The display manager lightdm (and I think gdm) start a dbus binary.
v3 - Updated based on feedback
type=AVC msg=audit(1544626796.378:201): avc: denied { execute } for pid=9973 comm="dbus-launch" name="dbus-daemon" dev="dm-1" ino=6695040 scontext=system_u:system_r:xdm_t:s0-s0:c0.c1023 tcontext=system_u:object_r:dbusd_exec_t:s0 tclass=file permissive=1
type=AVC msg=audit(1544626796.378:201): avc: denied { read open } for pid=9973 comm="dbus-launch" path="/usr/bin/dbus-daemon" dev="dm-1" ino=6695040 scontext=system_u:system_r:xdm_t:s0-s0:c0.c1023 tcontext=system_u:object_r:dbusd_exec_t:s0 tclass=file permissive=1
type=AVC msg=audit(1544626796.378:201): avc: denied { execute_no_trans } for pid=9973 comm="dbus-launch" path="/usr/bin/dbus-daemon" dev="dm-1" ino=6695040 scontext=system_u:system_r:xdm_t:s0-s0:c0.c1023 tcontext=system_u:object_r:dbusd_exec_t:s0 tclass=file permissive=1
type=AVC msg=audit(1544626796.378:201): avc: denied { map } for pid=9973 comm="dbus-daemon" path="/usr/bin/dbus-daemon" dev="dm-1" ino=6695040 scontext=system_u:system_r:xdm_t:s0-s0:c0.c1023 tcontext=system_u:object_r:dbusd_exec_t:s0 tclass=file permissive=1
type=AVC msg=audit(1546551459.112:208): avc: denied { getcap } for pid=6275 comm="dbus-daemon" scontext=system_u:system_r:xdm_t:s0-s0:c0.c1023 tcontext=system_u:system_r:xdm_t:s0-s0:c0.c1023 tclass=process permissive=1
type=AVC msg=audit(1546551459.116:209): avc: denied { read } for pid=6275 comm="dbus-daemon" name="995" dev="tmpfs" ino=35210 scontext=system_u:system_r:xdm_t:s0-s0:c0.c1023 tcontext=system_u:object_r:systemd_logind_var_run_t:s0 tclass=file permissive=1
type=AVC msg=audit(1546551459.116:209): avc: denied { open } for pid=6275 comm="dbus-daemon" path="/run/systemd/users/995" dev="tmpfs" ino=35210 scontext=system_u:system_r:xdm_t:s0-s0:c0.c1023 tcontext=system_u:object_r:systemd_logind_var_run_t:s0 tclass=file permissive=1
type=AVC msg=audit(1546551459.116:210): avc: denied { getattr } for pid=6275 comm="dbus-daemon" path="/run/systemd/users/995" dev="tmpfs" ino=35210 scontext=system_u:system_r:xdm_t:s0-s0:c0.c1023 tcontext=system_u:object_r:systemd_logind_var_run_t:s0 tclass=file permissive=1
Signed-off-by: Dave Sugar <[email protected]>
---
policy/modules/services/dbus.if | 19 +++++++++++++++++++
policy/modules/services/xserver.te | 7 +++++++
2 files changed, 26 insertions(+)
diff --git a/policy/modules/services/dbus.if b/policy/modules/services/dbus.if
index ef829e30..c815791e 100644
--- a/policy/modules/services/dbus.if
+++ b/policy/modules/services/dbus.if
@@ -17,6 +17,25 @@ interface(`dbus_stub',`
')
')
+########################################
+## <summary>
+## Execute dbus in the caller domain.
+## </summary>
+## <param name="domain">
+## <summary>
+## Domain allowed access.
