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authorbrian978 <dbrian89@yahoo.com>2012-12-03 20:18:20 +0100
committerWes Baker <wes@wesbaker.com>2013-07-05 21:56:50 +0200
commit4c866e0b911fcc82cf49b317178788ce3c319bd4 (patch)
tree88770f047772ebeee6f1d8c7c69902a9a8cdf9a5 /system/core/Security.php
parentcc86334957360b5c8f753ba03658d4033b867003 (diff)
Added small improvement to the _remove_evil_attributes function
Signed-off-by: brian978 <dbrian89@yahoo.com> Signed-off-by: Wes Baker <wes@wesbaker.com> Conflicts: system/core/Security.php
Diffstat (limited to 'system/core/Security.php')
-rwxr-xr-xsystem/core/Security.php13
1 files changed, 6 insertions, 7 deletions
diff --git a/system/core/Security.php b/system/core/Security.php
index 00089d765..b0d39b981 100755
--- a/system/core/Security.php
+++ b/system/core/Security.php
@@ -619,17 +619,16 @@ class CI_Security {
$count = 0;
$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);
+ // find occurrences of illegal attribute strings with quotes (042 and 047 are octal quotes)
+ preg_match_all('/('.implode('|', $evil_attributes).')\s*=\s*(\042|\047)([^\\2]*?)(\\2)/is', $str, $matches, PREG_SET_ORDER);
foreach ($matches as $attr)
{
-
$attribs[] = preg_quote($attr[0], '/');
}
- // find occurrences of illegal attribute strings with quotes (042 and 047 are octal quotes)
- preg_match_all("/(".implode('|', $evil_attributes).")\s*=\s*(\042|\047)([^\\2]*?)(\\2)/is", $str, $matches, PREG_SET_ORDER);
+ // find occurrences of illegal attribute strings without quotes
+ preg_match_all('/('.implode('|', $evil_attributes).')\s*=\s*([^\s>]*)/is', $str, $matches, PREG_SET_ORDER);
foreach ($matches as $attr)
{
@@ -639,7 +638,7 @@ class CI_Security {
// replace illegal attribute strings that are inside an html tag
if (count($attribs) > 0)
{
- $str = preg_replace("/<(\/?[^><]+?)([^A-Za-z<>\-])(.*?)(".implode('|', $attribs).")(.*?)([\s><])([><]*)/i", '<$1 $3$5$6$7', $str, -1, $count);
+ $str = preg_replace('/(<?)(\/?[^><]+?)([^A-Za-z<>\-])(.*?)('.implode('|', $attribs).')(.*?)([\s><]?)([><]*)/i', '$1$2 $4$6$7$8', $str, -1, $count);
}
} while ($count);
@@ -873,4 +872,4 @@ class CI_Security {
}
/* End of file Security.php */
-/* Location: ./system/libraries/Security.php */ \ No newline at end of file
+/* Location: ./system/libraries/Security.php */