mirror of
https://github.com/EGroupware/egroupware.git
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205 lines
6.5 KiB
PHP
205 lines
6.5 KiB
PHP
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<?php
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/**
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* Tests for XSS
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*
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* @link http://www.egroupware.org
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* @author Nathan Gray
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* @package api
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* @copyright (c) 2017 Nathan Gray
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* @license http://opensource.org/licenses/gpl-license.php GPL - GNU General Public License
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*/
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namespace EGroupware\Api;
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require_once realpath(__DIR__.'/../common.php'); // autoloader & check_load_extension
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//
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// We're testing security.php
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require_once realpath(__DIR__.'/../security.php');
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use EGroupware\Api;
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use PHPUnit_Framework_TestCase as TestCase;
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class SecurityTest extends TestCase {
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public function tearDown()
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{
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unset($GLOBALS['egw_inset_vars']);
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}
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/**
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* Test some strings for bad stuff
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*
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* @param String $pattern String to check
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* @param boolean $should_fail If we expect this string to fail
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*
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* @dataProvider patternProvider
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*/
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public function testPatterns($pattern, $should_fail)
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{
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$test = array($pattern);
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unset($GLOBALS['egw_unset_vars']);
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_check_script_tag($test,'test', false);
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$this->assertEquals(isset($GLOBALS['egw_unset_vars']), $should_fail);
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}
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public function patternProvider()
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{
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return array(
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// pattern, true: should fail, false: should not fail
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Array('< script >alert(1)< / script >', true),
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Array('<span onMouseOver ="alert(1)">blah</span>', true),
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Array('<a href= "JaVascript: alert(1)">Click Me</a>', true),
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// from https://www.acunetix.com/websitesecurity/cross-site-scripting/
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Array('<body onload=alert("XSS")>', true),
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Array('<body background="javascript:alert("XSS")">', true),
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Array('<iframe src=”http://evil.com/xss.html”>', true),
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Array('<input type="image" src="javascript:alert(\'XSS\');">', true),
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Array('<link rel="stylesheet" href="javascript:alert(\'XSS\');">', true),
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Array('<table background="javascript:alert(\'XSS\')">', true),
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Array('<td background="javascript:alert(\'XSS\')">', true),
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Array('<div style="background-image: url(javascript:alert(\'XSS\'))">', true),
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Array('<div style="width: expression(alert(\'XSS\'));">', true),
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Array('<object type="text/x-scriptlet" data="http://hacker.com/xss.html">', true),
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// false positiv tests
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Array('If 1 < 2, what does that mean for description, if 2 > 1.', false),
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Array('If 1 < 2, what does that mean for a script, if 2 > 1.', false),
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Array('<div>Script and Javascript: not evil ;-)', false),
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Array('<span>style=background-color', false),
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Array('<font face="Script MT Bold" size="4"><span style="font-size:16pt;">Hugo Sonstwas</span></font>', false),
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Array('<mathias@stylite.de>', false)
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);
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}
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/**
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* Test some URLs with bad stuff
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*
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* @param String $url
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* @param Array $vectors
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*
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* @dataProvider urlProvider
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*/
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public function testURLs($url, $vectors = FALSE)
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{
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// no all xss attack vectors from http://ha.ckers.org/xssAttacks.xml are relevant here! (needs interpretation)
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if (!$vectors)
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{
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$this->markAsSkipped("Could not download or parse $url with attack vectors");
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return;
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}
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foreach($vectors as $line => $pattern)
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{
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$test = array($pattern);
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_check_script_tag($test, 'line '.(1+$line), false);
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$this->assertTrue(isset($GLOBALS['egw_unset_vars']), $line . ': ' . $pattern);
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}
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}
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public function urlProvider()
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{
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$urls = array(
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// we currently fail 76 of 666 test, thought they seem not to apply to our use case, as we check request data