+## </summary>
+## </param>
+#
+interface(`dbus_exec',`
+ gen_require(`
+ type dbusd_exec_t;
+ ')
+
+ corecmd_search_bin($1)
+ can_exec($1, dbusd_exec_t)
+')
+
########################################
## <summary>
## Role access for dbus.
diff --git a/policy/modules/services/xserver.te b/policy/modules/services/xserver.te
index fa7ce88e..c7714d3e 100644
--- a/policy/modules/services/xserver.te
+++ b/policy/modules/services/xserver.te
@@ -566,12 +566,19 @@ optional_policy(`
')
optional_policy(`
+ allow xdm_t self:process getcap;
+
+ dbus_exec(xdm_t)
dbus_system_bus_client(xdm_t)
dbus_connect_system_bus(xdm_t)
optional_policy(`
accountsd_dbus_chat(xdm_t)
')
+
+ optional_policy(`
+ systemd_read_logind_pids(xdm_t)
+ ')
')
optional_policy(`
--
2.20.1
These are changes needed when pam_fallock creates files in /run/faillock
(which is labeled faillog_t). sudo and xdm (and probably other domains)
will create files in this directory for successful and failed login
attempts.
v3 - Updated based on feedback
type=AVC msg=audit(1545153126.899:210): avc: denied { search } for pid=8448 comm="lightdm" name="faillock" dev="tmpfs" ino=39318 scontext=system_u:system_r:xdm_t:s0-s0:c0.c1023 tcontext=system_u:object_r:faillog_t:s0 tclass=dir permissive=1
type=AVC msg=audit(1545153131.090:214): avc: denied { write } for pid=8448 comm="lightdm" name="faillock" dev="tmpfs" ino=39318 scontext=system_u:system_r:xdm_t:s0-s0:c0.c1023 tcontext=system_u:object_r:faillog_t:s0 tclass=dir permissive=1
type=AVC msg=audit(1545153131.090:214): avc: denied { add_name } for pid=8448 comm="lightdm" name="dsugar" scontext=system_u:system_r:xdm_t:s0-s0:c0.c1023 tcontext=system_u:object_r:faillog_t:s0 tclass=dir permissive=1
type=AVC msg=audit(1545153131.090:214): avc: denied { create } for pid=8448 comm="lightdm" name="dsugar" scontext=system_u:system_r:xdm_t:s0-s0:c0.c1023 tcontext=system_u:object_r:faillog_t:s0 tclass=file permissive=1
type=AVC msg=audit(1545153131.091:215): avc: denied { setattr } for pid=8448 comm="lightdm" name="dsugar" dev="tmpfs" ino=87599 scontext=system_u:system_r:xdm_t:s0-s0:c0.c1023 tcontext=system_u:object_r:faillog_t:s0 tclass=file permissive=1
type=AVC msg=audit(1545167205.531:626): avc: denied { search } for pid=8264 comm="sudo" name="faillock" dev="tmpfs" ino=35405 scontext=sysadm_u:sysadm_r:cleaner_applyconfig_sudo_t:s0-s0:c0.c1023 tcontext=system_u:object_r:faillog_t:s0 tclass=dir permissive=1
type=AVC msg=audit(1545167205.531:627): avc: denied { write } for pid=8264 comm="sudo" name="faillock" dev="tmpfs" ino=35405 scontext=sysadm_u:sysadm_r:cleaner_applyconfig_sudo_t:s0-s0:c0.c1023 tcontext=system_u:object_r:faillog_t:s0 tclass=dir permissive=1
type=AVC msg=audit(1545167205.531:627): avc: denied { add_name } for pid=8264 comm="sudo" name="root" scontext=sysadm_u:sysadm_r:cleaner_applyconfig_sudo_t:s0-s0:c0.c1023 tcontext=system_u:object_r:faillog_t:s0 tclass=dir permissive=1
type=AVC msg=audit(1545167205.531:627): avc: denied { create } for pid=8264 comm="sudo" name="root" scontext=sysadm_u:sysadm_r:cleaner_applyconfig_sudo_t:s0-s0:c0.c1023 tcontext=sysadm_u:object_r:faillog_t:s0 tclass=file permissive=1
