diff options
Diffstat (limited to 'contrib')
| -rw-r--r-- | contrib/fedora/passt.spec | 44 | ||||
| -rw-r--r-- | contrib/selinux/passt-repair.te | 39 | ||||
| -rw-r--r-- | contrib/selinux/passt.te | 29 | ||||
| -rw-r--r-- | contrib/selinux/pasta.fc | 10 | ||||
| -rw-r--r-- | contrib/selinux/pasta.te | 58 |
5 files changed, 150 insertions, 30 deletions
diff --git a/contrib/fedora/passt.spec b/contrib/fedora/passt.spec index 6a83f8b..663289f 100644 --- a/contrib/fedora/passt.spec +++ b/contrib/fedora/passt.spec @@ -9,6 +9,7 @@ %global git_hash {{{ git_head }}} %global selinuxtype targeted +%global selinux_policy_version 41.41 Name: passt Version: {{{ git_version }}} @@ -33,18 +34,22 @@ for network namespaces: traffic is forwarded using a tap interface inside the namespace, without the need to create further interfaces on the host, hence not requiring any capabilities or privileges. -%package selinux -BuildArch: noarch -Summary: SELinux support for passt and pasta -Requires: %{name} = %{version}-%{release} -Requires: selinux-policy -Requires(post): %{name} -Requires(post): policycoreutils -Requires(preun): %{name} -Requires(preun): policycoreutils +%package selinux +BuildArch: noarch +Summary: SELinux support for passt and pasta +Requires: selinux-policy-%{selinuxtype} +Requires: container-selinux +Requires(post): selinux-policy-%{selinuxtype} +Requires(post): container-selinux +Requires(post): policycoreutils +Requires(post): libselinux-utils +Requires(preun): policycoreutils +BuildRequires: selinux-policy-devel +BuildRequires: pkgconfig(systemd) +Recommends: selinux-policy-%{selinuxtype} >= %{selinux_policy_version} %description selinux -This package adds SELinux enforcement to passt(1) and pasta(1). +This package adds SELinux enforcement to passt(1), pasta(1), passt-repair(1). %prep %setup -q -n passt-%{git_hash} @@ -82,23 +87,33 @@ make -f %{_datadir}/selinux/devel/Makefile install -p -m 644 -D passt.pp %{buildroot}%{_datadir}/selinux/packages/%{selinuxtype}/passt.pp install -p -m 644 -D passt.if %{buildroot}%{_datadir}/selinux/devel/include/distributed/passt.if install -p -m 644 -D pasta.pp %{buildroot}%{_datadir}/selinux/packages/%{selinuxtype}/pasta.pp +install -p -m 644 -D passt-repair.pp %{buildroot}%{_datadir}/selinux/packages/%{selinuxtype}/passt-repair.pp popd %pre selinux %selinux_relabel_pre -s %{selinuxtype} %post selinux -%selinux_modules_install -s %{selinuxtype} %{_datadir}/selinux/packages/%{selinuxtype}/passt.pp -%selinux_modules_install -s %{selinuxtype} %{_datadir}/selinux/packages/%{selinuxtype}/pasta.pp +%selinux_modules_install -s %{selinuxtype} %{_datadir}/selinux/packages/%{selinuxtype}/passt.pp %{_datadir}/selinux/packages/%{selinuxtype}/pasta.pp %{_datadir}/selinux/packages/%{selinuxtype}/passt-repair.pp %postun selinux if [ $1 -eq 0 ]; then - %selinux_modules_uninstall -s %{selinuxtype} passt - %selinux_modules_uninstall -s %{selinuxtype} pasta + %selinux_modules_uninstall -s %{selinuxtype} passt pasta passt-repair fi %posttrans selinux %selinux_relabel_post -s %{selinuxtype} +# %selinux_relabel_post calls fixfiles(8) with the previous file_contexts file +# (see selabel_file(5)) in order to restore only the file contexts which +# actually changed. However, as file_contexts doesn't support %{USERID} +# substitutions, this will not work for specific file contexts that pasta needs +# to have under /run/user. +# +# Restore those explicitly, hiding errors from restorecon(8): we can't pass a +# path that's more specific than this, but at the same time /run/user often +# contains FUSE mountpoints that can't be accessed as root, leading to +# "Permission denied" messages, but not failures. +restorecon -R /run/user 2>/dev/null %files %license LICENSES/{GPL-2.0-or-later.txt,BSD-3-Clause.txt} @@ -124,6 +139,7 @@ fi %{_datadir}/selinux/packages/%{selinuxtype}/passt.pp %{_datadir}/selinux/devel/include/distributed/passt.if %{_datadir}/selinux/packages/%{selinuxtype}/pasta.pp +%{_datadir}/selinux/packages/%{selinuxtype}/passt-repair.pp %changelog {{{ passt_git_changelog }}} diff --git a/contrib/selinux/passt-repair.te b/contrib/selinux/passt-repair.te index e3ffbcd..7157dfb 100644 --- a/contrib/selinux/passt-repair.te +++ b/contrib/selinux/passt-repair.te @@ -28,12 +28,22 @@ require { type console_device_t; type user_devpts_t; type user_tmp_t; + + # Workaround: passt-repair needs to needs to access socket files + # that passt, started by libvirt, might create under different + # labels, depending on whether passt is started as root or not. + # + # However, libvirt doesn't maintain its own policy, which makes + # updates particularly complicated. To avoid breakage in the short + # term, deal with that in passt's own policy. + type qemu_var_run_t; + type virt_var_run_t; } type passt_repair_t; domain_type(passt_repair_t); type passt_repair_exec_t; -files_type(passt_repair_exec_t); +corecmd_executable_file(passt_repair_exec_t); role unconfined_r types passt_repair_t; @@ -41,7 +51,8 @@ allow passt_repair_t passt_repair_exec_t:file { read execute execute_no_trans en type_transition unconfined_t passt_repair_exec_t:process passt_repair_t; allow unconfined_t passt_repair_t:process transition; -allow passt_repair_t self:capability { dac_override net_admin net_raw }; +allow passt_repair_t self:capability { dac_override dac_read_search net_admin net_raw }; +allow passt_repair_t self:capability2 bpf; allow passt_repair_t console_device_t:chr_file { append open getattr read write ioctl }; allow passt_repair_t user_devpts_t:chr_file { append open getattr read write ioctl }; @@ -50,9 +61,27 @@ allow passt_repair_t unconfined_t:unix_stream_socket { connectto read write }; allow passt_repair_t passt_t:unix_stream_socket { connectto read write }; allow passt_repair_t user_tmp_t:unix_stream_socket { connectto read write }; -allow passt_repair_t unconfined_t:sock_file { read write }; -allow passt_repair_t passt_t:sock_file { read write }; -allow passt_repair_t user_tmp_t:sock_file { read write }; +allow passt_repair_t user_tmp_t:dir { getattr read search watch }; + +allow passt_repair_t unconfined_t:sock_file { getattr read write }; +allow passt_repair_t passt_t:sock_file { getattr read write }; +allow passt_repair_t user_tmp_t:sock_file { getattr read write }; allow passt_repair_t unconfined_t:tcp_socket { read setopt write }; allow passt_repair_t passt_t:tcp_socket { read setopt write }; + +# Workaround: passt-repair needs to needs to access socket files +# that passt, started by libvirt, might create under different +# labels, depending on whether passt is started as root or not. +# +# However, libvirt doesn't maintain its own policy, which makes +# updates particularly complicated. To avoid breakage in the short +# term, deal with that in passt's own policy. +allow passt_repair_t qemu_var_run_t:unix_stream_socket { connectto read write }; +allow passt_repair_t virt_var_run_t:unix_stream_socket { connectto read write }; + +allow passt_repair_t qemu_var_run_t:dir { getattr read search watch }; +allow passt_repair_t virt_var_run_t:dir { getattr read search watch }; + +allow passt_repair_t qemu_var_run_t:sock_file { getattr read write }; +allow passt_repair_t virt_var_run_t:sock_file { getattr read write }; diff --git a/contrib/selinux/passt.te b/contrib/selinux/passt.te index c6cea34..eb9ce72 100644 --- a/contrib/selinux/passt.te +++ b/contrib/selinux/passt.te @@ -20,9 +20,19 @@ require { type fs_t; type tmp_t; type user_tmp_t; + type user_home_t; type tmpfs_t; type root_t; + # Workaround: passt --vhost-user needs to map guest memory, but + # libvirt doesn't maintain its own policy, which makes updates + # particularly complicated. To avoid breakage in the short term, + # deal with it in passt's own policy. + type svirt_image_t; + type svirt_tmpfs_t; + type svirt_t; + type null_device_t; + class file { ioctl getattr setattr create read write unlink open relabelto execute execute_no_trans map }; class dir { search write add_name remove_name mounton }; class chr_file { append read write open getattr ioctl }; @@ -38,8 +48,8 @@ require { type net_conf_t; type proc_net_t; type node_t; - class