Challenges
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Introduction
InsecureShop Challenges
Hardcoded Credentials
Insufficient URL Validation
Weak Host Validation
Arbitrary Code Execution
Intent Redirection (Access to Protected Components)
Unprotected Data URIs
Theft of Arbitrary files from LocalStorage
Using Components with Known Vulnerabilities
Insecure Broadcast Receiver
AWS Cognito Misconfiguration
Insecure use of FilePaths in FileProvider
Use of Implicit intent to send a broadcast with sensitive data
Intercepting Implicit intent to load arbitrary URL
Insecure Implementation of SetResult in exported Activity
Insecure Content Provider
Lack of SSL Certificate Validation
Insecure Webview Properties Enabled
Insecure Data Storage
Insecure Logging
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Unprotected Data URIs
The com.insecureshop.WebView2Activity contains the following code. The code takes untrusted URL in loadUrl method and passes it to webview.
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if (!(dataString == null || kotlin.text.StringsKt.isBlank(dataString))) {
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android.content.Intent intent2 = getIntent();
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kotlin.jvm.internal.Intrinsics.checkExpressionValueIsNotNull(intent2, "intent");
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webview.loadUrl(intent2.getDataString());
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return;
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}
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Going an extra mile

Analyze the intent-filter used by this activity carefully. Can you convert this attack into a remote exploitation by utilizing intent scheme URIs?

Reference:

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Intent Redirection (Access to Protected Components)
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Theft of Arbitrary files from LocalStorage
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Going an extra mile
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