Signed-off-by: Dave Sugar <[email protected]>
---
policy/modules/admin/sudo.if | 2 +-
policy/modules/services/xserver.te | 1 -
policy/modules/system/authlogin.if | 38 ++++++++++++++++++++++++++++++
3 files changed, 39 insertions(+), 2 deletions(-)
diff --git a/policy/modules/admin/sudo.if b/policy/modules/admin/sudo.if
index 01f408ef..1c1fbe7b 100644
--- a/policy/modules/admin/sudo.if
+++ b/policy/modules/admin/sudo.if
@@ -116,8 +116,8 @@ template(`sudo_role_template',`
auth_run_chk_passwd($1_sudo_t, $2)
# sudo stores a token in the pam_pid directory
auth_manage_pam_pid($1_sudo_t)
+ auth_use_pam($1_sudo_t)
auth_pid_filetrans_pam_var_run($1_sudo_t, dir, "sudo")
- auth_use_nsswitch($1_sudo_t)
init_rw_utmp($1_sudo_t)
diff --git a/policy/modules/services/xserver.te b/policy/modules/services/xserver.te
index c7714d3e..edac2833 100644
--- a/policy/modules/services/xserver.te
+++ b/policy/modules/services/xserver.te
@@ -484,7 +484,6 @@ term_setattr_unallocated_ttys(xdm_t)
auth_domtrans_pam_console(xdm_t)
auth_manage_pam_pid(xdm_t)
auth_manage_pam_console_data(xdm_t)
-auth_rw_faillog(xdm_t)
auth_write_login_records(xdm_t)
# Run telinit->init to shutdown.
diff --git a/policy/modules/system/authlogin.if b/policy/modules/system/authlogin.if
index 9b5e0fe0..0153ab07 100644
--- a/policy/modules/system/authlogin.if
+++ b/policy/modules/system/authlogin.if
@@ -47,6 +47,7 @@ interface(`auth_use_pam',`
# for encrypted homedir
dev_read_sysfs($1)
+ auth_create_faillog_files($1)
auth_domtrans_chk_passwd($1)
auth_domtrans_upd_passwd($1)
auth_dontaudit_read_shadow($1)
@@ -54,6 +55,7 @@ interface(`auth_use_pam',`
auth_append_login_records($1)
auth_rw_lastlog($1)
auth_rw_faillog($1)
+ auth_setattr_faillog_files($1)
auth_exec_pam($1)
auth_use_nsswitch($1)
@@ -744,6 +746,24 @@ interface(`auth_append_faillog',`
allow $1 faillog_t:file append_file_perms;
')
+########################################
+## <summary>
+## Create fail log lock (in /run/faillock).
+## </summary>
+## <param name="domain">
+## <summary>
+## Domain allowed access.
+## </summary>
+## </param>
+#
+interface(`auth_create_faillog_files',`
+ gen_require(`
+ type faillog_t;
+ ')
+
+ create_files_pattern($1, faillog_t, faillog_t)
+')
+
########################################
## <summary>
## Read and write the login failure log.
@@ -782,6 +802,24 @@ interface(`auth_manage_faillog',`
logging_rw_generic_log_dirs($1)
')
+########################################
+## <summary>
+## Setattr the login failure logs.
+## </summary>
+## <param name="domain">
+## <summary>
+## Domain allowed access.
+## </summary>
+## </param>
+#
+interface(`auth_setattr_faillog_files',`
+ gen_require(`
+ type faillog_t;
+ ')
+
+ setattr_files_pattern($1, faillog_t, faillog_t)
+')
+
#######################################
## <summary>
## Read the last logins log.
--
2.20.1
On 1/6/19 1:31 PM, Sugar, David wrote:
> The display manager lightdm (and I think gdm) start a dbus binary.
