Previous versions are very likely to be vulnerable as well. Here is the current status (as of June 19th, 2017). Stealthy phishing (for which the user finds herself logged in, as she would expect).Silent installation of God-mode app (with all permissions enabled).Stealing two-factor authentication tokens (SMS-based, Google Authenticator, and other app-based tokens).Device unlock through PIN injection + perform arbitrary actions while keeping the screen off!.According to the documentation, this should not be possible (See "security note" here) Unconstrained keystroke recording, including passwords.Invisible Grid Attack, allowing unconstrained keystroke recording, including password, private messages, etc.Īttacks that abuse “accessibility service” permission:.(Note: others have identified ways to use clickjacking to get a11y. Context-aware clickjacking & Context hiding: two techniques that make luring the user to enable the accessibility service practical, even when the latest security mechanisms (e.g., "obscured flag") are correctly implemented and enabled.
DEFENSE ZONE 2 HACK ANDROID ANDROID
To date, all these attacks are still practical (see "Which versions of Android are affected" and "Responsible Disclosure" below).Īttacks that abuse the “draw on top” permission:.In fact, one may say that some of these functionality work "as intended" Nonetheless, this work shows that this functionality can be abused. Most of these attacks are due to design issues, and they are thus challenging to prevent.These attacks are practical: we performed a user study (with 20 human subjects), and no user understood what happened.The possible attacks include advanced clickjacking, unconstrained keystroke recording, stealthy phishing, the silent installation of a God-mode app (with all permissions enabled), and silent phone unlocking + arbitrary actions (while keeping the screen off).In fact, in this scenario, "draw on top" is automatically granted, and this permission is enough to lure the user into unknowingly enable a11y (through clickjacking). If the malicious app is installed from the Play Store, the user is not notified about the permissions and she does not need to explicitly grant them for the attacks to succeed.These attacks abuse one or both of the SYSTEM_ALERT_WINDOW ("draw on top") and BIND_ACCESSIBILITY_SERVICE ("a11y").
DEFENSE ZONE 2 HACK ANDROID SERIES
We uncover a series of vulnerabilities and design shortcomings affecting the Android UI.These attacks affect all recent versions of Android (including the latest version, Android 7.1.2), and they are yet to be fixed. Our user study indicates that these attacks are practical. These attacks only require two permissions that, in case the app is installed from the Play Store, the user does not need to explicitly grant and for which she is not even notified. These attacks allow a malicious app to completely control the UI feedback loop and take over the device - without giving the user a chance to notice the malicious activity.
Cloak & Dagger is a new class of potential attacks affecting Android devices.
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