The Tecno Camon Android device with a build fingerprint of TECNO/H622/TECNO-ID5b:8.1.0/O11019/G-180829V31:user/release-keys contains a pre-installed platform app with a package name of com.lovelyfont.defcontainer (versionCode=7, versionName=7.0.11). This app contains an exported service named com.lovelyfont.manager.service.FunctionService that allows any app co-located on the device to supply the file path to a Dalvik Executable (DEX) file which it will dynamically load within its own process and execute in with its own system privileges. This app cannot be disabled by the user and the attack can be performed by a zero-permission app. Executing commands as the system user can allow a third-party app to video record the users screen, factory reset the device, obtain the users notifications, read the logcat logs, inject events in the Graphical User Interface (GUI), and obtains the users text messages, and more. Executing code as the system user can allow a third-party app to factory reset the device, obtain the users Wi-Fi passwords, obtain the users notifications, read the logcat logs, inject events in the GUI, change the default Input Method Editor (IME) (e.g., keyboard) with one contained within the attacking app that contains keylogging functionality, and obtains the users text messages, and more.
The product exposes a resource to the wrong control sphere, providing unintended actors with inappropriate access to the resource.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Tecno/h622/tecno-id5b:8.1.0/o11019/g-180829v31:user/release-keys_firmware | Tecno-mobile | - | - |
Resources such as files and directories may be inadvertently exposed through mechanisms such as insecure permissions, or when a program accidentally operates on the wrong object. For example, a program may intend that private files can only be provided to a specific user. This effectively defines a control sphere that is intended to prevent attackers from accessing these private files. If the file permissions are insecure, then parties other than the user will be able to access those files. A separate control sphere might effectively require that the user can only access the private files, but not any other files on the system. If the program does not ensure that the user is only requesting private files, then the user might be able to access other files on the system. In either case, the end result is that a resource has been exposed to the wrong party.