From d87f76019fc231ec20d95126a7fee0487e7be5f0 Mon Sep 17 00:00:00 2001
From: tbrehm <t.brehm@ispconfig.org>
Date: Tue, 14 Aug 2012 10:56:20 -0400
Subject: [PATCH] - Added new web folder named private to web folder layout. The folder is intended to store data that shall not be visible in the web directory, it is owned by the user of the web. - Changed ownership of web root directory to root user in all security modes to prevent symlink attacks. - Apache log files are now owned by user root. - Improved functions in system library.
---
server/plugins-available/shelluser_base_plugin.inc.php | 496 ++++++++++++++++++++++++++++++++++++-------------------
1 files changed, 325 insertions(+), 171 deletions(-)
diff --git a/server/plugins-available/shelluser_base_plugin.inc.php b/server/plugins-available/shelluser_base_plugin.inc.php
index 25b3f0a..d63b6b2 100755
--- a/server/plugins-available/shelluser_base_plugin.inc.php
+++ b/server/plugins-available/shelluser_base_plugin.inc.php
@@ -1,171 +1,325 @@
-<?php
-
-/*
-Copyright (c) 2007, Till Brehm, projektfarm Gmbh
-All rights reserved.
-
-Redistribution and use in source and binary forms, with or without modification,
-are permitted provided that the following conditions are met:
-
- * Redistributions of source code must retain the above copyright notice,
- this list of conditions and the following disclaimer.
- * Redistributions in binary form must reproduce the above copyright notice,
- this list of conditions and the following disclaimer in the documentation
- and/or other materials provided with the distribution.
- * Neither the name of ISPConfig nor the names of its contributors
- may be used to endorse or promote products derived from this software without
- specific prior written permission.
-
-THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
-ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
-WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
-IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
-INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
-BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
-OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
-NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
-EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-*/
-
-class shelluser_base_plugin {
-
- var $plugin_name = 'shelluser_base_plugin';
- var $class_name = 'shelluser_base_plugin';
- var $min_uid = 499;
-
- //* This function is called during ispconfig installation to determine
- // if a symlink shall be created for this plugin.
- function onInstall() {
- global $conf;
-
- if($conf['services']['web'] == true) {
- return true;
- } else {
- return false;
- }
-
- }
-
-
- /*
- This function is called when the plugin is loaded
- */
-
- function onLoad() {
- global $app;
-
- /*
- Register for the events
- */
-
- $app->plugins->registerEvent('shell_user_insert',$this->plugin_name,'insert');
- $app->plugins->registerEvent('shell_user_update',$this->plugin_name,'update');
- $app->plugins->registerEvent('shell_user_delete',$this->plugin_name,'delete');
-
-
- }
-
-
- function insert($event_name,$data) {
- global $app, $conf;
-
- $app->uses('system');
-
- if($app->system->is_user($data['new']['puser'])) {
- // Get the UID of the parent user
- $uid = intval($app->system->getuid($data['new']['puser']));
- if($uid > $this->min_uid) {
- $command = 'useradd';
- $command .= ' --home '.escapeshellcmd($data['new']['dir']);
- $command .= ' --gid '.escapeshellcmd($data['new']['pgroup']);
- $command .= ' --non-unique ';
- $command .= ' --password '.escapeshellcmd($data['new']['password']);
- $command .= ' --shell '.escapeshellcmd($data['new']['shell']);
- $command .= ' --uid '.escapeshellcmd($uid);
- $command .= ' '.escapeshellcmd($data['new']['username']);
-
- exec($command);
- $app->log("Added shelluser: ".$data['new']['username'],LOGLEVEL_DEBUG);
-
- //* Disable shell user temporarily if we use jailkit
- if($data['new']['chroot'] == 'jailkit') {
- $command = 'usermod -L '.escapeshellcmd($data['new']['username']);
- exec($command);
- $app->log("Disabling shelluser temporarily: ".$command,LOGLEVEL_DEBUG);
- }
-
- } else {
- $app->log("UID = $uid for shelluser:".$data['new']['username']." not allowed.",LOGLEVEL_ERROR);
- }
- } else {
- $app->log("Skippung insert of user:".$data['new']['username'].", parent user ".$data['new']['puser']." does not exist.",LOGLEVEL_WARN);
- }
- }
-
- function update($event_name,$data) {
- global $app, $conf;
-
