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-rwxr-xr-xsystem/core/Security.php131
1 files changed, 70 insertions, 61 deletions
diff --git a/system/core/Security.php b/system/core/Security.php
index ac39ce97b..4593a1090 100755
--- a/system/core/Security.php
+++ b/system/core/Security.php
@@ -41,14 +41,14 @@ class CI_Security {
*
* @var string
*/
- protected $_xss_hash = '';
+ protected $_xss_hash = '';
/**
* Random Hash for Cross Site Request Forgery Protection Cookie
*
* @var string
*/
- protected $_csrf_hash = '';
+ protected $_csrf_hash = '';
/**
* Expiration time for Cross Site Request Forgery Protection Cookie
@@ -56,39 +56,39 @@ class CI_Security {
*
* @var int
*/
- protected $_csrf_expire = 7200;
+ protected $_csrf_expire = 7200;
/**
* Token name for Cross Site Request Forgery Protection Cookie
*
* @var string
*/
- protected $_csrf_token_name = 'ci_csrf_token';
+ protected $_csrf_token_name = 'ci_csrf_token';
/**
* Cookie name for Cross Site Request Forgery Protection Cookie
*
* @var string
*/
- protected $_csrf_cookie_name = 'ci_csrf_token';
+ protected $_csrf_cookie_name = 'ci_csrf_token';
/**
* List of never allowed strings
*
* @var array
*/
- protected $_never_allowed_str = array(
- 'document.cookie' => '[removed]',
- 'document.write' => '[removed]',
- '.parentNode' => '[removed]',
- '.innerHTML' => '[removed]',
- 'window.location' => '[removed]',
- '-moz-binding' => '[removed]',
- '<!--' => '&lt;!--',
- '-->' => '--&gt;',
- '<![CDATA[' => '&lt;![CDATA[',
- '<comment>' => '&lt;comment&gt;'
- );
+ protected $_never_allowed_str = array(
+ 'document.cookie' => '[removed]',
+ 'document.write' => '[removed]',
+ '.parentNode' => '[removed]',
+ '.innerHTML' => '[removed]',
+ 'window.location' => '[removed]',
+ '-moz-binding' => '[removed]',
+ '<!--' => '&lt;!--',
+ '-->' => '--&gt;',
+ '<![CDATA[' => '&lt;![CDATA[',
+ '<comment>' => '&lt;comment&gt;'
+ );
/**
* List of never allowed regex replacement
@@ -96,12 +96,18 @@ class CI_Security {
* @var array
*/
protected $_never_allowed_regex = array(
- 'javascript\s*:',
- 'expression\s*(\(|&\#40;)', // CSS and IE
- 'vbscript\s*:', // IE, surprise!
- 'Redirect\s+302'
- );
+ 'javascript\s*:',
+ 'expression\s*(\(|&\#40;)', // CSS and IE
+ 'vbscript\s*:', // IE, surprise!
+ 'Redirect\s+302',
+ "([\"'])?data\s*:[^\\1]*?base64[^\\1]*?,[^\\1]*?\\1?"
+ );
+ /**
+ * Initialize security class
+ *
+ * @return void
+ */
public function __construct()
{
// Is CSRF protection enabled?
@@ -156,7 +162,7 @@ class CI_Security {
// Do the tokens exist in both the _POST and _COOKIE arrays?
if ( ! isset($_POST[$this->_csrf_token_name]) OR ! isset($_COOKIE[$this->_csrf_cookie_name])
- OR $_POST[$this->_csrf_token_name] != $_COOKIE[$this->_csrf_cookie_name]) // Do the tokens match?
+ OR $_POST[$this->_csrf_token_name] !== $_COOKIE[$this->_csrf_cookie_name]) // Do the tokens match?
{
$this->csrf_show_error();
}
@@ -185,6 +191,7 @@ class CI_Security {
* Set Cross Site Request Forgery Protection Cookie
*
* @return object
+ * @codeCoverageIgnore
*/
public function csrf_set_cookie()
{
@@ -197,11 +204,11 @@ class CI_Security {
}
setcookie(
- $this->_csrf_cookie_name,
- $this->_csrf_hash,
- $expire,
- config_item('cookie_path'),
- config_item('cookie_domain'),
+ $this->_csrf_cookie_name,
+ $this->_csrf_hash,
+ $expire,
+ config_item('cookie_path'),
+ config_item('cookie_domain'),
$secure_cookie,
config_item('cookie_httponly')
);
@@ -362,9 +369,10 @@ class CI_Security {
* These words are compacted back to their correct state.
