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[174.29.210.254]) by smtp.gmail.com with ESMTPSA id 8926c6da1cb9f-5a8a9797c36sm4970304173.56.2025.10.22.07.31.48 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 22 Oct 2025 07:31:48 -0700 (PDT) Message-ID: <5f688205-ae84-4a9d-87ec-291846f2c032@gmail.com> Date: Wed, 22 Oct 2025 08:31:48 -0600 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Content-Language: en-US To: Yi Zhao , joe.macdonald@siemens.com, yocto-patches@lists.yoctoproject.org From: Clayton Casciato Subject: [meta-selinux][scarthgap][PATCH] refpolicy: ssh - allow sshd_t userdomain:key search List-Id: X-Webhook-Received: from li982-79.members.linode.com [45.33.32.79] by aws-us-west-2-korg-lkml-1.web.codeaurora.org with HTTPS for ; Wed, 22 Oct 2025 14:31:56 -0000 X-Groupsio-URL: https://lists.yoctoproject.org/g/yocto-patches/message/2382 Signed-off-by: Clayton Casciato --- ...ervices-ssh-allow-sshd_t-userdomain-.patch | 80 +++++++++++++++++++ .../refpolicy/refpolicy_common.inc | 1 + 2 files changed, 81 insertions(+) create mode 100644 recipes-security/refpolicy/refpolicy/0074-policy-modules-services-ssh-allow-sshd_t-userdomain-.patch diff --git a/recipes-security/refpolicy/refpolicy/0074-policy-modules-services-ssh-allow-sshd_t-userdomain-.patch b/recipes-security/refpolicy/refpolicy/0074-policy-modules-services-ssh-allow-sshd_t-userdomain-.patch new file mode 100644 index 0000000..43434c4 --- /dev/null +++ b/recipes-security/refpolicy/refpolicy/0074-policy-modules-services-ssh-allow-sshd_t-userdomain-.patch @@ -0,0 +1,80 @@ +From 965e1c66c8c3bd5087a5f8d276a57974d0378855 Mon Sep 17 00:00:00 2001 +From: Clayton Casciato +Date: Mon, 7 Jul 2025 16:38:49 -0600 +Subject: [PATCH] ssh: allow sshd_t userdomain:key search + +~# grep key /etc/pam.d/sshd +session optional pam_keyinit.so force revoke + +-- + +type=PROCTITLE proctitle=sshd: user123 [priv] + +type=SYSCALL arch=armeb syscall=keyctl per=PER_LINUX success=no +exit=ENOKEY(Required key not available) a0=0x8 a1=0xfffffffc +a2=0xfffffffd a3=0x3e8 items=0 ppid=1 pid=557 auid=unset uid=user123 +gid=user123 euid=root suid=root fsuid=root egid=root sgid=root fsgid=root +tty=(none) ses=unset comm=sshd exe=/usr/sbin/sshd +subj=system_u:system_r:sshd_t:s0 key=(null) + +type=AVC avc: denied { search } for pid=557 comm=sshd +scontext=system_u:system_r:sshd_t:s0 +tcontext=unconfined_u:unconfined_r:unconfined_t:s0 tclass=key + +-- + +Fedora: +$ sesearch -A --source sshd_t --target unconfined_t --class key --perm search +allow domain domain:key { link search }; + +Signed-off-by: Clayton Casciato + +Upstream-Status: Backport [https://github.com/SELinuxProject/refpolicy/commit/c4a2989845ef3fedc4036041ed1fa61c28594842] + +Signed-off-by: Clayton Casciato +--- + policy/modules/services/ssh.if | 1 + + policy/modules/system/userdomain.if | 18 ++++++++++++++++++ + 2 files changed, 19 insertions(+) + +diff --git a/policy/modules/services/ssh.if b/policy/modules/services/ssh.if +index b3394bd92..4935d2e9d 100644 +--- a/policy/modules/services/ssh.if ++++ b/policy/modules/services/ssh.if +@@ -254,6 +254,7 @@ template(`ssh_server_template', ` + + miscfiles_read_localization($1_t) + ++ userdom_search_all_users_keys($1_t) + userdom_create_all_users_keys($1_t) + userdom_dontaudit_relabelfrom_user_ptys($1_t) + userdom_search_user_home_dirs($1_t) +diff --git a/policy/modules/system/userdomain.if b/policy/modules/system/userdomain.if +index ea7a90a5d..3775ee8b5 100644 +--- a/policy/modules/system/userdomain.if ++++ b/policy/modules/system/userdomain.if +@@ -4915,6 +4915,24 @@ interface(`userdom_sigchld_all_users',` + allow $1 userdomain:process sigchld; + ') + ++######################################## ++## ++## Search keys for all user domains. ++## ++## ++## ++## Domain allowed access. ++## ++## ++# ++interface(`userdom_search_all_users_keys',` ++ gen_require(` ++ attribute userdomain; ++ ') ++ ++ allow $1 userdomain:key search; ++') ++ + ######################################## + ## + ## Read keys for all user domains. diff --git a/recipes-security/refpolicy/refpolicy_common.inc b/recipes-security/refpolicy/refpolicy_common.inc index e730cb3..1478721 100644 --- a/recipes-security/refpolicy/refpolicy_common.inc +++ b/recipes-security/refpolicy/refpolicy_common.inc @@ -89,6 +89,7 @@ SRC_URI += " \ file://0071-policy-modules-system-unconfined-allow-firewalld_t-u.patch \ file://0072-policy-modules-services-chronyd-allow-chronyd_t-kern.patch \ file://0073-policy-modules-services-ssh-allow-sshd_t-kernel_t-sy.patch \ + file://0074-policy-modules-services-ssh-allow-sshd_t-userdomain-.patch \ " S = "${WORKDIR}/refpolicy"