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authorAndrey Andreev <narf@devilix.net>2018-03-15 15:43:35 +0100
committerAndrey Andreev <narf@devilix.net>2018-03-15 15:46:11 +0100
commite475b1c9ed1b82b5f4a6a2c31267171f75a82406 (patch)
tree1ffdc3362583818418e45968500c56c527ae3722 /system/core
parent6efd42ebafceda967d1d8def06ee412d3c1f382b (diff)
Merge pull request #5431 from CyberSecutor/develop
Added parenthesis check around "document" elements and fixed non-existent document.window filter to window.document
Diffstat (limited to 'system/core')
-rw-r--r--system/core/Security.php10
1 files changed, 6 insertions, 4 deletions
diff --git a/system/core/Security.php b/system/core/Security.php
index 89a94c3dd..31926b466 100644
--- a/system/core/Security.php
+++ b/system/core/Security.php
@@ -134,7 +134,9 @@ class CI_Security {
*/
protected $_never_allowed_str = array(
'document.cookie' => '[removed]',
+ '(document).cookie' => '[removed]',
'document.write' => '[removed]',
+ '(document).write' => '[removed]',
'.parentNode' => '[removed]',
'.innerHTML' => '[removed]',
'-moz-binding' => '[removed]',
@@ -152,7 +154,7 @@ class CI_Security {
*/
protected $_never_allowed_regex = array(
'javascript\s*:',
- '(document|(document\.)?window)\.(location|on\w*)',
+ '(\(?document\)?|\(?window\)?(\.document)?)\.(location|on\w*)',
'expression\s*(\(|&\#40;)', // CSS and IE
'vbscript\s*:', // IE, surprise!
'wscript\s*:', // IE
@@ -861,7 +863,7 @@ class CI_Security {
// For other tags, see if their attributes are "evil" and strip those
elseif (isset($matches['attributes']))
{
- // We'll store the already fitlered attributes here
+ // We'll store the already filtered attributes here
$attributes = array();
// Attribute-catching pattern
@@ -935,7 +937,7 @@ class CI_Security {
return str_replace(
$match[1],
preg_replace(
- '#href=.*?(?:(?:alert|prompt|confirm)(?:\(|&\#40;|`|&\#96;)|javascript:|livescript:|mocha:|charset=|window\.|document\.|\.cookie|<script|<xss|d\s*a\s*t\s*a\s*:)#si',
+ '#href=.*?(?:(?:alert|prompt|confirm)(?:\(|&\#40;|`|&\#96;)|javascript:|livescript:|mocha:|charset=|window\.|\(?document\)?\.|\.cookie|<script|<xss|d\s*a\s*t\s*a\s*:)#si',
'',
$this->_filter_attributes($match[1])
),
@@ -963,7 +965,7 @@ class CI_Security {
return str_replace(
$match[1],
preg_replace(
- '#src=.*?(?:(?:alert|prompt|confirm|eval)(?:\(|&\#40;|`|&\#96;)|javascript:|livescript:|mocha:|charset=|window\.|document\.|\.cookie|<script|<xss|base64\s*,)#si',
+ '#src=.*?(?:(?:alert|prompt|confirm|eval)(?:\(|&\#40;|`|&\#96;)|javascript:|livescript:|mocha:|charset=|window\.|\(?document\)?\.|\.cookie|<script|<xss|base64\s*,)#si',
'',
$this->_filter_attributes($match[1])
),