Re: can_network patch.

[Daniel J Walsh <dwalsh@redhat.com>]

James Carter wrote:

>Merged with some changes.
>
>After talking with Steve, I removed can_network_server_udp and
>can_network_client_udp, and just used can_network_udp.  There is no
>security gained for udp in not allowing the connect if they already can
>send and receive.
>  
>
Ok,  this might be a candidate for a boolean

>Also removed, for now, the mozilla_macros.te chunk that allowed mozilla
>to execute userhelper and the rules giving mozilla more execute
>permissions.  
>
>I missed the userhelper stuff yesterday.  Letting mozilla run userhelper
>has some serious security implications.
>
>Isn't it possible to give the JRE the execute permisisons without giving
>it to $1_mozilla_t?
>
>  
>
Yes, although it will probably need alot of the same privs as mozilla, 
and be quite complicated.

>On Wed, 2004-11-24 at 11:22, Daniel J Walsh wrote:
>  
>
>>    *   This patch includes the ugliness to get sun's jre plugin to work
>>      in Mozilla.  (otherwize mozilla crashes).
>>    * Removed distro_gentoo checks around proc_net since we want these also.
>>    * Futzed around with userhelper so that mozilla can run it.
>>    * Cleaned up stunnel.te so it should be usable for gentoo and other
>>      distributions.
>>    * Some cleanup of apache to allow starting of apache with ssl keys
>>    * Includes modification to global_macros to extract out
>>      network_macros.te
>>
>>
>>network_macros.te includes
>>
>>can_network - with all the current functionaility
>>
>>I added
>>
>>can_network_server (Has listen and accept, both udp and tcp)
>>can_network_server_udp
>>can_network_server_tcp
>>
>>can_network_client (Has connect, both udp and tcp)
>>can_network_client_tcp
>>can_network_client_udp
>>
>>can_network_udp  - Same as can_network but only for udp
>>can_network_tcp - Same as can_network but only for tcp
>>
>>
>>______________________________________________________________________
>>    
>>
><snip>
>  
>
>>diff --exclude-from=exclude -N -u -r nsapolicy/macros/network_macros.te policy-1.19.5/macros/network_macros.te
>>--- nsapolicy/macros/network_macros.te	1969-12-31 19:00:00.000000000 -0500
>>+++ policy-1.19.5/macros/network_macros.te	2004-11-24 10:57:51.328334858 -0500
>>@@ -0,0 +1,189 @@
>>+#################################
>>+#
>>+# can_network(domain)
>>+#
>>+# Permissions for accessing the network.
>>+# See types/network.te for the network types.
>>+# See net_contexts for security contexts for network entities.
>>+#
>>+define(`base_can_network',`
>>+#
>>+# Allow the domain to create and use $2 sockets.
>>+# Other kinds of sockets must be separately authorized for use.
>>+allow $1 self:$2_socket connected_socket_perms;
>>+
>>+#
>>+# Allow the domain to send or receive using any network interface.
>>+# netif_type is a type attribute for all network interface types.
>>+#
>>+allow $1 netif_type:netif { $2_send rawip_send };
>>+allow $1 netif_type:netif { $2_recv rawip_recv };
>>+
>>+#
>>+# Allow the domain to send to or receive from any node.
>>+# node_type is a type attribute for all node types.
>>+#
>>+allow $1 node_type:node { $2_send rawip_send };
>>+allow $1 node_type:node { $2_recv rawip_recv };
>>+
>>+#
>>+# Allow the domain to send to or receive from any port.
>>+# port_type is a type attribute for all port types.
>>+#
>>+ifelse($3, `', `
>>+allow $1 port_type:$2_socket { send_msg recv_msg };
>>+', `
>>+allow $1 $3:$2_socket { send_msg recv_msg };
>>+')
>>+
>>+# XXX Allow binding to any node type.  Remove once
>>+# individual rules have been added to all domains that 
>>+# bind sockets. 
>>+allow $1 node_type:$2_socket node_bind;
>>+#
>>+# Allow access to network files including /etc/resolv.conf
>>+#
>>+allow $1 net_conf_t:file r_file_perms;
>>+')dnl end can_network definition
>>+
>>+#################################
>>+#
>>+# can_network_server_tcp(domain)
>>+#
>>+# Permissions for accessing a tcp network.
>>+# See types/network.te for the network types.
>>+# See net_contexts for security contexts for network entities.
>>+#
>>+define(`can_network_server_tcp',`
>>+base_can_network($1, tcp, `$2')
>>+allow $1 self:tcp_socket { listen accept };
>>+')
>>+
>>+#################################
>>+#
>>+# can_network_server_udp(domain)
>>+#
>>+# Permissions for accessing a udp network.
>>+# See types/network.te for the network types.
>>+# See net_contexts for security contexts for network entities.
>>+#
>>+define(`can_network_server_udp',`
>>+base_can_network($1, udp, `$2')
