7a4af30b38
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)
29 lines
1.2 KiB
Plaintext
29 lines
1.2 KiB
Plaintext
# HwBinder IPC from client to server
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binder_call(hal_wifi_hostapd_client, hal_wifi_hostapd_server)
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binder_call(hal_wifi_hostapd_server, hal_wifi_hostapd_client)
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add_hwservice(hal_wifi_hostapd_server, hal_wifi_hostapd_hwservice)
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allow hal_wifi_hostapd_client hal_wifi_hostapd_hwservice:hwservice_manager find;
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allow hal_wifi_hostapd_server self:global_capability_class_set { net_admin net_raw };
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allow hal_wifi_hostapd_server sysfs_net:dir search;
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# Allow hal_wifi_hostapd to access /proc/net/psched
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allow hal_wifi_hostapd_server proc_net_type:file { getattr open read };
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# Various socket permissions.
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allowxperm hal_wifi_hostapd_server self:udp_socket ioctl priv_sock_ioctls;
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allow hal_wifi_hostapd_server self:netlink_socket create_socket_perms_no_ioctl;
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allow hal_wifi_hostapd_server self:netlink_generic_socket create_socket_perms_no_ioctl;
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allow hal_wifi_hostapd_server self:packet_socket create_socket_perms_no_ioctl;
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allow hal_wifi_hostapd_server self:netlink_route_socket nlmsg_write;
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###
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### neverallow rules
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###
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# hal_wifi_hostapd should not trust any data from sdcards
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neverallow hal_wifi_hostapd_server sdcard_type:dir ~getattr;
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neverallow hal_wifi_hostapd_server sdcard_type:file *;
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