[
https://issues.apache.org/jira/browse/CB-11320?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
jakub-g updated CB-11320:
-------------------------
Description:
It is written in Cordova security guide that generally one should avoid
iframes, unless they are fully in control of their contents:
https://cordova.apache.org/docs/en/latest/guide/appdev/security/#iframes-and-the-callback-id-mechanism
However not everyone might be familiar with this.
In general the iframe seems to follow the Single Origin Policy and does not
allow doing actions in the context of the top frame (main cordova app frame),
but I found the following issue:
1. Create a sample cordova project, and embed a third-party iframe in it:
[code]
cordova create foobar
cd foobar
cordova platform add android
vim www/index.html
# insert the following in the `index.html`
# <meta http-equiv="Content-Security-Policy" content="default-src 'self'
data: http://www.example.com";>
# <iframe src="http://www.example.com/evil-iframe.html";></iframe>
[code]
2. Put one of the commands like below is that external iframe in a `<script>`
tag
parent.location.href = 'about:blank'
top.location.href = 'about:blank'
parent.location = 'about:blank'
top.location = 'about:blank'
parent.location.assign('about:blank')
top.location.assign('about:blank')
3. `cordova run android`
4. Wait for the app to load and observe the app is minimized (killed).
Tested on two devices:
Android 6.0.1 / Chrome 50 / Samsung
Android 4.4 / Chrome 33 / Sony
was:
It is written in Cordova security guide that generally one should avoid
iframes, unless they are fully in control of their contents:
https://cordova.apache.org/docs/en/latest/guide/appdev/security/#iframes-and-the-callback-id-mechanism
However not everyone might be familiar with this.
In general the iframe seems to follow the Single Origin Policy and does not
allow doing actions in the context of the top frame (main cordova app frame),
but I found the following issue:
1. Create a sample cordova project, and embed a third-party iframe in it:
cordova create foobar
cd foobar
cordova platform add android
vim www/index.html
# insert the following in the `index.html`
# <meta http-equiv="Content-Security-Policy" content="default-src 'self'
data: http://www.example.com";>
# <iframe src="http://www.example.com/evil-iframe.html";></iframe>
2. Put one of the commands like below is that external iframe in a `<script>`
tag
parent.location.href = 'about:blank'
top.location.href = 'about:blank'
parent.location = 'about:blank'
top.location = 'about:blank'
parent.location.assign('about:blank')
top.location.assign('about:blank')
3. `cordova run android`
4. Wait for the app to load and observe the app is minimized (killed).
Tested on two devices:
Android 6.0.1 / Chrome 50 / Samsung
Android 4.4 / Chrome 33 / Sony
> Security: a malicious cross origin iframe can kill the app
> ----------------------------------------------------------
>
> Key: CB-11320
> URL: https://issues.apache.org/jira/browse/CB-11320
> Project: Apache Cordova
> Issue Type: Bug
> Environment: Windows 7, cordova 6.1.1, cordova-android 5.1.1
> Reporter: jakub-g
>
> It is written in Cordova security guide that generally one should avoid
> iframes, unless they are fully in control of their contents:
> https://cordova.apache.org/docs/en/latest/guide/appdev/security/#iframes-and-the-callback-id-mechanism
> However not everyone might be familiar with this.
> In general the iframe seems to follow the Single Origin Policy and does not
> allow doing actions in the context of the top frame (main cordova app frame),
> but I found the following issue:
> 1. Create a sample cordova project, and embed a third-party iframe in it:
> [code]
> cordova create foobar
> cd foobar
> cordova platform add android
> vim www/index.html
> # insert the following in the `index.html`
> # <meta http-equiv="Content-Security-Policy" content="default-src 'self'
> data: http://www.example.com";>
> # <iframe src="http://www.example.com/evil-iframe.html";></iframe>
> [code]
> 2. Put one of the commands like below is that external iframe in a `<script>`
> tag
> parent.location.href = 'about:blank'
> top.location.href = 'about:blank'
> parent.location = 'about:blank'
> top.location = 'about:blank'
> parent.location.assign('about:blank')
> top.location.assign('about:blank')
> 3. `cordova run android`
> 4. Wait for the app to load and observe the app is minimized (killed).
> Tested on two devices:
> Android 6.0.1 / Chrome 50 / Samsung
> Android 4.4 / Chrome 33 / Sony
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