We have been having a discussion on line about this.  I believe that we should combine the policy for mozilla_plugin_t chrome_sandbox_t into a signel web_plugin_t and then apply it to all webrowser plugins.


What do you guys think?


Michael  we would need to know where to apply the file context associated with WebKitWebProcess2.


To give you an idea of how this is done for chrome and firefox.

grep chrome /etc/selinux/targeted/contexts/files/file_contexts
/opt/google/chrome(/.*)?	system_u:object_r:bin_t:s0
/opt/google/chrome[^/]*/chrome-sandbox	--	system_u:object_r:chrome_sandbox_exec_t:s0
/opt/google/chrome[^/]*/nacl_helper_bootstrap	--	system_u:object_r:chrome_sandbox_nacl_exec_t:s0
/opt/google/chrome/.*\.so	--	system_u:object_r:textrel_shlib_t:s0
/usr/lib/chromium-browser/chrome-sandbox	--	system_u:object_r:chrome_sandbox_exec_t:s0
/opt/google/chrome/nacl_helper_bootstrap	--	system_u:object_r:chrome_sandbox_nacl_exec_t:s0
/usr/lib/chromium-browser/nacl_helper_bootstrap	--	system_u:object_r:chrome_sandbox_nacl_exec_t:s0

grep mozilla_plugin /etc/selinux/targeted/contexts/files/file_contexts
/usr/lib/xulrunner[^/]*/plugin-container	--	system_u:object_r:mozilla_plugin_exec_t:s0
/usr/lib/mozilla/plugins-wrapped(/.*)?	system_u:object_r:mozilla_plugin_rw_t:s0
/usr/lib/nspluginwrapper/npviewer.bin	--	system_u:object_r:mozilla_plugin_exec_t:s0
/usr/bin/nspluginscan	--	system_u:object_r:mozilla_plugin_exec_t:s0
/usr/bin/nspluginviewer	--	system_u:object_r:mozilla_plugin_exec_t:s0
/usr/libexec/WebKitPluginProcess	--	system_u:object_r:mozilla_plugin_exec_t:s0
/usr/lib/firefox/plugin-container	--	system_u:object_r:mozilla_plugin_exec_t:s0
/usr/lib/nspluginwrapper/plugin-config	--	system_u:object_r:mozilla_plugin_config_exec_t:s0

WebKitPluginProcess and WebKitPluginProcess2 handle plugins from the same locations. WebKit checks the plugin for GTK+ symbols before loading it; if there are any GTK+ 2 symbols it launches WebKitPluginProcess2 to handle the plugin, otherwise it uses WebKitPluginProcess (which is linked to GTK+ 3, and would hang if it were to try to open something that is linked to GTK+ 2). So the file context should probably be the same for both of them, correct?

A couple thoughts:

/usr/libexec/WebKitPluginProcess	--	system_u:object_r:mozilla_plugin_exec_t:s0

This is the old location; it no longer exists there, but was moved to /usr/libexec/webkit2gtk-4.0/WebKitPluginProcess. Therefore I guess what we want is:

/usr/libexec/webkit2gtk-4.0/WebKitPluginProcess	--	system_u:object_r:mozilla_plugin_exec_t:s0
/usr/libexec/webkit2gtk-4.0/WebKitPluginProcess2	--	system_u:object_r:mozilla_plugin_exec_t:s0

Also, nspluginwrapper was removed from rawhide, so you probably don't need this rule going forward:

/usr/lib/nspluginwrapper/plugin-config	--	system_u:object_r:mozilla_plugin_config_exec_t:s0

In case it matters, we load plugins from the following locations:

all directories in $MOZ_PLUGIN_PATH
$MOZILLA_HOME/plugins
$HOME/.mozilla/plugins
$HOME/.netscape/plugins
/usr/lib/browser/plugins
/usr/local/lib/mozilla/plugins
/usr/lib/firefox/plugins
/usr/lib64/browser-plugins
/usr/lib/browser-plugins
/usr/lib/mozilla/plugins
/usr/local/netscape/plugins
/opt/mozilla/plugins
/opt/mozilla/lib/plugins
/opt/netscape/plugins
/opt/netscape/communicator/plugins
/usr/lib/netscape/plugins
/usr/lib/netscape/plugins-libc5
/usr/lib/netscape/plugins-libc6
/usr/lib64/netscape/plugins
/usr/lib64/mozilla/plugins
/usr/lib/nsbrowser/plugins
/usr/lib64/nsbrowser/plugins

Similarly,

qt5-qtwebkit has
/usr/lib(64)/qt5/libexec/QtWebPluginProcess
/usr/lib(64)/qt5/libexec/QtWebProcess

and
qt5-qtwebengine has
/usr/lib(64)/qt5/libexec/QtWebEngineProcess

which could be constrained too (else, we can put that off for another day)

This bug appears to have been reported against 'rawhide' during the Fedora 24 development cycle.
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