.<br /><br/>Alternative, the account has been locked because of too many failed logins.<br />If this is the case, <em>please try again in {$lockout_time} minutes</em>.</pre>";
|
||||
|
||||
// Update bad login count
|
||||
$data = $db->prepare( 'UPDATE users SET failed_login = (failed_login + 1) WHERE user = (:user) LIMIT 1;' );
|
||||
$data->bindParam( ':user', $user, PDO::PARAM_STR );
|
||||
$data->execute();
|
||||
}
|
||||
|
||||
// Set the last login time
|
||||
$data = $db->prepare( 'UPDATE users SET last_login = now() WHERE user = (:user) LIMIT 1;' );
|
||||
$data->bindParam( ':user', $user, PDO::PARAM_STR );
|
||||
$data->execute();
|
||||
}
|
||||
|
||||
// Generate Anti-CSRF token
|
||||
generateSessionToken();
|
||||
|
||||
?>
|
||||
31
dvwa/vulnerabilities/brute/source/low.php
Normal file
31
dvwa/vulnerabilities/brute/source/low.php
Normal file
|
|
@ -0,0 +1,31 @@
|
|||
<?php
|
||||
|
||||
if( isset( $_GET[ 'Login' ] ) ) {
|
||||
// Get username
|
||||
$user = $_GET[ 'username' ];
|
||||
|
||||
// Get password
|
||||
$pass = $_GET[ 'password' ];
|
||||
$pass = md5( $pass );
|
||||
|
||||
// Check the database
|
||||
$query = "SELECT * FROM `users` WHERE user = '$user' AND password = '$pass';";
|
||||
$result = mysql_query( $query ) or die( '<pre>' . mysql_error() . '</pre>' );
|
||||
|
||||
if( $result && mysql_num_rows( $result ) == 1 ) {
|
||||
// Get users details
|
||||
$avatar = mysql_result( $result, 0, "avatar" );
|
||||
|
||||
// Login successful
|
||||
$html .= "<p>Welcome to the password protected area {$user}</p>";
|
||||
$html .= "<img src=\"{$avatar}\" />";
|
||||
}
|
||||
else {
|
||||
// Login failed
|
||||
$html .= "<pre><br />Username and/or password incorrect.</pre>";
|
||||
}
|
||||
|
||||
mysql_close();
|
||||
}
|
||||
|
||||
?>
|
||||
34
dvwa/vulnerabilities/brute/source/medium.php
Normal file
34
dvwa/vulnerabilities/brute/source/medium.php
Normal file
|
|
@ -0,0 +1,34 @@
|
|||
<?php
|
||||
|
||||
if( isset( $_GET[ 'Login' ] ) ) {
|
||||
// Sanitise username input
|
||||
$user = $_GET[ 'username' ];
|
||||
$user = mysql_real_escape_string( $user );
|
||||
|
||||
// Sanitise password input
|
||||
$pass = $_GET[ 'password' ];
|
||||
$pass = mysql_real_escape_string( $pass );
|
||||
$pass = md5( $pass );
|
||||
|
||||
// Check the database
|
||||
$query = "SELECT * FROM `users` WHERE user = '$user' AND password = '$pass';";
|
||||
$result = mysql_query( $query ) or die( '<pre>' . mysql_error() . '</pre>' );
|
||||
|
||||
if( $result && mysql_num_rows( $result ) == 1 ) {
|
||||
// Get users details
|
||||
$avatar = mysql_result( $result, 0, "avatar" );
|
||||
|
||||
// Login successful
|
||||
$html .= "<p>Welcome to the password protected area {$user}</p>";
|
||||
$html .= "<img src=\"{$avatar}\" />";
|
||||
}
|
||||
else {
|
||||
// Login failed
|
||||
sleep( 2 );
|
||||
$html .= "<pre><br />Username and/or password incorrect.</pre>";
|
||||
}
|
||||
|
||||
mysql_close();
|
||||
}
|
||||
|
||||
?>
|
||||
Loading…
Add table
Add a link
Reference in a new issue