SensitiveKeyboardCache.qhelp

<!DOCTYPE qhelp PUBLIC
  "-//Semmle//qhelp//EN"
  "qhelp.dtd">
<qhelp>

<overview>
<p>When a user enters information in a text input field on an Android application, their input is saved to a keyboard cache which provides autocomplete suggestions and predictions. There is a risk that sensitive user data, such as passwords or banking information, may be leaked to other applications via the keyboard cache.</p>

</overview>
<recommendation>

<p>For input fields expected to accept sensitive information, use input types such as <code>"textNoSuggestions"</code> (or <code>"textPassword"</code> for a password) to ensure the input does not get stored in the keyboard cache.</p>
<p>Optionally, instead of declaring an input type through XML, you can set the input type in your code using <code>TextView.setInputType()</code>.</p>
</recommendation>
<example>

<p>In the following example, the field labeled BAD allows the password to be saved to the keyboard cache,
 whereas the field labeled GOOD uses the <code>"textPassword"</code> input type to ensure the password is not cached.</p>

<sample src="Example.xml" />

</example>
<references>

<li>
  OWASP Mobile Application Security Testing Guide: <a href="https://github.com/OWASP/owasp-mastg/blob/b7a93a2e5e0557cc9a12e55fc3f6675f6986bb86/Document/0x05d-Testing-Data-Storage.md#determining-whether-the-keyboard-cache-is-disabled-for-text-input-fields-mstg-storage-5">Determining Whether the Keyboard Cache Is Disabled for Text Input Fields</a>.
</li>
<li>
  Android Developers: <a href="https://developer.android.com/reference/android/widget/TextView#attr_android:inputType">android:inputType attribute documentation.</a>
</li>

</references>
</qhelp>