full-disclosure - Re: "Data-Clone" -- a new way to attack android apps

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Date: Mon, 18 Mar 2013 11:19:29 +0800
From: IEhrepus <5up3rh3i@...il.com>
To: Jann Horn <jannhorn@...glemail.com>
Cc: "full-disclosure@...ts.grok.org.uk" <full-disclosure@...ts.grok.org.uk>
Subject: Re: "Data-Clone" -- a new way to attack android
	apps

http://www.80vul.com/android/data-clone.txt update

thx jonn Horn(jannhorn@...glemail.com)




hitest


2013/3/18 IEhrepus <5up3rh3i@...il.com>

> “I'm pretty sure that this is wrong. Apps on the SD card are encrypted. The
>
> crypto is flawed, but not so flawed that this kind of attack would
> be possible. Also, apps on the device even need an exploit just to be
> able to read the encrypted data.”
>
> yes,"apps install on SDcard" is wrong :( apps install on sdcard ,but the
> data  on /data/data/xxx , like "Already have super privileges"
>
> thank u :), i will change it .
>
> hitest
>
>
> 2013/3/18 Jann Horn <jannhorn@...glemail.com>
>
>> On Sun, Mar 17, 2013 at 06:09:09PM +0800, IEhrepus wrote:
>> > "Data-Clone" -- a new way to attack android apps
>> >
>> > Author: SuperHei@....knownsec.com [Email:5up3rh3i#gmail.com]
>> > Release Date: 2013/03/16
>> > References: http://www.80vul.com/android/data-clone.txt
>> > Chinese Version:
>> > http://blog.knownsec.com/2013/03/attack-your-android-apps-by-webview/
>> >
>> > --[ I - Introduction
>> >
>> > This is a new way to attack android apps t,and i call it "Data-Clone
>> > Attack". it can bypass password authentication ,when user login the
>> > app and set "remember password"(some apps is define).
>> [...]
>> > --[ III - How to exploit
>> >
>> > "How to get the contents of data" is key to the completion of the
>> > attack. some like this:
>> >
>> > 1. Already have super privileges
>> >
>> > under the root shell like the demo,u can bypass password
>> > authentication used "Data-Clone Attack".
>> >
>> > 2. apps install on SDcard
>> >
>> > the others have read  permissions to obtain the app's data.
>>
>> I'm pretty sure that this is wrong. Apps on the SD card are encrypted. The
>> crypto is flawed, but not so flawed that this kind of attack would
>> be possible. Also, apps on the device even need an exploit just to be
>> able to read the encrypted data.
>>
>>
>> > 3. Cross-site scripting on android
>> >
>> > app + webview + xss(or webkit xcs vul) = "Data-Clone"
>> >
>> > On older version of android , android app's xss or webkit xcs  vul can
>> > read the loacl file's contents :
>> > http://www.80vul.com/android/android-0days.txt
>> >
>> > So the app's webview have the file read permissions to the app's data.
>> > when a app user visit a URL link,the data will Be cloned。
>> >
>> > --[ IV - Disclosure Timeline
>> >
>> > 2012/03/   - Found this
>> > 2012/12/10 - Report it to security@...roid.com
>> >
>> > ......For a long time has passed......
>> >
>> > 2013/03/16 - security@...roid.com do not have any response
>> > (maybe,because Google was not andriod's biological mother)
>> > 2013/03/16 －Public Disclosure
>>
>> Or maybe because it's not exactly interesting that you can read an app's
>> data if you can execute code in its context?
>>
>
>

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