>>+')
>>+
>>+#################################
>>+#
>>+# can_network_client_tcp(domain)
>>+#
>>+# Permissions for accessing a tcp network.
>>+# See types/network.te for the network types.
>>+# See net_contexts for security contexts for network entities.
>>+#
>>+define(`can_network_client_tcp',`
>>+base_can_network($1, tcp, `$2')
>>+allow $1 self:tcp_socket { connect };
>>+')
>>+
>>+#################################
>>+#
>>+# can_network_client_udp(domain)
>>+#
>>+# Permissions for accessing a udp network.
>>+# See types/network.te for the network types.
>>+# See net_contexts for security contexts for network entities.
>>+#
>>+define(`can_network_client_udp',`
>>+base_can_network($1, udp, `$2')
>>+allow $1 self:udp_socket { connect };
>>+')
>>+
>>+#################################
>>+#
>>+# can_network_tcp(domain)
>>+#
>>+# Permissions for accessing the network.
>>+# See types/network.te for the network types.
>>+# See net_contexts for security contexts for network entities.
>>+#
>>+define(`can_network_tcp',`
>>+
>>+can_network_server_tcp($1, `$2')
>>+can_network_client_tcp($1, `$2')
>>+
>>+')
>>+
>>+#################################
>>+#
>>+# can_network_udp(domain)
>>+#
>>+# Permissions for accessing the network.
>>+# See types/network.te for the network types.
>>+# See net_contexts for security contexts for network entities.
>>+#
>>+define(`can_network_udp',`
>>+
>>+can_network_client_udp($1, `$2')
>>+can_network_server_udp($1, `$2')
>>+
>>+')
>>+
>>+#################################
>>+#
>>+# can_network_server(domain)
>>+#
>>+# Permissions for accessing the network.
>>+# See types/network.te for the network types.
>>+# See net_contexts for security contexts for network entities.
>>+#
>>+define(`can_network_server',`
>>+
>>+can_network_server_tcp($1, `$2')
>>+can_network_server_udp($1, `$2')
>>+
>>+')dnl end can_network_server definition
>>+
>>+
>>+#################################
>>+#
>>+# can_network_client(domain)
>>+#
>>+# Permissions for accessing the network.
>>+# See types/network.te for the network types.
>>+# See net_contexts for security contexts for network entities.
>>+#
>>+define(`can_network_client',`
>>+
>>+can_network_client_tcp($1, `$2')
>>+can_network_client_udp($1, `$2')
>>+
>>+')dnl end can_network_client definition
>>+
>>+#################################
>>+#
>>+# can_network(domain)
>>+#
>>+# Permissions for accessing the network.
>>+# See types/network.te for the network types.
>>+# See net_contexts for security contexts for network entities.
>>+#
>>+define(`can_network',`
>>+
>>+can_network_tcp($1, `$2')
>>+can_network_udp($1, `$2')
>>+
>>+#
>>+# Allow the domain to send NFS client requests via the socket
>>+# created by mount.
>>+#
>>+allow $1 mount_t:udp_socket rw_socket_perms;
>>+
>>+')dnl end can_network definition
>>+
>>+define(`can_resolve',`
>>+can_network_client_udp($1, `dns_port_t')
>>+')
>>+
>>+define(`can_ldap',`
>>+can_network_client_tcp($1, `ldap_port_t')
>>+')
>>+
>>    
>>
>
><snip>
>
>  
>
>>diff --exclude-from=exclude -N -u -r nsapolicy/macros/program/mozilla_macros.te policy-1.19.5/macros/program/mozilla_macros.te
>>--- nsapolicy/macros/program/mozilla_macros.te	2004-11-24 07:00:51.000000000 -0500
>>+++ policy-1.19.5/macros/program/mozilla_macros.te	2004-11-24 10:57:51.332334406 -0500
>>@@ -29,7 +29,8 @@
>> 
>> allow $1_mozilla_t usr_t:{ lnk_file file } { getattr read };
>> allow $1_mozilla_t var_lib_t:file { getattr read };
>>-allow $1_mozilla_t urandom_device_t:chr_file { getattr ioctl read };
>>+allow $1_mozilla_t { random_device_t urandom_device_t }:chr_file { getattr ioctl read append };
>>+
>> allow $1_mozilla_t self:socket create_socket_perms;
>> allow $1_mozilla_t self:file { getattr read };
>> 
>>@@ -117,8 +118,20 @@
>> dontaudit $1_mozilla_t file_type:dir getattr;
>> allow $1_mozilla_t self:sem create_sem_perms;
>> 
>>+ifdef(`userhelper.te', `
>>+domain_auto_trans($1_mozilla_t, userhelper_exec_t, $1_userhelper_t)
>>+')
>> dontaudit $1_mozilla_t selinux_config_t:dir search;
>> 
>>+#
>>+# Rules needed to run java apps
>>+#
>>+allow $1_mozilla_t ld_so_cache_t:file execute;
>>+allow $1_mozilla_t locale_t:file execute;
>>+dontaudit $1_mozilla_t *:{ chr_file file } execute;
>>+dontaudit $1_t ld_so_cache_t:file execute;
>>+dontaudit $1_t locale_t:file execute;
>>+
>> ifdef(`xdm.te', `
>> allow $1_mozilla_t xdm_t:fifo_file { write read };
>> allow $1_mozilla_t xdm_tmp_t:dir search;
>>    
>>
>
>  
>


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