add userhelper

This commit is contained in:
Chris PeBenito 2006-01-18 16:40:04 +00:00
parent 6d14093b26
commit 7c2f5a82ae
10 changed files with 538 additions and 13 deletions

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@ -1,5 +1,6 @@
- Added modules:
portage
userhelper
usernetctl
* Tue Jan 17 2006 Chris PeBenito <selinux@tresys.com> - 20060117

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@ -0,0 +1,9 @@
#
# /etc
#
/etc/security/console.apps(/.*)? gen_context(system_u:object_r:userhelper_conf_t,s0)
#
# /usr
#
/usr/sbin/userhelper -- gen_context(system_u:object_r:userhelper_exec_t,s0)

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@ -0,0 +1,217 @@
## <summary>SELinux utility to run a shell with a new role</summary>
#######################################
## <summary>
## The per user domain template for the userhelper module.
## </summary>
## <desc>
## <p>
## This template creates a derived domains which are used
## for userhelper.
## </p>
## <p>
## This template is invoked automatically for each user, and
## generally does not need to be invoked directly
## by policy writers.
## </p>
## </desc>
## <param name="userdomain_prefix">
## The prefix of the user domain (e.g., user
## is the prefix for user_t).
## </param>
## <param name="user_domain">
## The type of the user domain.
## </param>
## <param name="user_role">
## The role associated with the user domain.
## </param>
#
template(`userhelper_per_userdomain_template',`
gen_require(`
type userhelper_exec_t, userhelper_conf_t;
')
########################################
#
# Declarations
#
type $1_userhelper_t;
domain_type($1_userhelper_t)
domain_entry_file($1_userhelper_t,userhelper_exec_t)
domain_role_change_exempt($1_userhelper_t)
domain_obj_id_change_exempt($1_userhelper_t)
domain_wide_inherit_fd($1_userhelper_t)
domain_subj_id_change_exempt($1_userhelper_t)
role system_r types $1_userhelper_t;
########################################
#
# Local policy
#
allow $1_userhelper_t self:capability { setuid setgid net_bind_service dac_override chown sys_tty_config };
allow $1_userhelper_t self:process ~{ ptrace setcurrent setexec setfscreate setrlimit execmem execstack execheap };
allow $1_userhelper_t self:fd use;
allow $1_userhelper_t self:fifo_file rw_file_perms;
allow $1_userhelper_t self:shm create_shm_perms;
allow $1_userhelper_t self:sem create_sem_perms;
allow $1_userhelper_t self:msgq create_msgq_perms;
allow $1_userhelper_t self:msg { send receive };
allow $1_userhelper_t self:unix_dgram_socket create_socket_perms;
allow $1_userhelper_t self:unix_stream_socket create_stream_socket_perms;
allow $1_userhelper_t self:unix_dgram_socket sendto;
allow $1_userhelper_t self:unix_stream_socket connectto;
allow $1_userhelper_t self:sock_file r_file_perms;
#Transition to the derived domain.
domain_auto_trans($2,userhelper_exec_t,$1_userhelper_t)
allow $2 $1_userhelper_t:fd use;
allow $1_userhelper_t $2:fd use;
allow $1_userhelper_t $2:fifo_file rw_file_perms;
allow $1_userhelper_t $2:process sigchld;
allow $1_userhelper_t self:process setexec;
allow $1_userhelper_t userhelper_conf_t:file rw_file_perms;
allow $1_userhelper_t userhelper_conf_t:dir rw_dir_perms;
can_exec($1_userhelper_t, userhelper_exec_t)
dontaudit $2 $1_userhelper_t:process signal;
kernel_read_all_sysctl($1_userhelper_t)
kernel_getattr_debugfs($1_userhelper_t)
kernel_read_system_state($1_userhelper_t)
# Execute shells
corecmd_exec_shell($1_userhelper_t)
# By default, revert to the calling domain when a program is executed
corecmd_bin_domtrans($1_userhelper_t,$2)
corecmd_sbin_domtrans($1_userhelper_t,$2)
