From: Oguz Bektas <o.bektas@proxmox.com>
To: pve-devel@lists.proxmox.com
Subject: [pve-devel] [PATCH v4 access-control 05/18] api: allow superusers to edit tfa and password settings
Date: Thu, 2 Jun 2022 09:24:37 +0200 [thread overview]
Message-ID: <20220602072450.55209-6-o.bektas@proxmox.com> (raw)
In-Reply-To: <20220602072450.55209-1-o.bektas@proxmox.com>
- prevent non-SU to change SU passwords
- warning messages on raise_perm_exc()
- log who did the password change
- has_superuser_anywhere helper
Suggested-by: Fabian Grünbichler <f.gruenbichler@proxmox.com>
Signed-off-by: Oguz Bektas <o.bektas@proxmox.com>
---
src/PVE/API2/AccessControl.pm | 24 ++++++++++++++----------
src/PVE/API2/TFA.pm | 16 +++++++++++++++-
src/PVE/RPCEnvironment.pm | 15 +++++++++++++++
3 files changed, 44 insertions(+), 11 deletions(-)
diff --git a/src/PVE/API2/AccessControl.pm b/src/PVE/API2/AccessControl.pm
index 5d78c6f..2a584ab 100644
--- a/src/PVE/API2/AccessControl.pm
+++ b/src/PVE/API2/AccessControl.pm
@@ -378,23 +378,27 @@ __PACKAGE__->register_method ({
$rpcenv->check_user_exist($userid);
+ my $is_superuser = $rpcenv->check($authuser, "/access", ['SuperUser'], 1);
+
if ($authuser eq 'root@pam') {
# OK - root can change anything
- } else {
- if ($authuser eq $userid) {
- $rpcenv->check_user_enabled($userid);
- # OK - each user can change its own password
- } else {
- # only root may change root password
- raise_perm_exc() if $userid eq 'root@pam';
- # do not allow to change system user passwords
- raise_perm_exc() if $realm eq 'pam';
+ } elsif ($authuser eq $userid) {
+ $rpcenv->check_user_enabled($userid);
+ # OK - each user can change its own password
+ } else { # changing someone else's password
+ raise_perm_exc("only root\@pam may change their password!\n") if $userid eq 'root@pam';
+ raise_perm_exc("changing system user passwords is not allowed!\n") if $realm eq 'pam';
+
+ if (!$is_superuser) {
+ # check if the target user has SU privileges
+ raise_perm_exc("only superusers can change another superuser's password!\n")
+ if $rpcenv->has_superuser_anywhere($userid);
}
}
PVE::AccessControl::domain_set_password($realm, $ruid, $param->{password});
- PVE::Cluster::log_msg('info', 'root@pam', "changed password for user '$userid'");
+ PVE::Cluster::log_msg('info', "$authuser", "changed password for user '$userid'");
return undef;
}});
diff --git a/src/PVE/API2/TFA.pm b/src/PVE/API2/TFA.pm
index bee4dee..c1cdd5e 100644
--- a/src/PVE/API2/TFA.pm
+++ b/src/PVE/API2/TFA.pm
@@ -96,22 +96,36 @@ my $TFA_UPDATE_INFO_SCHEMA = {
};
# Only root may modify root, regular users need to specify their password.
+# Only users with SU on /access may modify other users with SU anywhere
#
# Returns the userid returned from `verify_username`.
# Or ($userid, $realm) in list context.
my sub root_permission_check : prototype($$$$) {
my ($rpcenv, $authuser, $userid, $password) = @_;
+ # authuser = the user making the change
+ # userid = the user to be changed
+
+ if ($userid eq 'root@pam') {
+ raise_perm_exc("only root\@pam may edit themselves!\n")
+ if $authuser ne 'root@pam';
+ }
+
($userid, undef, my $realm) = PVE::AccessControl::verify_username($userid);
$rpcenv->check_user_exist($userid);
- raise_perm_exc() if $userid eq 'root@pam' && $authuser ne 'root@pam';
+ my $is_superuser = $rpcenv->check($authuser, "/access", ['SuperUser'], 1);