*/
$words = array(
- 'javascript', 'expression', 'vbscript', 'script',
- 'applet', 'alert', 'document', 'write', 'cookie', 'window'
- );
+ 'javascript', 'expression', 'vbscript', 'script', 'base64',
+ 'applet', 'alert', 'document', 'write', 'cookie', 'window'
+ );
+
foreach ($words as $word)
{
@@ -400,7 +408,7 @@ class CI_Security {
$str = preg_replace('#<(/*)(script|xss)(.*?)\>#si', '[removed]', $str);
}
}
- while($original != $str);
+ while($original !== $str);
unset($original);
@@ -467,7 +475,7 @@ class CI_Security {
*/
public function xss_hash()
{
- if ($this->_xss_hash == '')
+ if ($this->_xss_hash === '')
{
mt_srand();
$this->_xss_hash = md5(time() + mt_rand(0, 1999999999));
@@ -522,23 +530,23 @@ class CI_Security {
public function sanitize_filename($str, $relative_path = FALSE)
{
$bad = array(
- '../', '<!--', '-->', '<', '>',
- "'", '"', '&', '$', '#',
- '{', '}', '[', ']', '=',
- ';', '?', '%20', '%22',
- '%3c', // <
- '%253c', // <
- '%3e', // >
- '%0e', // >
- '%28', // (
- '%29', // )
- '%2528', // (
- '%26', // &
- '%24', // $
- '%3f', // ?
- '%3b', // ;
- '%3d' // =
- );
+ '../', '<!--', '-->', '<', '>',
+ "'", '"', '&', '$', '#',
+ '{', '}', '[', ']', '=',
+ ';', '?', '%20', '%22',
+ '%3c', // <
+ '%253c', // <
+ '%3e', // >
+ '%0e', // >
+ '%28', // (
+ '%29', // )
+ '%2528', // (
+ '%26', // &
+ '%24', // $
+ '%3f', // ?
+ '%3b', // ;
+ '%3d' // =
+ );
if ( ! $relative_path)
{
@@ -558,8 +566,8 @@ class CI_Security {
* Callback function for xss_clean() to remove whitespace from
* things like j a v a s c r i p t
*
- * @param type
- * @return type
+ * @param array
+ * @return string
*/
protected function _compact_exploded_words($matches)
{
@@ -568,8 +576,8 @@ class CI_Security {
// --------------------------------------------------------------------
- /*
- * Remove Evil HTML Attributes (like evenhandlers and style)
+ /**
+ * Remove Evil HTML Attributes (like event handlers and style)
*
* It removes the evil attribute and either:
* - Everything up until a space
@@ -602,10 +610,11 @@ class CI_Security {
$attribs = array();
// find occurrences of illegal attribute strings without quotes
- preg_match_all('/('.implode('|', $evil_attributes).')\s*=\s*([^\s]*)/is', $str, $matches, PREG_SET_ORDER);
+ preg_match_all('/('.implode('|', $evil_attributes).')\s*=\s*([^\s>]*)/is', $str, $matches, PREG_SET_ORDER);
foreach ($matches as $attr)
{
+
$attribs[] = preg_quote($attr[0], '/');
}
@@ -620,7 +629,7 @@ class CI_Security {
// replace illegal attribute strings that are inside an html tag
if (count($attribs) > 0)
{
- $str = preg_replace('/<(\/?[^><]+?)([^A-Za-z\-])('.implode('|', $attribs).')([\s><])([><]*)/i', '<$1$2$4$5', $str, -1, $count);
+ $str = preg_replace('/<(\/?[^><]+?)([^A-Za-z<>\-])(.*?)('.implode('|', $attribs).')(.*?)([\s><])([><]*)/i', '<$1 $3$5$6$7', $str, -1, $count);
}
} while ($count);
@@ -661,7 +670,7 @@ class CI_Security {
protected function _js_link_removal($match)
{
return str_replace($match[1],
- preg_replace('#href=.*?(alert\(|alert&\#40;|javascript\:|livescript\:|mocha\:|charset\=|window\.|document\.|\.cookie|<script|<xss|base64\s*,)#si',
+ preg_replace('#href=.*?(alert\(|alert&\#40;|javascript\:|livescript\:|mocha\:|charset\=|window\.|document\.|\.cookie|<script|<xss|data\s*:)#si',
'',
$this->_filter_attributes(str_replace(array('<', '>'), '', $match[1]))
),
@@ -801,7 +810,7 @@ class CI_Security {
foreach ($this->_never_allowed_regex as $regex)
{
- $str = preg_replace('#'.$regex.'#i', '[removed]', $str);
+ $str = preg_replace('#'.$regex.'#is', '[removed]', $str);
}
return $str;
@@ -816,14 +825,14 @@ class CI_Security {
*/
protected function _csrf_set_hash()
{
- if ($this->_csrf_hash == '')
+ if ($this->_csrf_hash === '')
{
// If the cookie exists we will use it's value.
// We don't necessarily want to regenerate it with
// each page load since a page could contain embedded
// sub-pages causing this feature to fail
if (isset($_COOKIE[$this->_csrf_cookie_name]) &&
- $_COOKIE[$this->_csrf_cookie_name] != '')
+ preg_match('#^[0-9a-f]{32}$#iS', $_COOKIE[$this->_csrf_cookie_name]) === 1)
{
return $this->_csrf_hash = $_COOKIE[$this->_csrf_cookie_name];
}
@@ -838,4 +847,4 @@ class CI_Security {
}
/* End of file Security.php */
-/* Location: ./system/core/Security.php */
+/* Location: ./system/core/Security.php */ \ No newline at end of file
generated by cgit v1.2.3-24-g4f1b (git 2.32.0) at 2024-11-01 22:13:28 +0100