# Inherit descriptors from the current session.
domain_use_wide_inherit_fd($1_userhelper_t)
# for when the user types "exec userhelper" at the command line
domain_sigchld_wide_inherit_fd($1_userhelper_t)
dev_read_urand($1_userhelper_t)
# Read /dev directories and any symbolic links.
dev_list_all_dev_nodes($1_userhelper_t)
files_list_var_lib($1_userhelper_t)
# Write to utmp.
files_filetrans_pid($1_userhelper_t,initrc_var_run_t)
# Read the /etc/security/default_type file
files_read_etc_files($1_userhelper_t)
# Read /var.
files_read_var_files($1_userhelper_t)
files_read_var_symlink($1_userhelper_t)
# for some PAM modules and for cwd
files_search_home($1_userhelper_t)
fs_search_auto_mountpoints($1_userhelper_t)
fs_read_nfs_files($1_userhelper_t)
fs_read_nfs_symlinks($1_userhelper_t)
# Allow $1_userhelper to obtain contexts to relabel TTYs
selinux_get_fs_mount($1_userhelper_t)
selinux_validate_context($1_userhelper_t)
selinux_compute_access_vector($1_userhelper_t)
selinux_compute_create_context($1_userhelper_t)
selinux_compute_relabel_context($1_userhelper_t)
selinux_compute_user_contexts($1_userhelper_t)
# Read the devpts root directory.
term_list_ptys($1_userhelper_t)
# Relabel terminals.
term_relabel_all_user_ttys($1_userhelper_t)
term_relabel_all_user_ptys($1_userhelper_t)
# Access terminals.
term_use_all_user_ttys($1_userhelper_t)
term_use_all_user_ptys($1_userhelper_t)
auth_domtrans_chk_passwd($1_userhelper_t)
auth_manage_pam_pid($1_userhelper_t)
auth_manage_var_auth($1_userhelper_t)
auth_search_pam_console_data($1_userhelper_t)
# Inherit descriptors from the current session.
init_use_fd($1_userhelper_t)
# Write to utmp.
init_manage_utmp($1_userhelper_t)
libs_use_ld_so($1_userhelper_t)
libs_use_shared_libs($1_userhelper_t)
miscfiles_read_localization($1_userhelper_t)
seutil_read_config($1_userhelper_t)
seutil_read_default_contexts($1_userhelper_t)
userdom_use_unpriv_users_fd($1_userhelper_t)
# Allow $1_userhelper_t to transition to user domains.
userdom_bin_spec_domtrans_unpriv_users($1_userhelper_t)
userdom_sbin_spec_domtrans_unpriv_users($1_userhelper_t)
userdom_entry_spec_domtrans_unpriv_users($1_userhelper_t)
ifdef(`distro_redhat',`
optional_policy(`rpm',`
# Allow transitioning to rpm_t, for up2date
rpm_domtrans($1_userhelper_t)
')
')
tunable_policy(`! secure_mode',`
#if we are not in secure mode then we can transition to sysadm_t
userdom_bin_spec_domtrans_sysadm($1_userhelper_t)
userdom_sbin_spec_domtrans_sysadm($1_userhelper_t)
userdom_entry_spec_domtrans_sysadm($1_userhelper_t)
')
optional_policy(`logging',`
logging_send_syslog_msg($1_userhelper_t)
')
optional_policy(`nis',`
nis_use_ypbind($1_userhelper_t)
')
optional_policy(`nscd',`
nscd_use_socket($1_userhelper_t)
')
ifdef(`TODO',`
allow $1_userhelper_t xdm_t:fd use;
allow $1_userhelper_t xdm_var_run_t:dir search;
allow $1_userhelper_t xdm_t:fifo_file { getattr read write ioctl };
optional_policy(`gnome-pty-helper.te',`
allow $1_userhelper_t gphdomain:fd use;
')
optional_policy(`xauth', `
domain_auto_trans($1_userhelper_t, xauth_exec_t, $1_xauth_t)
allow $1_userhelper_t $1_xauth_home_t:file { getattr read };
')
optional_policy(`mozilla', `
domain_auto_trans($1_mozilla_t, userhelper_exec_t, $1_userhelper_t)
')
# for when the network connection is killed
dontaudit unpriv_userdomain $1_userhelper_t:process signal;
')
')
########################################
## <summary>
## Do not audit attempts to search userhelp configuration
## </summary>
## <param name="domain">
## The type of the process performing this action.
## </param>
#
interface(`userhelper_dontaudit_search_config',`
gen_require(`
type userhelper_conf_t;
')
dontaudit $1 userhelper_conf_t:dir search;
')