>
> v3 - Updated based on feedback
>
> type=AVC msg=audit(1544626796.378:201): avc: denied { execute } for pid=9973 comm="dbus-launch" name="dbus-daemon" dev="dm-1" ino=6695040 scontext=system_u:system_r:xdm_t:s0-s0:c0.c1023 tcontext=system_u:object_r:dbusd_exec_t:s0 tclass=file permissive=1
> type=AVC msg=audit(1544626796.378:201): avc: denied { read open } for pid=9973 comm="dbus-launch" path="/usr/bin/dbus-daemon" dev="dm-1" ino=6695040 scontext=system_u:system_r:xdm_t:s0-s0:c0.c1023 tcontext=system_u:object_r:dbusd_exec_t:s0 tclass=file permissive=1
> type=AVC msg=audit(1544626796.378:201): avc: denied { execute_no_trans } for pid=9973 comm="dbus-launch" path="/usr/bin/dbus-daemon" dev="dm-1" ino=6695040 scontext=system_u:system_r:xdm_t:s0-s0:c0.c1023 tcontext=system_u:object_r:dbusd_exec_t:s0 tclass=file permissive=1
> type=AVC msg=audit(1544626796.378:201): avc: denied { map } for pid=9973 comm="dbus-daemon" path="/usr/bin/dbus-daemon" dev="dm-1" ino=6695040 scontext=system_u:system_r:xdm_t:s0-s0:c0.c1023 tcontext=system_u:object_r:dbusd_exec_t:s0 tclass=file permissive=1
> type=AVC msg=audit(1546551459.112:208): avc: denied { getcap } for pid=6275 comm="dbus-daemon" scontext=system_u:system_r:xdm_t:s0-s0:c0.c1023 tcontext=system_u:system_r:xdm_t:s0-s0:c0.c1023 tclass=process permissive=1
>
> type=AVC msg=audit(1546551459.116:209): avc: denied { read } for pid=6275 comm="dbus-daemon" name="995" dev="tmpfs" ino=35210 scontext=system_u:system_r:xdm_t:s0-s0:c0.c1023 tcontext=system_u:object_r:systemd_logind_var_run_t:s0 tclass=file permissive=1
> type=AVC msg=audit(1546551459.116:209): avc: denied { open } for pid=6275 comm="dbus-daemon" path="/run/systemd/users/995" dev="tmpfs" ino=35210 scontext=system_u:system_r:xdm_t:s0-s0:c0.c1023 tcontext=system_u:object_r:systemd_logind_var_run_t:s0 tclass=file permissive=1
> type=AVC msg=audit(1546551459.116:210): avc: denied { getattr } for pid=6275 comm="dbus-daemon" path="/run/systemd/users/995" dev="tmpfs" ino=35210 scontext=system_u:system_r:xdm_t:s0-s0:c0.c1023 tcontext=system_u:object_r:systemd_logind_var_run_t:s0 tclass=file permissive=1
>
> Signed-off-by: Dave Sugar <[email protected]>
> ---
> policy/modules/services/dbus.if | 19 +++++++++++++++++++
> policy/modules/services/xserver.te | 7 +++++++
> 2 files changed, 26 insertions(+)
>
> diff --git a/policy/modules/services/dbus.if b/policy/modules/services/dbus.if
> index ef829e30..c815791e 100644
> --- a/policy/modules/services/dbus.if
> +++ b/policy/modules/services/dbus.if
> @@ -17,6 +17,25 @@ interface(`dbus_stub',`
> ')
> ')
>
> +########################################
> +## <summary>
> +## Execute dbus in the caller domain.
> +## </summary>
> +## <param name="domain">
> +## <summary>
> +## Domain allowed access.
> +## </summary>
> +## </param>
> +#
> +interface(`dbus_exec',`
> + gen_require(`
> + type dbusd_exec_t;
> + ')
> +
> + corecmd_search_bin($1)
> + can_exec($1, dbusd_exec_t)
> +')
> +
> ########################################
> ## <summary>
> ## Role access for dbus.