- $app->uses('system');
-
- if($app->system->is_user($data['new']['puser'])) {
- // Get the UID of the parent user
- $uid = intval($app->system->getuid($data['new']['puser']));
- if($uid > $this->min_uid) {
- // Check if the user that we want to update exists, if not, we insert it
- if($app->system->is_user($data['old']['username'])) {
- $command = 'usermod';
- $command .= ' --home '.escapeshellcmd($data['new']['dir']);
- $command .= ' --gid '.escapeshellcmd($data['new']['pgroup']);
- // $command .= ' --non-unique ';
- $command .= ' --password '.escapeshellcmd($data['new']['password']);
- if($data['new']['chroot'] != 'jailkit') $command .= ' --shell '.escapeshellcmd($data['new']['shell']);
- // $command .= ' --uid '.escapeshellcmd($uid);
- $command .= ' --login '.escapeshellcmd($data['new']['username']);
- $command .= ' '.escapeshellcmd($data['old']['username']);
-
- exec($command);
- // $app->log("Updated shelluser: $command ",LOGLEVEL_DEBUG);
- $app->log("Updated shelluser: ".$data['old']['username'],LOGLEVEL_DEBUG);
- } else {
- // The user does not exist, so we insert it now
- $this->insert($event_name,$data);
- }
- } else {
- $app->log("UID = $uid for shelluser:".$data['new']['username']." not allowed.",LOGLEVEL_ERROR);
- }
- } else {
- $app->log("Skippung update for user:".$data['new']['username'].", parent user ".$data['new']['puser']." does not exist.",LOGLEVEL_WARN);
- }
- }
-
- function delete($event_name,$data) {
- global $app, $conf;
-
- $app->uses('system');
-
- if($app->system->is_user($data['old']['username'])) {
- // Get the UID of the user
- $userid = intval($app->system->getuid($data['old']['username']));
- if($userid > $this->min_uid) {
- $command = 'userdel -f';
- $command .= ' '.escapeshellcmd($data['old']['username']);
-
- exec($command);
- $app->log("Deleted shelluser: ".$data['old']['username'],LOGLEVEL_DEBUG);
-
- } else {
- $app->log("UID = $userid for shelluser:".$data['old']['username']." not allowed.",LOGLEVEL_ERROR);
- }
- } else {
- $app->log("User:".$data['new']['username']." does not exist in in /etc/passwd, skipping delete.",LOGLEVEL_WARN);
- }
-
- }
-
-
-
-
-} // end class
-
-?>
\ No newline at end of file
+<?php
+
+/*
+Copyright (c) 2007, Till Brehm, projektfarm Gmbh
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without modification,
+are permitted provided that the following conditions are met:
+
+ * Redistributions of source code must retain the above copyright notice,
+ this list of conditions and the following disclaimer.
+ * Redistributions in binary form must reproduce the above copyright notice,
+ this list of conditions and the following disclaimer in the documentation
+ and/or other materials provided with the distribution.
+ * Neither the name of ISPConfig nor the names of its contributors
+ may be used to endorse or promote products derived from this software without
+ specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
+INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
+OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
+EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+
+class shelluser_base_plugin {
+
+ var $plugin_name = 'shelluser_base_plugin';
+ var $class_name = 'shelluser_base_plugin';
+ var $min_uid = 499;
+
+ //* This function is called during ispconfig installation to determine
+ // if a symlink shall be created for this plugin.
+ function onInstall() {
+ global $conf;
+
+ if($conf['services']['web'] == true) {
+ return true;
+ } else {
+ return false;
+ }
+
+ }
+
+
+ /*
+ This function is called when the plugin is loaded
+ */
+
+ function onLoad() {
+ global $app;
+
+ /*
+ Register for the events
+ */
+
+ $app->plugins->registerEvent('shell_user_insert',$this->plugin_name,'insert');
+ $app->plugins->registerEvent('shell_user_update',$this->plugin_name,'update');
+ $app->plugins->registerEvent('shell_user_delete',$this->plugin_name,'delete');
+
+
+ }
+
+
+ function insert($event_name,$data) {
+ global $app, $conf;
+
+ $app->uses('system');
+
+ //* Check if the resulting path is inside the docroot
+ $web = $app->db->queryOneRecord("SELECT * FROM web_domain WHERE domain_id = ".intval($data['new']['parent_domain_id']));
+ if(substr(realpath($data['new']['dir']),0,strlen($web['document_root'])) != $web['document_root']) {
+ $app->log('Directory of the shell user is outside of website docroot.',LOGLEVEL_WARN);
+ return false;
+ }
+
+ if($app->system->is_user($data['new']['puser'])) {
+
+ //* Remove webfolder protection