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'https://gist.github.com/JohannesHoppe/5612274' => file(
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'https://gist.githubusercontent.com/JohannesHoppe/5612274/raw/60016bccbfe894dcd61a6be658a4469e403527de/666_lines_of_XSS_vectors.html'),
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// we currently fail 44 of 140 tests, thought they seem not to apply to our use case, as we check request data
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'https://html5sec.org/' => call_user_func(function() {
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$payloads = $items = null;
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if (!($items_js = file_get_contents('https://html5sec.org/items.js')) ||
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!preg_match_all("|^\s+'data'\s+:\s+'(.*)',$|m", $items_js, $items, PREG_PATTERN_ORDER) ||
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!($payload_js = file_get_contents('https://html5sec.org/payloads.js')) ||
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!preg_match_all("|^\s+'([^']+)'\s+:\s+'(.*)',$|m", $payload_js, $payloads, PREG_PATTERN_ORDER))
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{
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return false;
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}
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$replace = array(
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"\\'" => "'",
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'\\\\'=> '\\,',
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'\r' => "\r",
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'\n' => "\n",
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);
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foreach($payloads[1] as $n => $from) {
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$replace['%'.$from.'%'] = $payloads[2][$n];
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}
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return array_map(function($item) use ($replace) {
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return strtr($item, $replace);
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}, $items[1]);
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}),
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);
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$test_data = array();
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foreach($urls as $url => $vectors)
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{
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$test_data[] = array(
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$url, $vectors
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);
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}
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return $test_data;
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}
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/**
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* Test safe unserialization
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*
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* @param String $str Serialized string to be checked
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* @param boolean $result If we expect the string to fail or not
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*
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* @dataProvider unserializeProvider
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*/
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public function testUnserialize($str, $result)
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{
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$r=@php_safe_unserialize($str);
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if((bool)($r) !== $result)
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{
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if (!$result)
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{
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if (PHP_VERSION >= 7)
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{
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if (preg_match_all('/([^ ]+) Object\(/', array2string($r), $matches))
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{
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foreach($matches[1] as $class)
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{
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if (!preg_match('/^__PHP_Incomplete_Class(#\d+)?$/', $class))
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{
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$this->fail($str);
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}
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}
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}
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}
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else
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{
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$this->fail($str);
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}
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}
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else
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{
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$this->fail("false positive: $str");
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}
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}
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}
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/**
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* Data set for unserialize test
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*/
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public function unserializeProvider()
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{
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return array(
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// Serialized string, expected result
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// things unsafe to unserialize
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Array("O:34:\"Horde_Kolab_Server_Decorator_Clean\":2:{s:43:\"\x00Horde_Kolab_Server_Decorator_Clean\x00_server\";", false),
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Array("O:20:\"Horde_Prefs_Identity\":2:{s:9:\"\x00*\x00_prefs\";O:11:\"Horde_Prefs\":2:{s:8:\"\x00*\x00_opts\";a:1:{s:12:\"sizecallback\";", false),
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Array("a:2:{i:0;O:12:\"Horde_Config\":1:{s:13:\"\x00*\x00_oldConfig\";s:#{php_injection.length}:\"#{php_injection}\";}i:1;s:13:\"readXMLConfig\";}}", false),
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Array('a:6:{i:0;i:0;i:1;d:2;i:2;s:4:"ABCD";i:3;r:3;i:4;O:8:"my_Class":2:{s:1:"a";r:6;s:1:"b";N;};i:5;C:16:"SplObjectStorage":14:{x:i:0;m:a:0:{}}', false),
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Array(serialize(new \stdClass()), false),
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Array(serialize(array(new \stdClass(), new \SplObjectStorage())), false),
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// string content, safe to unserialize
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Array(serialize('O:8:"stdClass"'), true),
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Array(serialize('C:16:"SplObjectStorage"'), true),
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Array(serialize(array('a', 'O:8:"stdClass"', 'b', 'C:16:"SplObjectStorage"')), true),
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// false positive: failing our php<7 regular expression, because it has correct delimiter (^|;|{) in front of pattern :-(
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Array(serialize('O:8:"stdClass";C:16:"SplObjectStorage"'), true),
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);
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}
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}
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