tcp_socket { create accept listen name_bind name_connect }; - class udp_socket { create accept listen }; + class tcp_socket { create accept listen name_bind name_connect getattr ioctl }; + class udp_socket { create accept listen getattr }; class icmp_socket { bind create name_bind node_bind setopt read write }; class sock_file { create unlink write }; @@ -80,6 +90,9 @@ allow passt_t root_t:dir mounton; allow passt_t tmp_t:dir { add_name mounton remove_name write }; allow passt_t tmpfs_t:filesystem mount; allow passt_t fs_t:filesystem unmount; +allow passt_t user_home_t:dir search; +allow passt_t user_tmp_t:fifo_file append; +allow passt_t user_tmp_t:file map; manage_files_pattern(passt_t, user_tmp_t, user_tmp_t) files_pid_filetrans(passt_t, user_tmp_t, file) @@ -119,11 +132,19 @@ corenet_udp_sendrecv_all_ports(passt_t) allow passt_t node_t:icmp_socket { name_bind node_bind }; allow passt_t port_t:icmp_socket name_bind; -allow passt_t self:tcp_socket { create getopt setopt connect bind listen accept shutdown read write }; -allow passt_t self:udp_socket { create getopt setopt connect bind read write }; +allow passt_t self:tcp_socket { create getopt setopt connect bind listen accept shutdown read write getattr ioctl }; +allow passt_t self:udp_socket { create getopt setopt connect bind read write getattr }; allow passt_t self:icmp_socket { bind create setopt read write }; allow passt_t user_tmp_t:dir { add_name write }; allow passt_t user_tmp_t:file { create open }; allow passt_t user_tmp_t:sock_file { create read write unlink }; allow passt_t unconfined_t:unix_stream_socket { read write }; + +# Workaround: passt --vhost-user needs to map guest memory, but +# libvirt doesn't maintain its own policy, which makes updates +# particularly complicated. To avoid breakage in the short term, +# deal with it in passt's own policy. +allow passt_t svirt_image_t:file { read write map }; +allow passt_t svirt_tmpfs_t:file { read write map }; +allow passt_t null_device_t:chr_file map; diff --git a/contrib/selinux/pasta.fc b/contrib/selinux/pasta.fc index 41ee46d..e4aefc4 100644 --- a/contrib/selinux/pasta.fc +++ b/contrib/selinux/pasta.fc @@ -8,7 +8,9 @@ # Copyright (c) 2022 Red Hat GmbH # Author: Stefano Brivio <sbrivio@redhat.com> -/usr/bin/pasta system_u:object_r:pasta_exec_t:s0 -/usr/bin/pasta.avx2 system_u:object_r:pasta_exec_t:s0 -/tmp/pasta\.pcap system_u:object_r:pasta_log_t:s0 -/var/run/pasta\.pid system_u:object_r:pasta_pid_t:s0 +/usr/bin/pasta system_u:object_r:pasta_exec_t:s0 +/usr/bin/pasta.avx2 system_u:object_r:pasta_exec_t:s0 +/tmp/pasta\.pcap system_u:object_r:pasta_log_t:s0 +/var/run/pasta\.pid system_u:object_r:pasta_pid_t:s0 +/run/user/%{USERID}/netns system_u:object_r:ifconfig_var_run_t:s0 +/run/user/%{USERID}/containers/networks/rootless-netns system_u:object_r:ifconfig_var_run_t:s0 diff --git a/contrib/selinux/pasta.te b/contrib/selinux/pasta.te index d0ff0cc..9440d05 100644 --- a/contrib/selinux/pasta.te +++ b/contrib/selinux/pasta.te @@ -18,6 +18,7 @@ require { type bin_t; type user_home_t; type user_home_dir_t; + type user_tmp_t; type fs_t; type tmp_t; type tmpfs_t; @@ -56,8 +57,10 @@ require { attribute port_type; type port_t; type http_port_t; + type http_cache_port_t; type ssh_port_t; type reserved_port_t; + type unreserved_port_t; type dns_port_t; type dhcpc_port_t; type chronyd_port_t; @@ -86,6 +89,15 @@ require { class capability { sys_tty_config setuid setgid }; class cap_userns { setpcap sys_admin sys_ptrace net_bind_service net_admin }; class user_namespace create; + + # Container requires + attribute_role usernetctl_roles; + role container_user_r; + role staff_r; + role user_r; + type container_runtime_t; + type container_t; + type systemd_user_runtimedir_t; } type pasta_t; @@ -110,6 +122,9 @@ init_daemon_domain(pasta_t, pasta_exec_t) allow pasta_t self:capability { setpcap net_bind_service sys_tty_config dac_read_search net_admin sys_resource setuid setgid }; allow pasta_t self:cap_userns { setpcap sys_admin sys_ptrace net_admin net_bind_service }; +# pasta only calls