In computeFocusedWindow of RootWindowContainer.java, and related functions, there is possible interception of keypresses due to focus being on the wrong window. This could lead to local escalation of privilege revealing the users keypresses while the screen was locked with no additional execution privileges needed. User interaction is needed for exploitation. Product: Android Versions: Android-8.0 Android-8.1 Android ID: A-71786287.
Weakness
The web application does not restrict or incorrectly restricts frame objects or UI layers that belong to another application or domain, which can lead to user confusion about which interface the user is interacting with.
Affected Software
| Name |
Vendor |
Start Version |
End Version |
| Android |
Google |
8.0 (including) |
8.0 (including) |
| Android |
Google |
8.1 (including) |
8.1 (including) |
Potential Mitigations
- The use of X-Frame-Options allows developers of web content to restrict the usage of their application within the form of overlays, frames, or iFrames. The developer can indicate from which domains can frame the content.
- The concept of X-Frame-Options is well documented, but implementation of this protection mechanism is in development to cover gaps. There is a need for allowing frames from multiple domains.
- A developer can use a “frame-breaker” script in each page that should not be framed. This is very helpful for legacy browsers that do not support X-Frame-Options security feature previously mentioned.
- It is also important to note that this tactic has been circumvented or bypassed. Improper usage of frames can persist in the web application through nested frames. The “frame-breaking” script does not intuitively account for multiple nested frames that can be presented to the user.
References