CaROS/meta-selinux
3
0
Fork 0
mirror of git://git.yoctoproject.org/meta-selinux synced 2026-01-01 13:58:04 +00:00
Code Issues Packages Projects Releases Wiki Activity

refpolicy: fix login errors after enabling systemd DynamicUser

Browse Source 
After oe-ocre commit ba3a78c0[1], domains using PAM need to read
/etc/shadow.

[1] https://git.openembedded.org/openembedded-core/commit/?id=ba3a78c08cb0ce08afde049610d3172b9e3b0695

Signed-off-by: Yi Zhao <yi.zhao@windriver.com>
Signed-off-by: Joe MacDonald <joe@deserted.net>
This commit is contained in:
Yi Zhao 2023-12-08 16:43:33 +08:00 committed by Joe MacDonald
parent fd039518bd
commit 3fb3324540
2 changed files with 105 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

104
recipes-security/refpolicy/refpolicy/0055-policy-modules-system-authlogin-fix-login-errors-aft.patch Normal file
View File

@ -0,0 +1,104 @@
From 2824a6c927bf6df4be997a138a27d159d533d08b Mon Sep 17 00:00:00 2001
From: Yi Zhao <yi.zhao@windriver.com>
Date: Fri, 8 Dec 2023 14:16:26 +0800
Subject: [PATCH] policy/modules/system/authlogin: fix login errors after
enabling systemd DynamicUser
Allow domains using PAM to read /etc/shadow to fix login errors after
enabling systemd DynamicUser.
Fixes:
avc: denied { read } for pid=434 comm="login" name="shadow"
dev="sda2" ino=26314
scontext=system_u:system_r:local_login_t:s0-s15:c0.c1023
tcontext=system_u:object_r:shadow_t:s0 tclass=file permissive=1
avc: denied { open } for pid=434 comm="login" path="/etc/shadow"
dev="sda2" ino=26314
scontext=system_u:system_r:local_login_t:s0-s15:c0.c1023
tcontext=system_u:object_r:shadow_t:s0 tclass=file permissive=1
avc: denied { getattr } for pid=434 comm="login" path="/etc/shadow"
dev="sda2" ino=26314
scontext=system_u:system_r:local_login_t:s0-s15:c0.c1023
tcontext=system_u:object_r:shadow_t:s0 tclass=file permissive=1
avc: denied { read } for pid=457 comm="sshd" name="shadow" dev="sda2"
ino=26314 scontext=system_u:system_r:sshd_t:s0-s15:c0.c1023
tcontext=system_u:object_r:shadow_t:s0 tclass=file permissive=1
avc: denied { open } for pid=457 comm="sshd" path="/etc/shadow"
dev="sda2" ino=26314 scontext=system_u:system_r:sshd_t:s0-s15:c0.c1023
tcontext=system_u:object_r:shadow_t:s0 tclass=file permissive=1
avc: denied { getattr } for pid=457 comm="sshd" path="/etc/shadow"
dev="sda2" ino=26314 scontext=system_u:system_r:sshd_t:s0-s15:c0.c1023
tcontext=system_u:object_r:shadow_t:s0 tclass=file permissive=1
Upstream-Status: Inappropriate [embedded specific]
Signed-off-by: Yi Zhao <yi.zhao@windriver.com>
---
policy/modules/admin/su.if | 4 ++--
policy/modules/system/authlogin.te | 2 +-
policy/modules/system/selinuxutil.te | 2 ++
3 files changed, 5 insertions(+), 3 deletions(-)
diff --git a/policy/modules/admin/su.if b/policy/modules/admin/su.if
index cd34cd9dd..b867f58b9 100644
--- a/policy/modules/admin/su.if
+++ b/policy/modules/admin/su.if
@@ -75,7 +75,7 @@ template(`su_restricted_domain_template', `
selinux_compute_access_vector($1_su_t)
auth_domtrans_chk_passwd($1_su_t)
- auth_dontaudit_read_shadow($1_su_t)
+ auth_read_shadow($1_su_t)
auth_use_nsswitch($1_su_t)
auth_rw_faillog($1_su_t)
@@ -176,7 +176,7 @@ template(`su_role_template',`
selinux_use_status_page($1_su_t)
auth_domtrans_chk_passwd($1_su_t)
- auth_dontaudit_read_shadow($1_su_t)
+ auth_read_shadow($1_su_t)
auth_use_nsswitch($1_su_t)
auth_rw_faillog($1_su_t)
diff --git a/policy/modules/system/authlogin.te b/policy/modules/system/authlogin.te
index 3a5d1ac3e..f9d50a8d4 100644
--- a/policy/modules/system/authlogin.te
+++ b/policy/modules/system/authlogin.te
@@ -10,7 +10,7 @@ policy_module(authlogin)
## Allow PAM usage. If disabled, read access /etc/shadow is allowed for domains that normally use PAM.
## </p>
## </desc>
-gen_tunable(authlogin_pam, true)
+gen_tunable(authlogin_pam, false)
## <desc>
## <p>
diff --git a/policy/modules/system/selinuxutil.te b/policy/modules/system/selinuxutil.te
index f9b735081..6ec5e2cd4 100644
--- a/policy/modules/system/selinuxutil.te
+++ b/policy/modules/system/selinuxutil.te
@@ -246,6 +246,7 @@ allow newrole_t self:netlink_audit_socket { create_netlink_socket_perms nlmsg_re
read_files_pattern(newrole_t, default_context_t, default_context_t)
read_lnk_files_pattern(newrole_t, default_context_t, default_context_t)
+kernel_getattr_proc(newrole_t)
kernel_read_system_state(newrole_t)
kernel_read_kernel_sysctls(newrole_t)
@@ -288,6 +289,7 @@ auth_use_nsswitch(newrole_t)
auth_run_chk_passwd(newrole_t, newrole_roles)
auth_run_upd_passwd(newrole_t, newrole_roles)
auth_rw_faillog(newrole_t)
+auth_read_shadow(newrole_t)
# Write to utmp.
init_rw_utmp(newrole_t)
--
2.25.1

1
recipes-security/refpolicy/refpolicy_common.inc
View File

@ -70,6 +70,7 @@ SRC_URI += " \
file://0052-policy-modules-system-setrans-allow-setrans_t-use-fd.patch \
file://0053-policy-modules-system-systemd-make-_systemd_t-MLS-tr.patch \
file://0054-policy-modules-system-logging-make-syslogd_runtime_t.patch \
file://0055-policy-modules-system-authlogin-fix-login-errors-aft.patch \
"
S = "${WORKDIR}/refpolicy"