module
Android Binder Use-After-Free Exploit
| Disclosed | Created |
|---|---|
| 09/26/2019 | 02/23/2020 |
Disclosed
09/26/2019
Created
02/23/2020
Description
This module exploits CVE-2019-2215, which is a use-after-free in Binder in the
Android kernel. The bug is a local privilege escalation vulnerability that
allows for a full compromise of a vulnerable device. If chained with a browser
renderer exploit, this bug could fully compromise a device through a malicious
website.
The freed memory is replaced with an iovec structure in order to leak a pointer
to the task_struct. Finally the bug is triggered again in order to overwrite
the addr_limit, making all memory (including kernel memory) accessible as part
of the user-space memory range in our process and allowing arbitrary reading
and writing of kernel memory.
Android kernel. The bug is a local privilege escalation vulnerability that
allows for a full compromise of a vulnerable device. If chained with a browser
renderer exploit, this bug could fully compromise a device through a malicious
website.
The freed memory is replaced with an iovec structure in order to leak a pointer
to the task_struct. Finally the bug is triggered again in order to overwrite
the addr_limit, making all memory (including kernel memory) accessible as part
of the user-space memory range in our process and allowing arbitrary reading
and writing of kernel memory.
Authors
Jann HornMaddie Stonegrant-htimwr
Platform
Android,Linux
Architectures
aarch64
References
Module Options
To display the available options, load the module within the Metasploit console and run the commands ‘show options’ or ‘show advanced’:
msf > use exploit/android/local/binder_uaf
msf /(f) > show actions
...actions...
msf /(f) > set ACTION < action-name >
msf /(f) > show options
...show and set options...
msf /(f) > run
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