> diff --git a/policy/modules/services/xserver.te b/policy/modules/services/xserver.te
> index fa7ce88e..c7714d3e 100644
> --- a/policy/modules/services/xserver.te
> +++ b/policy/modules/services/xserver.te
> @@ -566,12 +566,19 @@ optional_policy(`
> ')
>
> optional_policy(`
> + allow xdm_t self:process getcap;
> +
> + dbus_exec(xdm_t)
> dbus_system_bus_client(xdm_t)
> dbus_connect_system_bus(xdm_t)
>
> optional_policy(`
> accountsd_dbus_chat(xdm_t)
> ')
> +
> + optional_policy(`
> + systemd_read_logind_pids(xdm_t)
> + ')
> ')
>
> optional_policy(`
Merged.
--
Chris PeBenito
On 1/6/19 1:31 PM, Sugar, David wrote:
> These are changes needed when pam_fallock creates files in /run/faillock
> (which is labeled faillog_t). sudo and xdm (and probably other domains)
> will create files in this directory for successful and failed login
> attempts.
>
> v3 - Updated based on feedback
>
> type=AVC msg=audit(1545153126.899:210): avc: denied { search } for pid=8448 comm="lightdm" name="faillock" dev="tmpfs" ino=39318 scontext=system_u:system_r:xdm_t:s0-s0:c0.c1023 tcontext=system_u:object_r:faillog_t:s0 tclass=dir permissive=1
> type=AVC msg=audit(1545153131.090:214): avc: denied { write } for pid=8448 comm="lightdm" name="faillock" dev="tmpfs" ino=39318 scontext=system_u:system_r:xdm_t:s0-s0:c0.c1023 tcontext=system_u:object_r:faillog_t:s0 tclass=dir permissive=1
> type=AVC msg=audit(1545153131.090:214): avc: denied { add_name } for pid=8448 comm="lightdm" name="dsugar" scontext=system_u:system_r:xdm_t:s0-s0:c0.c1023 tcontext=system_u:object_r:faillog_t:s0 tclass=dir permissive=1
> type=AVC msg=audit(1545153131.090:214): avc: denied { create } for pid=8448 comm="lightdm" name="dsugar" scontext=system_u:system_r:xdm_t:s0-s0:c0.c1023 tcontext=system_u:object_r:faillog_t:s0 tclass=file permissive=1
> type=AVC msg=audit(1545153131.091:215): avc: denied { setattr } for pid=8448 comm="lightdm" name="dsugar" dev="tmpfs" ino=87599 scontext=system_u:system_r:xdm_t:s0-s0:c0.c1023 tcontext=system_u:object_r:faillog_t:s0 tclass=file permissive=1
>
> type=AVC msg=audit(1545167205.531:626): avc: denied { search } for pid=8264 comm="sudo" name="faillock" dev="tmpfs" ino=35405 scontext=sysadm_u:sysadm_r:cleaner_applyconfig_sudo_t:s0-s0:c0.c1023 tcontext=system_u:object_r:faillog_t:s0 tclass=dir permissive=1
> type=AVC msg=audit(1545167205.531:627): avc: denied { write } for pid=8264 comm="sudo" name="faillock" dev="tmpfs" ino=35405 scontext=sysadm_u:sysadm_r:cleaner_applyconfig_sudo_t:s0-s0:c0.c1023 tcontext=system_u:object_r:faillog_t:s0 tclass=dir permissive=1
> type=AVC msg=audit(1545167205.531:627): avc: denied { add_name } for pid=8264 comm="sudo" name="root" scontext=sysadm_u:sysadm_r:cleaner_applyconfig_sudo_t:s0-s0:c0.c1023 tcontext=system_u:object_r:faillog_t:s0 tclass=dir permissive=1
> type=AVC msg=audit(1545167205.531:627): avc: denied { create } for pid=8264 comm="sudo" name="root" scontext=sysadm_u:sysadm_r:cleaner_applyconfig_sudo_t:s0-s0:c0.c1023 tcontext=sysadm_u:object_r:faillog_t:s0 tclass=file permissive=1
>
