Merge remote-tracking branch 'origin/3.5.8' into 3.6.6

docs/en/04_Changelogs/3.5.8.md

@@ -0,0 +1,9 @@
+# 3.5.8
+
+<!--- Changes below this line will be automatically regenerated -->
+
+## Change Log
+
+### Security
+
+ * 2018-04-11 [577138882]() Restrict non-admins from being assigned to admin groups (Damian Mooyman) - See [ss-2018-001](http://www.silverstripe.org/download/security-releases/ss-2018-001)

docs/en/04_Changelogs/rc/3.5.8-rc1.md

@@ -0,0 +1,9 @@
+# 3.5.8-rc1
+
+<!--- Changes below this line will be automatically regenerated -->
+
+## Change Log
+
+### Security
+
+ * 2018-04-11 [577138882]() Restrict non-admins from being assigned to admin groups (Damian Mooyman) - See [ss-2018-001](http://www.silverstripe.org/download/security-releases/ss-2018-001)

security/Member.php

@@ -1050,15 +1050,24 @@ class Member extends DataObject implements TemplateGlobalProvider {
 	 * @return boolean True if the change can be accepted
 	 */
 	public function onChangeGroups($ids) {
-		// unless the current user is an admin already OR the logged in user is an admin
+		// Ensure none of these match disallowed list
-		if(Permission::check('ADMIN') || Permission::checkMember($this, 'ADMIN')) {
+		$disallowedGroupIDs = $this->disallowedGroups();
-			return true;
+		return count(array_intersect($ids, $disallowedGroupIDs)) == 0;
 	}
 
-		// If there are no admin groups in this set then it's ok
+	/**
-		$adminGroups = Permission::get_groups_by_permission('ADMIN');
+	 * List of group IDs this user is disallowed from
-		$adminGroupIDs = ($adminGroups) ? $adminGroups->column('ID') : array();
+	 *
-		return count(array_intersect($ids, $adminGroupIDs)) == 0;
+	 * @return int[] List of group IDs
+	 */
+	protected function disallowedGroups() {
+		// unless the current user is an admin already OR the logged in user is an admin
+		if (Permission::check('ADMIN') || Permission::checkMember($this, 'ADMIN')) {
+			return array();
+		}
+
+		// Non-admins may not belong to admin groups
+		return Permission::get_groups_by_permission('ADMIN')->column('ID');
 	}
 
 
@@ -1473,8 +1482,14 @@ class Member extends DataObject implements TemplateGlobalProvider {
 			$fields->removeByName('LoggedPasswords');
 
 			if(Permission::check('EDIT_PERMISSIONS')) {
+                // Filter allowed groups
+                $groups = Group::get();
+                $disallowedGroupIDs = $this->disallowedGroups();
+                if ($disallowedGroupIDs) {
+                    $groups = $groups->exclude('ID', $disallowedGroupIDs);
+                }
                 $groupsMap = array();
-				foreach(Group::get() as $group) {
+                foreach ($groups as $group) {
                     // Listboxfield values are escaped, use ASCII char instead of »
                     $groupsMap[$group->ID] = $group->getBreadcrumbs(' > ');
                 }

tests/security/MemberTest.php

@@ -665,6 +665,36 @@ class MemberTest extends FunctionalTest {
 		);
 	}
 
+    /**
+     * Ensure DirectGroups listbox disallows admin-promotion
+     */
+    public function testAllowedGroupsListbox() {
+        /** @var Group $adminGroup */
+        $adminGroup = $this->objFromFixture('Group', 'admingroup');
+        /** @var Member $staffMember */
+        $staffMember = $this->objFromFixture('Member', 'staffmember');
+        /** @var Member $adminMember */
+        $adminMember = $this->objFromFixture('Member', 'admin');
+
+        // Ensure you can see the DirectGroups box
+        $this->logInWithPermission('EDIT_PERMISSIONS');
+
+        // Non-admin member field contains non-admin groups
+        /** @var ListboxField $staffListbox */
+        $staffListbox = $staffMember->getCMSFields()->dataFieldByName('DirectGroups');
+        $this->assertArrayNotHasKey($adminGroup->ID, $staffListbox->getSource());
+
+        // admin member field contains admin group
+        /** @var ListboxField $adminListbox */
+        $adminListbox = $adminMember->getCMSFields()->dataFieldByName('DirectGroups');
+        $this->assertArrayHasKey($adminGroup->ID, $adminListbox->getSource());
+
+        // If logged in as admin, staff listbox has admin group
+        $this->logInWithPermission('ADMIN');
+        $staffListbox = $staffMember->getCMSFields()->dataFieldByName('DirectGroups');
+        $this->assertArrayHasKey($adminGroup->ID, $staffListbox->getSource());
+    }
+
 	/**
 	 * Test Member_GroupSet::add
 	 */