Your app contains an Intent Redirection vulnerability - android-security

Question

I launched a game to the Google Play store recently and it was going good until now. I just received an email from Google that says that "One or more of your apps contains an Intent Redirection vulnerability that puts user data at risk " and tells me I need to fix it by August 13.
I personally don't collect or demand any user data or info. However, I used Google Admob ads with Facebook mediation and Unity ads in my game which may be the cause of this problem. So, my question is how to overcome this problem? They also said in the email to make changes in the manifest file. If any one has a similar problem and knows the solution for it, your help would be appreciated.
Here is the email:
"One or more of your apps contains an Intent Redirection vulnerability that puts user data at risk. On August 13, 2019, any apps that contain unfixed security vulnerabilities beyond the dates listed on your Play Console alerts will be removed from Google Play.
Action required
Sign in to your Play Console.
Select Alerts to see which apps contain a security vulnerability, and review the guidance on how to resolve the vulnerability.
Update your affected apps to fix the vulnerabilities.
Submit the updated versions of your affected apps.
Upon resubmission, your app will be reviewed again. This process can take several hours. If the app passes review and is published successfully then no further action is required. If the app fails review then the new app version will not be published and you will receive notification via email."

Answer 1

I was having the same issue "intent redirection your app(s) are vulnerable to intent redirection" and I added exported="false" in every activity, but still got rejected, then I realized the problem was in one of the payment libraries I was using, all I had to do is update the library and the new app update got live.
my issue was in RazorPay payment gateway, I updated it from 1.6.3 to 1.6.6 (latest)
implementation 'com.razorpay:checkout:1.6.6'
they already mentioned this issue here, check it out https://github.com/razorpay/razorpay-android-sample-app/issues/202

Answer 2

I have a same issue, actually Latest Unity Add Xiaomi SDK by default which cause this issue.
Simple remove Xiaomi from your Unity it will fix the issue.

Answer 3

We had received a similar email, In the Play Console/Alert tab, we found this
for us, the reason is "com.androidnative.features.social.common.SocialProxyActivity.StartActivity"
which come from Android Native asset[Ultimate Mobile] - Unity3D.
We used that asset for Advertisements, In-app purchase and play game services instead of using the original SDK. So the possible solution is to remove that asset from our game and use the original SDK.

Answer 4

Here is the Screenshot of my alert.

Answer 5

There are several points to keep in mind to resolve that issue:
The most confusing: you must rollout affected application fixed APK/AAB to 100% on all tracks where it had place to be. Important note is that among others you must rollout production track release to 100% in order to Google to reconstruct your issue.
In the new version of Play Console there is no way to find out any specific information about the issue so you should email Google Support to ask for details. As a respone you may possibly get obfuscated method or class signature, so you need to deobfuscate it.
Read carefully through official document to address issues and resolve them. Our application got rejected because SMS BroadcastReceiver did not apply any permission restraints.

Answer 6

Ihsan Ali
The problem is in the UnityChannel.aar file, you need to open it with the help of the archiver and open the AndroidManifest.XML. I in the line android:exported="true" wrote a false as indicated in the article in Google. Now publish the version and if the error will no longer be reported.

Answer 7

I had the same issue. Just remove xiaomi app game centre from your unity>>game build option. Disabling it will surely clear out the issue.