diff options
| author | Aleksander Machniak <alec@alec.pl> | 2013-08-04 12:41:30 +0200 |
|---|---|---|
| committer | Aleksander Machniak <alec@alec.pl> | 2013-08-04 12:41:30 +0200 |
| commit | ce5a6496fd6039962ba7424d153278e41ae8761b (patch) | |
| tree | 50174a0153cfa90125960ccbef32da5e6c2a238f /program | |
| parent | b825f86108a91957f6467176e418cfc257874658 (diff) | |
Fix XSS vulnerability when saving HTML signatures (#1489251)
Diffstat (limited to 'program')
| -rw-r--r-- | program/steps/settings/edit_identity.inc | 3 | ||||
| -rw-r--r-- | program/steps/settings/save_identity.inc | 46 |
2 files changed, 48 insertions, 1 deletions
diff --git a/program/steps/settings/edit_identity.inc b/program/steps/settings/edit_identity.inc index d70a7aef7..edd4ba60d 100644 --- a/program/steps/settings/edit_identity.inc +++ b/program/steps/settings/edit_identity.inc @@ -77,7 +77,7 @@ function rcube_identity_form($attrib) 'signature' => array( 'name' => rcube_label('signature'), 'content' => array( - 'signature' => array('type' => 'textarea', 'size' => $t_cols, 'rows' => $t_rows, + 'signature' => array('type' => 'textarea', 'size' => $t_cols, 'rows' => $t_rows, 'spellcheck' => true), 'html_signature' => array('type' => 'checkbox', 'label' => rcube_label('htmlsignature'), 'onclick' => 'return rcmail_toggle_editor(this, \'rcmfd_signature\');'), @@ -138,6 +138,7 @@ function rcube_identity_form($attrib) $label = !empty($colprop['label']) ? $colprop['label'] : rcube_label(str_replace('-', '', $col)); + $value = !empty($colprop['value']) ? $colprop['value'] : rcmail_get_edit_field($col, $IDENTITY_RECORD[$col], $colprop, $colprop['type']); diff --git a/program/steps/settings/save_identity.inc b/program/steps/settings/save_identity.inc index 34d8be268..d3b132f8b 100644 --- a/program/steps/settings/save_identity.inc +++ b/program/steps/settings/save_identity.inc @@ -76,6 +76,15 @@ foreach ($email_checks as $email) { } } +// XSS protection in HTML signature (#1489251) +if (!empty($save_data['signature']) && !empty($save_data['html_signature'])) { + $save_data['signature'] = rcmail_wash_html($save_data['signature']); + + // clear POST data of signature, we want to use safe content + // when the form is displayed again + unset($_POST['_signature']); +} + // update an existing contact if ($_POST['_iid']) { $iid = get_input_value('_iid', RCUBE_INPUT_POST); @@ -167,3 +176,40 @@ if (!empty($_REQUEST['_framed'])) { } else rcmail_overwrite_action('identities'); + + +/** + * Sanity checks/cleanups on HTML body of signature + */ +function rcmail_wash_html($html) +{ + // Add header with charset spec., washtml cannot work without that + $html = '<html><head>' + . '<meta http-equiv="Content-Type" content="text/html; charset='.RCMAIL_CHARSET.'" />' + . '</head><body>' . $html . '</body></html>'; + + // clean HTML with washhtml by Frederic Motte + $wash_opts = array( + 'show_washed' => false, + 'allow_remote' => 1, + 'charset' => RCMAIL_CHARSET, + 'html_elements' => array('body', 'link'), + 'html_attribs' => array('rel', 'type'), + ); + + // initialize HTML washer + $washer = new rcube_washtml($wash_opts); + + //$washer->add_callback('form', 'rcmail_washtml_callback'); + //$washer->add_callback('style', 'rcmail_washtml_callback'); + + // Remove non-UTF8 characters (#1487813) + $html = rc_utf8_clean($html); + + $html = $washer->wash($html); + + // remove unwanted comments and tags (produced by washtml) + $html = preg_replace(array('/<!--[^>]+-->/', '/<\/?body>/'), '', $html); + + return $html; +} |