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@ -0,0 +1,13 @@
policy_module(userhelper,1.0.0)
########################################
#
# Declarations
#
type userhelper_conf_t;
files_type(userhelper_conf_t)
type userhelper_exec_t;
files_type(userhelper_conf_t)

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@ -239,6 +239,49 @@ interface(`corecmd_mmap_bin_files',`
allow $1 bin_t:file { getattr read execute };
')
########################################
## <summary>
## Execute a file in a bin directory
## in the specified domain but do not
## do it automatically. This is an explicit
## transition, requiring the caller to use setexeccon().
## </summary>
## <desc>
## <p>
## Execute a file in a bin directory
## in the specified domain. This allows
## the specified domain to execute any file
## on these filesystems in the specified
## domain. This is not suggested.
## </p>
## <p>
## No interprocess communication (signals, pipes,
## etc.) is provided by this interface since
## the domains are not owned by this module.
## </p>
## <p>
## This interface was added to handle
## the userhelper policy.
## </p>
## </desc>
## <param name="domain">
## Domain allowed access.
## </param>
## <param name="target_domain">
## The type of the new process.
## </param>
#
interface(`corecmd_bin_spec_domtrans',`
gen_require(`
type bin_t;
')
allow $1 bin_t:dir search;
allow $1 bin_t:lnk_file { getattr read };
domain_trans($1,bin_t,$2)
')
########################################
## <summary>
## Execute a file in a bin directory
@ -272,14 +315,10 @@ interface(`corecmd_mmap_bin_files',`
interface(`corecmd_bin_domtrans',`
gen_require(`
type bin_t;
class dir search;
class lnk_file { getattr read };
')
allow $1 bin_t:dir search;
allow $1 bin_t:lnk_file { getattr read };
domain_auto_trans($1,bin_t,$2)
corecmd_bin_spec_domtrans($1,$2)
type_transition $1 bin_t:process $2;
')
########################################
@ -539,6 +578,49 @@ interface(`corecmd_sbin_domtrans',`
domain_auto_trans($1,sbin_t,$2)
')
########################################
## <summary>
## Execute a file in a sbin directory
## in the specified domain but do not
## do it automatically. This is an explicit
## transition, requiring the caller to use setexeccon().
## </summary>
## <desc>
## <p>
## Execute a file in a sbin directory
## in the specified domain. This allows
## the specified domain to execute any file
## on these filesystems in the specified
## domain. This is not suggested.
## </p>
## <p>
## No interprocess communication (signals, pipes,
## etc.) is provided by this interface since
## the domains are not owned by this module.
## </p>
## <p>
## This interface was added to handle
## the userhelper policy.
## </p>
## </desc>
## <param name="domain">
## Domain allowed access.
## </param>
## <param name="target_domain">
## The type of the new process.
## </param>
#
interface(`corecmd_sbin_spec_domtrans',`
gen_require(`
type sbin_t;
')
allow $1 sbin_t:dir search;
allow $1 sbin_t:lnk_file { getattr read };
domain_trans($1,sbin_t,$2)
')
########################################
## <summary>
## Check if a shell is executable (DAC-wise).
@ -564,8 +646,6 @@ interface(`corecmd_check_exec_shell',`
interface(`corecmd_exec_shell',`
gen_require(`
type bin_t, shell_exec_t;
class dir r_dir_perms;
class lnk_file r_file_perms;
')
allow $1 bin_t:dir r_dir_perms;
@ -580,8 +660,6 @@ interface(`corecmd_exec_shell',`
interface(`corecmd_exec_ls',`
gen_require(`
type bin_t, ls_exec_t;
class dir r_dir_perms;
class lnk_file r_file_perms;
')
allow $1 bin_t:dir r_dir_perms;
@ -617,8 +695,6 @@ interface(`corecmd_exec_ls',`
interface(`corecmd_shell_spec_domtrans',`
gen_require(`
type bin_t, shell_exec_t;
class dir r_dir_perms;
class lnk_file r_file_perms;
')
allow $1 bin_t:dir r_dir_perms;