setuid and setgid with the current UID and GID, so this +# denial is harmless. See https://bugzilla.redhat.com/show_bug.cgi?id=2330512#c10 +dontaudit pasta_t self:cap_userns { setgid setuid }; allow pasta_t self:user_namespace create; auth_read_passwd(pasta_t) @@ -122,17 +137,22 @@ domain_auto_trans(pasta_t, ping_exec_t, ping_t); allow pasta_t nsfs_t:file { open read }; -allow pasta_t user_home_t:dir getattr; -allow pasta_t user_home_t:file { open read getattr setattr }; +allow pasta_t user_home_t:dir { getattr search }; +allow pasta_t user_home_t:file { open read getattr setattr execute execute_no_trans map}; allow pasta_t user_home_dir_t:dir { search getattr open add_name read write }; allow pasta_t user_home_dir_t:file { create open read write }; allow pasta_t tmp_t:dir { add_name mounton remove_name write }; -allow pasta_t tmpfs_t:filesystem mount; +allow pasta_t tmpfs_t:filesystem { getattr mount }; allow pasta_t fs_t:filesystem unmount; allow pasta_t root_t:dir mounton; manage_files_pattern(pasta_t, pasta_pid_t, pasta_pid_t) files_pid_filetrans(pasta_t, pasta_pid_t, file) +allow pasta_t user_tmp_t:dir { add_name remove_name search write }; +allow pasta_t user_tmp_t:fifo_file append; +allow pasta_t user_tmp_t:file { create open write }; +allow pasta_t user_tmp_t:sock_file { create unlink }; + allow pasta_t console_device_t:chr_file { open write getattr ioctl }; allow pasta_t user_devpts_t:chr_file { getattr read write ioctl }; logging_send_syslog_msg(pasta_t) @@ -148,6 +168,11 @@ allow pasta_t tmp_t:sock_file { create unlink write }; allow pasta_t self:tcp_socket create_stream_socket_perms; corenet_tcp_sendrecv_generic_node(pasta_t) corenet_tcp_bind_generic_node(pasta_t) +allow pasta_t container_runtime_t:dir { open read search }; +allow pasta_t container_runtime_t:fifo_file { getattr write }; +allow pasta_t container_runtime_t:file read; +allow pasta_t container_runtime_t:lnk_file read; +allow pasta_t container_t:lnk_file read; allow pasta_t pasta_port_t:tcp_socket { name_bind name_connect }; allow pasta_t pasta_port_t:udp_socket { name_bind }; allow pasta_t http_port_t:tcp_socket { name_bind name_connect }; @@ -160,6 +185,8 @@ allow pasta_t self:udp_socket create_stream_socket_perms; allow pasta_t reserved_port_t:udp_socket name_bind; allow pasta_t llmnr_port_t:tcp_socket name_bind; allow pasta_t llmnr_port_t:udp_socket name_bind; +allow pasta_t http_cache_port_t:tcp_socket { name_bind name_connect }; +allow pasta_t unreserved_port_t:udp_socket name_bind; corenet_udp_sendrecv_generic_node(pasta_t) corenet_udp_bind_generic_node(pasta_t) allow pasta_t node_t:icmp_socket { name_bind node_bind }; @@ -203,3 +230,28 @@ allow pasta_t netutils_t:process { noatsecure rlimitinh siginh }; allow pasta_t ping_t:process { noatsecure rlimitinh siginh }; allow pasta_t user_tty_device_t:chr_file { append read write }; allow pasta_t user_devpts_t:chr_file { append read write }; + +# Allow network administration commands for non-privileged users +roleattribute container_user_r usernetctl_roles; +roleattribute staff_r usernetctl_roles; +roleattribute user_r usernetctl_roles; +role usernetctl_roles types pasta_t; + +# Make pasta in a container run under the pasta_t context +type_transition container_runtime_t pasta_exec_t : process pasta_t; +allow container_runtime_t pasta_t:process transition; + +# Label the user network namespace files +type_transition container_runtime_t user_tmp_t : dir ifconfig_var_run_t "netns"; +type_transition container_runtime_t user_tmp_t : dir ifconfig_var_run_t "rootless-netns"; +allow pasta_t ifconfig_var_run_t:dir { add_name open rmdir write }; +allow pasta_t ifconfig_var_run_t:file { create open write }; +allow systemd_user_runtimedir_t ifconfig_var_run_t:dir rmdir; + +# Allow pasta to bind to any port +bool pasta_bind_all_ports true; +if (pasta_bind_all_ports) { + allow pasta_t port_type:icmp_socket { accept getopt name_bind }; + allow pasta_t port_type:tcp_socket { accept getopt name_bind name_connect }; + allow pasta_t port_type:udp_socket { accept getopt name_bind }; +} |