# Regular users need to confirm their password to change TFA settings.
if ($authuser ne 'root@pam') {
raise_param_exc({ 'password' => 'password is required to modify TFA data' })
if !defined($password);
+ if (!$is_superuser && $authuser ne $userid) {
+ raise_perm_exc("only superusers can change another superuser's TFA settings!\n")
+ if $rpcenv->has_superuser_anywhere($userid);
+ }
+
($authuser, my $auth_username, my $auth_realm) =
PVE::AccessControl::verify_username($authuser);
diff --git a/src/PVE/RPCEnvironment.pm b/src/PVE/RPCEnvironment.pm
index 4c55b25..5bcb4ba 100644
--- a/src/PVE/RPCEnvironment.pm
+++ b/src/PVE/RPCEnvironment.pm
@@ -479,6 +479,21 @@ sub check_api2_permissions {
raise_perm_exc();
}
+sub has_superuser_anywhere {
+ my ($self, $username) = @_;
+
+ return 1 if $username eq 'root@pam';
+
+ # get all ACL paths from config and check for SU privilege
+ my $acls = $self->{user_cfg}->{acl};
+ my @acl_paths = keys(%$acls);
+ @acl_paths = ['/'] if !@acl_paths;
+ foreach my $path (@acl_paths) {
+ return 1 if $self->check($username, $path, ['SuperUser'], 1);
+ }
+ return 0;
+}
+
sub log_cluster_msg {
my ($self, $pri, $user, $msg) = @_;
--
2.30.2
next prev parent reply other threads:[~2022-06-02 7:25 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-06-02 7:24 [pve-devel] [PATCH v4 access-control++ 00/18] SuperUser privilege Oguz Bektas
2022-06-02 7:24 ` [pve-devel] [PATCH v4 access-control 01/18] add "SuperAdministrator" role with the new "SuperUser" privilege Oguz Bektas
2022-06-02 7:24 ` [pve-devel] [PATCH v4 access-control 02/18] RPC env: add SuperUser API permission for GUI capabilities Oguz Bektas
2022-06-02 7:24 ` [pve-devel] [PATCH v4 access-control 03/18] api: acl: only allow granting SU privilege if user already has it Oguz Bektas
[not found] ` <<20220602072450.55209-4-o.bektas@proxmox.com>
2022-07-27 9:06 ` Fabian Grünbichler
2022-06-02 7:24 ` [pve-devel] [PATCH v4 access-control 04/18] api: roles: only allow modifying roles to add/remove SU if user has SU themselves Oguz Bektas
2022-06-02 7:24 ` Oguz Bektas [this message]
[not found] ` <<20220602072450.55209-6-o.bektas@proxmox.com>
2022-07-27 9:06 ` [pve-devel] [PATCH v4 access-control 05/18] api: allow superusers to edit tfa and password settings Fabian Grünbichler
2022-06-02 7:24 ` [pve-devel] [PATCH v4 qemu-server 06/18] api: allow SU privileged users to edit root-only options for VM configs Oguz Bektas
[not found] ` <<20220602072450.55209-7-o.bektas@proxmox.com>
2022-07-27 9:06 ` Fabian Grünbichler
2022-06-02 7:24 ` [pve-devel] [PATCH v4 qemu-server 07/18] migration tests: mock $rpcenv->check subroutine Oguz Bektas
2022-06-02 7:24 ` [pve-devel] [PATCH v4 qemu-server 08/18] api: allow superusers to use 'skiplock' option Oguz Bektas
[not found] ` <<20220602072450.55209-9-o.bektas@proxmox.com>
2022-07-27 9:07 ` Fabian Grünbichler
2022-06-02 7:24 ` [pve-devel] [PATCH v4 qemu-server 09/18] parse_backup_hints: add comment for root shortcut and fix typos Oguz Bektas
2022-06-02 7:24 ` [pve-devel] [PATCH v4 manager 10/18] api: backup: allow SUs to use 'tmpdir', 'dumpdir' and 'script' options Oguz Bektas
2022-06-02 7:24 ` [pve-devel] [PATCH v4 manager 11/18] api: vzdump: allow SUs to use 'bwlimit' and 'ionice' parameters Oguz Bektas
2022-06-02 7:24 ` [pve-devel] [PATCH v4 manager 12/18] api: always drop to login prompt for non-root users on terminal proxy calls Oguz Bektas
2022-06-02 7:24 ` [pve-devel] [PATCH v4 manager 13/18] ui: include "SuperUser" in privilege selector Oguz Bektas
2022-06-02 7:24 ` [pve-devel] [PATCH v4 manager 14/18] ui: lxc features: check for SU instead of 'root@pam' Oguz Bektas
2022-06-02 7:24 ` [pve-devel] [PATCH v4 manager 15/18] ui: adapt sensible 'root@pam' checks to SU Oguz Bektas
[not found] ` <<20220602072450.55209-16-o.bektas@proxmox.com>
2022-07-27 9:07 ` Fabian Grünbichler
2022-06-02 7:24 ` [pve-devel] [PATCH v4 container 16/18] fix #2582: api: add checks for 'SuperUser' privilege for root-only options Oguz Bektas
2022-06-02 7:24 ` [pve-devel] [PATCH v4 storage 17/18] check_volume_access: allow superusers to pass arbitrary fs paths Oguz Bektas
2022-06-02 7:24 ` [pve-devel] [PATCH v4 docs 18/18] pveum: add SU privilege and SA role Oguz Bektas
[not found] ` <<20220602072450.55209-19-o.bektas@proxmox.com>
2022-07-27 9:08 ` Fabian Grünbichler
[not found] ` <<20220602072450.55209-1-o.bektas@proxmox.com>
2022-07-27 9:10 ` [pve-devel] [PATCH v4 access-control++ 00/18] SuperUser privilege Fabian Grünbichler
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