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@ -1072,6 +1072,23 @@ interface(`domain_mmap_all_entry_files',`
allow $1 entry_type:file { getattr read execute };
')
########################################
## <summary>
## Execute an entry_type in the specified domain.
## </summary>
## <param name="domain">
## The type of the process performing this action.
## </param>
#
# cjp: added for userhelper
interface(`domain_entry_spec_domtrans',`
gen_require(`
attribute entry_type;
')
domain_trans($1,entry_type,$2)
')
########################################
## <summary>
## Unconfined access to domains.

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@ -1,5 +1,5 @@
policy_module(xdm,1.1.0)
policy_module(xdm,1.1.1)
########################################
#
@ -102,6 +102,10 @@ optional_policy(`locallogin',`
locallogin_signull(xdm_t)
')
optional_policy(`userhelper',`
userhelper_dontaudit_search_config(xdm_t)
')
ifdef(`TODO',`
# cjp: TODO: integrate strict policy:
daemon_domain(xdm, `, privuser, privrole, auth_chkpwd, privowner, privmem, nscd_client_domain')

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@ -586,6 +586,26 @@ interface(`auth_exec_pam',`
can_exec($1,pam_exec_t)
')
########################################
## <summary>
## Manage var auth files. Used by various other applications
## and pam applets etc.
## </summary>
## <param name="domain">
## The type of the process performing this action.
## </param>
#
interface(`auth_manage_var_auth',`
gen_require(`
type var_auth_t;
')
files_search_var($1)
allow $1 var_auth_t:dir create_dir_perms;
allow $1 var_auth_t:file rw_file_perms;
allow $1 var_auth_t:lnk_file rw_file_perms;
')
#######################################
#
# auth_read_pam_pid(domain)
@ -638,6 +658,24 @@ interface(`auth_delete_pam_pid',`
allow $1 pam_var_run_t:file { getattr unlink };
')
########################################
## <summary>
## Manage pam PID files.
## </summary>
## <param name="domain">
## The type of the process performing this action.
## </param>
#
interface(`auth_manage_pam_pid',`
gen_require(`
type pam_var_run_t;
')
files_search_pids($1)
allow $1 pam_var_run_t:dir create_dir_perms;
allow $1 pam_var_run_t:file create_file_perms;
')
#######################################
#
# auth_domtrans_pam_console(domain)

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@ -873,3 +873,19 @@ interface(`init_dontaudit_rw_script_pid',`
dontaudit $1 initrc_var_run_t:file { getattr read write append };
')
########################################
## <summary>
## Manage init files like utmp.
## </summary>
## <param name="domain">
## Domain access allowed.
## </param>
#
interface(`init_manage_utmp',`
gen_require(`
type initrc_var_run_t;
')
files_search_pids($1)
allow $1 initrc_var_run_t:file create_file_perms;
')

