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#DOWNLOAD BUSYBOX FOR ANDROID INSTALL#
#DOWNLOAD BUSYBOX FOR ANDROID PATCH#

#DOWNLOAD BUSYBOX FOR ANDROID INSTALL#

Unfortunatelly, we weren’t that lucky and andrax install became a nightmare. If by any chance you don’t experience any of these “unsuspecting” issues, the installation process is relatively straightforward. Android Security Internals) you can use to get additional info. There are a lot of online sources out there or books (e.g. We’re not going to go into SELinux details for now, we’re going to leave it for some other time.

Android 8.x : updated SELinux to work with Treble, separating lower-level vendor code from Android System Framework.

Check Protecting Android with more Linux Kernel defenses and Hardening the media stack

Android 7.x : lock down of app sandbox (reducing attack surface), broking monolithic mediaserver stack into smaller processes.

=Android 6.x : further hardened, reduced permissiveness to include better isolation between users, IOCTL filtering, reduced threat of expose services, further tightening of SELinux domains and /proc access.

Any generic denial (block_device, socket_device, default_service) indicates that devies needs a special domain.

No processes other than init should run in the init domain.

=Android 5.x : SELinux is fully enforced.

Enforced : Actions contrary to policy are blocked and logged.

SELinux provides extra layer of security for resources in the system, providing MAC (Mandatory Access Control) / DAC (Discretionary Access Control).

It was rarely mentioned to put SELinux to permissive mode on formal documentation and public threads.Īndrax Welcome Screen & Tools SELinux Info We forgot about that, it didn’t occur to us Android Security might be the issue, especially having in mind custom ROM, rooted phone via Magisk, etc. SockFS – pseudo filesystem that manage the pipe/socket syscalls. Apparently “Andrax” (an untrusted app) was denied access to ioctrl permission on system_server (unix_stream_socket). We saw one line that told us what the issue potentially was/is: $ adb -s ENU5T15B12000686 shell -t logcatĬhnology.andrax: type=1400 audit(0.0:86): avc: denied for path="socket:" dev="sockfs" ino=17610 ioctlcmd=5414 scontext=u:r:untrusted_app:s0:c512,c768 tcontext=u:r:system_server:s0 tclass=unix_stream_socket permissive=0

As a very last idea, we looked into logcat information and we got “lucky”. We made a wrong conclusions because of it, took the wrong path. The busybox binary has been built statically against glibc - unfortunately, it seems impossible to build it against Android NDK.

#DOWNLOAD BUSYBOX FOR ANDROID PATCH#

A system user who was the owner of ANDRAX directory couldn’t access it in “Andrax Recovery Mode”, but could do so via Termux. The files busybox-android.patch and nfig are a patch that allows ash history to work on Android and the configuration used to build Busybox, respectively.