> Signed-off-by: Dave Sugar <[email protected]>
> ---
> policy/modules/admin/sudo.if | 2 +-
> policy/modules/services/xserver.te | 1 -
> policy/modules/system/authlogin.if | 38 ++++++++++++++++++++++++++++++
> 3 files changed, 39 insertions(+), 2 deletions(-)
>
> diff --git a/policy/modules/admin/sudo.if b/policy/modules/admin/sudo.if
> index 01f408ef..1c1fbe7b 100644
> --- a/policy/modules/admin/sudo.if
> +++ b/policy/modules/admin/sudo.if
> @@ -116,8 +116,8 @@ template(`sudo_role_template',`
> auth_run_chk_passwd($1_sudo_t, $2)
> # sudo stores a token in the pam_pid directory
> auth_manage_pam_pid($1_sudo_t)
> + auth_use_pam($1_sudo_t)
> auth_pid_filetrans_pam_var_run($1_sudo_t, dir, "sudo")
> - auth_use_nsswitch($1_sudo_t)
>
> init_rw_utmp($1_sudo_t)
>
> diff --git a/policy/modules/services/xserver.te b/policy/modules/services/xserver.te
> index c7714d3e..edac2833 100644
> --- a/policy/modules/services/xserver.te
> +++ b/policy/modules/services/xserver.te
> @@ -484,7 +484,6 @@ term_setattr_unallocated_ttys(xdm_t)
> auth_domtrans_pam_console(xdm_t)
> auth_manage_pam_pid(xdm_t)
> auth_manage_pam_console_data(xdm_t)
> -auth_rw_faillog(xdm_t)
> auth_write_login_records(xdm_t)
>
> # Run telinit->init to shutdown.
> diff --git a/policy/modules/system/authlogin.if b/policy/modules/system/authlogin.if
> index 9b5e0fe0..0153ab07 100644
> --- a/policy/modules/system/authlogin.if
> +++ b/policy/modules/system/authlogin.if
> @@ -47,6 +47,7 @@ interface(`auth_use_pam',`
> # for encrypted homedir
> dev_read_sysfs($1)
>
> + auth_create_faillog_files($1)
> auth_domtrans_chk_passwd($1)
> auth_domtrans_upd_passwd($1)
> auth_dontaudit_read_shadow($1)
> @@ -54,6 +55,7 @@ interface(`auth_use_pam',`
> auth_append_login_records($1)
> auth_rw_lastlog($1)
> auth_rw_faillog($1)
> + auth_setattr_faillog_files($1)
> auth_exec_pam($1)
> auth_use_nsswitch($1)
>
> @@ -744,6 +746,24 @@ interface(`auth_append_faillog',`
> allow $1 faillog_t:file append_file_perms;
> ')
>
> +########################################
> +## <summary>
> +## Create fail log lock (in /run/faillock).
> +## </summary>
> +## <param name="domain">
> +## <summary>
> +## Domain allowed access.
> +## </summary>
> +## </param>
> +#
> +interface(`auth_create_faillog_files',`
> + gen_require(`
> + type faillog_t;
> + ')
> +
> + create_files_pattern($1, faillog_t, faillog_t)
> +')
> +
> ########################################
> ## <summary>
> ## Read and write the login failure log.
> @@ -782,6 +802,24 @@ interface(`auth_manage_faillog',`
> logging_rw_generic_log_dirs($1)
> ')
>
> +########################################
> +## <summary>
> +## Setattr the login failure logs.
> +## </summary>
> +## <param name="domain">
> +## <summary>
> +## Domain allowed access.
> +## </summary>
> +## </param>
> +#
> +interface(`auth_setattr_faillog_files',`
> + gen_require(`
> + type faillog_t;
> + ')
> +
> + setattr_files_pattern($1, faillog_t, faillog_t)
> +')
> +
> #######################################
> ## <summary>
> ## Read the last logins log.
>
Merged.
--
Chris PeBenito