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@ -2388,6 +2388,75 @@ interface(`userdom_manage_unpriv_user_shared_mem',`
allow $1 unpriv_userdomain:shm create_shm_perms;
')
########################################
## <summary>
## Execute bin_t in the unprivileged user domains. This
## is an explicit transition, requiring the
## caller to use setexeccon().
## </summary>
## <param name="domain">
## Domain allowed access.
## </param>
#
interface(`userdom_bin_spec_domtrans_unpriv_users',`
gen_require(`
attribute unpriv_userdomain;
')
corecmd_bin_spec_domtrans($1,unpriv_userdomain)
allow $1 unpriv_userdomain:fd use;
allow unpriv_userdomain $1:fd use;
allow unpriv_userdomain $1:fifo_file rw_file_perms;
allow unpriv_userdomain $1:process sigchld;
')
########################################
## <summary>
## Execute generic sbin programs in all unprivileged user
## domains. This is an explicit transition, requiring the
## caller to use setexeccon().
## </summary>
## <param name="domain">
## Domain allowed access.
## </param>
#
interface(`userdom_sbin_spec_domtrans_unpriv_users',`
gen_require(`
attribute unpriv_userdomain;
')
corecmd_sbin_spec_domtrans($1,unpriv_userdomain)
allow $1 unpriv_userdomain:fd use;
allow unpriv_userdomain $1:fd use;
allow unpriv_userdomain $1:fifo_file rw_file_perms;
allow unpriv_userdomain $1:process sigchld;
')
########################################
## <summary>
## Execute all entrypoint files in unprivileged user
## domains. This is an explicit transition, requiring the
## caller to use setexeccon().
## </summary>
## <param name="domain">
## Domain allowed access.
## </param>
#
interface(`userdom_entry_spec_domtrans_unpriv_users',`
gen_require(`
attribute unpriv_userdomain;
')
domain_entry_spec_domtrans($1,unpriv_userdomain)
allow $1 unpriv_userdomain:fd use;
allow unpriv_userdomain $1:fd use;
allow unpriv_userdomain $1:fifo_file rw_file_perms;
allow unpriv_userdomain $1:process sigchld;
')
########################################
## <summary>
## Execute a shell in the sysadm domain.
@ -2414,6 +2483,71 @@ interface(`userdom_shell_domtrans_sysadm',`
')
')
########################################
## <summary>
## Execute a generic bin program in the sysadm domain.
## </summary>
## <param name="domain">
## Domain allowed access.
## </param>
#
interface(`userdom_bin_spec_domtrans_sysadm',`
gen_require(`
type sysadm_t;
')
corecmd_bin_spec_domtrans($1,sysadm_t)
allow $1 sysadm_t:fd use;
allow sysadm_t $1:fd use;
allow sysadm_t $1:fifo_file rw_file_perms;
allow sysadm_t $1:process sigchld;
')
########################################
## <summary>
## Execute a generic sbin program in the sysadm domain.
## </summary>
## <param name="domain">
## Domain allowed access.
## </param>
#
interface(`userdom_sbin_spec_domtrans_sysadm',`
gen_require(`
type sysadm_t;
')
corecmd_sbin_spec_domtrans($1,sysadm_t)
allow $1 sysadm_t:fd use;
allow sysadm_t $1:fd use;
allow sysadm_t $1:fifo_file rw_file_perms;
allow sysadm_t $1:process sigchld;
')
########################################
## <summary>
## Execute all entrypoint files in the sysadm domain. This
## is an explicit transition, requiring the
## caller to use setexeccon().
## </summary>
## <param name="domain">
## Domain allowed access.
## </param>
#
interface(`userdom_entry_spec_domtrans_sysadm',`
gen_require(`
type sysadm_t;
')
domain_entry_spec_domtrans($1,sysadm_t)
allow $1 sysadm_t:fd use;
allow sysadm_t $1:fd use;
allow sysadm_t $1:fifo_file rw_file_perms;
allow sysadm_t $1:process sigchld;
')
########################################
## <summary>
## Search the staff users home directory.