Kernel commit da69a5306ab92e07224da54aafee8b1dccf024f6
("selinux: support distinctions among all network address families")
modified the kernel to support fine grain differentiation of socket
families, if userspace enables it (which Android does).
Modify the ppp SELinux policy to allow the use of pppox_socket
(needed for kernels 4.14 or greater) and the generic "socket" family
(for kernels below 4.14).
Addresses the following denials:
04-19 20:25:34.059 16848 16848 I pppd : type=1400 audit(0.0:8703): avc: denied { read write } for dsm=HS_Q path="socket:[171178]" dev="sockfs" ino=171178 scontext=u:r:ppp:s0 tcontext=u:r:mtp:s0 tclass=pppox_socket permissive=1
04-19 20:25:34.075 16848 16848 I pppd : type=1400 audit(0.0:8704): avc: denied { ioctl } for dsm=HS_Q path="socket:[171179]" dev="sockfs" ino=171179 ioctlcmd=0x7437 scontext=u:r:ppp:s0 tcontext=u:r:mtp:s0 tclass=pppox_socket permissive=1
Bug: 130852066
Test: compiles
Change-Id: I00cc07108acaac5f2519ad0093d9db9572e325dc
system_file_type is a new attribute used to identify files which exist
on the /system partition. It's useful for allow rules in init, which are
based off of a blacklist of writable files. Additionally, it's useful
for constructing neverallow rules to prevent regressions.
Additionally, add commented out tests which enforce that all files on
the /system partition have the system_file_type attribute. These tests
will be uncommented in a future change after all the device-specific
policies are cleaned up.
Test: Device boots and no obvious problems.
Change-Id: Id9bae6625f042594c8eba74ca712abb09702c1e5
Files in /proc/net leak information. This change is the first step in
determining which files apps may use, whitelisting benign access, and
otherwise removing access while providing safe alternative APIs.
To that end, this change:
* Introduces the proc_net_type attribute which will assigned to any
new SELinux types in /proc/net to avoid removing access to privileged
processes. These processes may be evaluated later, but are lower
priority than apps.
* Labels /proc/net/{tcp,tcp6,udp,udp6} as proc_net_vpn due to existing
use by VPN apps. This may be replaced by an alternative API.
* Audits all other proc/net access for apps.
* Audits proc/net access for other processes which are currently
granted broad read access to /proc/net but should not be including
storaged, zygote, clatd, logd, preopt2cachename and vold.
Bug: 9496886
Bug: 68016944
Test: Boot Taimen-userdebug. On both wifi and cellular: stream youtube
navigate maps, send text message, make voice call, make video call.
Verify no avc "granted" messages in the logs.
Test: A few VPN apps including "VPN Monster", "Turbo VPN", and
"Freighter". Verify no logspam with the current setup.
Test: atest CtsNativeNetTestCases
Test: atest netd_integration_test
Test: atest QtaguidPermissionTest
Test: atest FileSystemPermissionTest
Change-Id: I7e49f796a25cf68bc698c6c9206e24af3ae11457
Merged-In: I7e49f796a25cf68bc698c6c9206e24af3ae11457
(cherry picked from commit 087318957f)
In kernel 4.7, the capability and capability2 classes were split apart
from cap_userns and cap2_userns (see kernel commit
8e4ff6f228e4722cac74db716e308d1da33d744f). Since then, Android cannot be
run in a container with SELinux in enforcing mode.
This change applies the existing capability rules to user namespaces as
well as the root namespace so that Android running in a container
behaves the same on pre- and post-4.7 kernels.
This is essentially:
1. New global_capability_class_set and global_capability2_class_set
that match capability+cap_userns and capability2+cap2_userns,
respectively.
2. s/self:capability/self:global_capability_class_set/g
3. s/self:capability2/self:global_capability2_class_set/g
4. Add cap_userns and cap2_userns to the existing capability_class_set
so that it covers all capabilities. This set was used by several
neverallow and dontaudit rules, and I confirmed that the new
classes are still appropriate.
Test: diff new policy against old and confirm that all new rules add
only cap_userns or cap2_userns;
Boot ARC++ on a device with the 4.12 kernel.
Bug: crbug.com/754831
Change-Id: I4007eb3a2ecd01b062c4c78d9afee71c530df95f
This attribute is being actively removed from policy. Since
attributes are not being versioned, partners must not be able to
access and use this attribute. Move it from private and verify in
the logs that rild and tee are not using these permissions.
Bug: 38316109
Test: build and boot Marlin
Test: Verify that rild and tee are not being granted any of these
permissions.
Change-Id: I31beeb5bdf3885195310b086c1af3432dc6a349b
Relabeling /vendor and /system/vendor to vendor_file removed
previously granted permissions. Restore these for non-treble devices.
Addresses:
avc: denied { execute_no_trans } for pid=2944 comm="dumpstate"
path="/system/vendor/bin/wpa_cli" dev="mmcblk0p10" ino=1929
scontext=u:r:dumpstate:s0 tcontext=u:object_r:vendor_file:s0
tclass=file
And potentially some other bugs that have yet to surface.
Bug: 37105075
Test: build Fugu
Change-Id: I8e7bd9c33819bf8206f7c110cbce72366afbcef8
The fix for b/35100237 surfaced this error. This SELinux policy
fragment was included only on Marlin, but needs to be included in core
policy.
Bug: 35100237
Test: With https://android-review.googlesource.com/#/c/354292/
Test: Set up PPTP VPN using http://www.vpnbook.com/ on Marlin.
Test: Connect:
03-17 15:41:22.602 3809 3809 I mtpd : Starting pppd (pppox = 9)
03-17 15:41:22.628 3811 3811 I pppd : Using PPPoX (socket = 9)
03-17 15:41:22.637 3811 3811 I pppd : pppd 2.4.7 started by vpn, uid 1016
03-17 15:41:22.639 3811 3811 I pppd : Using interface ppp0
03-17 15:41:22.639 3811 3811 I pppd : Connect: ppp0 <-->
03-17 15:41:22.770 3811 3811 I pppd : CHAP authentication succeeded
03-17 15:41:22.909 3811 3811 I pppd : MPPE 128-bit stateless compression enabled
03-17 15:41:23.065 3811 3811 I pppd : local IP address 172.16.36.113
03-17 15:41:23.065 3811 3811 I pppd : remote IP address 172.16.36.1
03-17 15:41:23.065 3811 3811 I pppd : primary DNS address 8.8.8.8
03-17 15:41:23.065 3811 3811 I pppd : secondary DNS address 91.239.100.100
Change-Id: I192b4dfc9613d1000f804b9c4ca2727d502a1927
Remove /proc/net access to domain_deprecated. Add it to domains where it
was missing before.
Other than these domains, SELinux denial monitoring hasn't picked up any
denials related to /proc/net
Bug: 28760354
Test: Device boots
Test: No unexpected denials in denial collection logs.
Change-Id: Ie5bfa4bc0070793c1e8bf3b00676fd31c08d426a
Divide policy into public and private components. This is the first
step in splitting the policy creation for platform and non-platform
policies. The policy in the public directory will be exported for use
in non-platform policy creation. Backwards compatibility with it will
be achieved by converting the exported policy into attribute-based
policy when included as part of the non-platform policy and a mapping
file will be maintained to be included with the platform policy that
maps exported attributes of previous versions to the current platform
version.
Eventually we would like to create a clear interface between the
platform and non-platform device components so that the exported policy,
and the need for attributes is minimal. For now, almost all types and
avrules are left in public.
Test: Tested by building policy and running on device.
Change-Id: Idef796c9ec169259787c3f9d8f423edf4ce27f8c
