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)
16 lines
585 B
Text
16 lines
585 B
Text
# preopt2cachename executable
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#
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# This executable translates names from the preopted versions the build system
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# creates to the names the runtime expects in the data directory.
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type preopt2cachename, domain;
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type preopt2cachename_exec, exec_type, file_type;
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# Allow write to stdout.
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allow preopt2cachename cppreopts:fd use;
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allow preopt2cachename cppreopts:fifo_file { getattr read write };
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# Allow write to logcat.
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allow preopt2cachename proc_net_type:file r_file_perms;
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userdebug_or_eng(`
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auditallow preopt2cachename proc_net_type:{ dir file lnk_file } { getattr open read };
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')
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