+ $app->system->web_folder_protection($web['document_root'],false);
+
+ // Get the UID of the parent user
+ $uid = intval($app->system->getuid($data['new']['puser']));
+ if($uid > $this->min_uid) {
+ $command = 'useradd';
+ $command .= ' -d '.escapeshellcmd($data['new']['dir']);
+ $command .= ' -g '.escapeshellcmd($data['new']['pgroup']);
+ $command .= ' -o '; // non unique
+ if($data['new']['password'] != '') $command .= ' -p '.escapeshellcmd($data['new']['password']);
+ $command .= ' -s '.escapeshellcmd($data['new']['shell']);
+ $command .= ' -u '.escapeshellcmd($uid);
+ $command .= ' '.escapeshellcmd($data['new']['username']);
+
+ exec($command);
+ $app->log("Executed command: ".$command,LOGLEVEL_DEBUG);
+ $app->log("Added shelluser: ".$data['new']['username'],LOGLEVEL_DEBUG);
+
+ // call the ssh-rsa update function
+ $app->uses("getconf");
+ $this->data = $data;
+ $this->app = $app;
+ $this->_setup_ssh_rsa();
+
+ //* Create .bash_history file
+ touch(escapeshellcmd($data['new']['dir']).'/.bash_history');
+ chmod(escapeshellcmd($data['new']['dir']).'/.bash_history', 0755);
+ chown(escapeshellcmd($data['new']['dir']).'/.bash_history', escapeshellcmd($data['new']['username']));
+ chgrp(escapeshellcmd($data['new']['dir']).'/.bash_history', escapeshellcmd($data['new']['pgroup']));
+
+ //* Disable shell user temporarily if we use jailkit
+ if($data['new']['chroot'] == 'jailkit') {
+ $command = 'usermod -s /bin/false -L '.escapeshellcmd($data['new']['username']);
+ exec($command);
+ $app->log("Disabling shelluser temporarily: ".$command,LOGLEVEL_DEBUG);
+ }
+
+ //* Add webfolder protection again
+ $app->system->web_folder_protection($web['document_root'],true);
+
+ } else {
+ $app->log("UID = $uid for shelluser:".$data['new']['username']." not allowed.",LOGLEVEL_ERROR);
+ }
+ } else {
+ $app->log("Skipping insertion of user:".$data['new']['username'].", parent user ".$data['new']['puser']." does not exist.",LOGLEVEL_WARN);
+ }
+ }
+
+ function update($event_name,$data) {
+ global $app, $conf;
+
+ $app->uses('system');
+
+ //* Check if the resulting path is inside the docroot
+ $web = $app->db->queryOneRecord("SELECT * FROM web_domain WHERE domain_id = ".intval($data['new']['parent_domain_id']));
+ if(substr(realpath($data['new']['dir']),0,strlen($web['document_root'])) != $web['document_root']) {
+ $app->log('Directory of the shell user is outside of website docroot.',LOGLEVEL_WARN);
+ return false;
+ }
+
+ if($app->system->is_user($data['new']['puser'])) {
+ // Get the UID of the parent user
+ $uid = intval($app->system->getuid($data['new']['puser']));
+ if($uid > $this->min_uid) {
+ // Check if the user that we want to update exists, if not, we insert it
+ if($app->system->is_user($data['old']['username'])) {
+ /*
+ $command = 'usermod';
+ $command .= ' --home '.escapeshellcmd($data['new']['dir']);
+ $command .= ' --gid '.escapeshellcmd($data['new']['pgroup']);
+ // $command .= ' --non-unique ';
+ $command .= ' --password '.escapeshellcmd($data['new']['password']);
+ if($data['new']['chroot'] != 'jailkit') $command .= ' --shell '.escapeshellcmd($data['new']['shell']);
+ // $command .= ' --uid '.escapeshellcmd($uid);
+ $command .= ' --login '.escapeshellcmd($data['new']['username']);
+ $command .= ' '.escapeshellcmd($data['old']['username']);
+
+ exec($command);
+ $app->log("Executed command: $command ",LOGLEVEL_DEBUG);
+ */
+ $groupinfo = posix_getgrnam($data['new']['pgroup']);
+ $app->system->usermod($data['old']['username'],0, $groupinfo[gid], $data['new']['dir'], $data['new']['shell'], $data['new']['password'], $data['new']['username']);
+ $app->log("Updated shelluser: ".$data['old']['username'],LOGLEVEL_DEBUG);
+
+ // call the ssh-rsa update function
+ $app->uses("getconf");
+ $this->data = $data;
+ $this->app = $app;
+ $this->_setup_ssh_rsa();
+
+ //* Create .bash_history file
+ if(!is_file($data['new']['dir']).'/.bash_history') {
+ touch(escapeshellcmd($data['new']['dir']).'/.bash_history');
+ chmod(escapeshellcmd($data['new']['dir']).'/.bash_history', 0755);
+ chown(escapeshellcmd($data['new']['dir']).'/.bash_history',escapeshellcmd($data['new']['username']));
+ chgrp(escapeshellcmd($data['new']['dir']).'/.bash_history',escapeshellcmd($data['new']['pgroup']));
+ }
+
+ } else {
+ // The user does not exist, so we insert it now
+ $this->insert($event_name,$data);
+ }
+ } else {
+ $app->log("UID = $uid for shelluser:".$data['new']['username']." not allowed.",LOGLEVEL_ERROR);
+ }
+ } else {
+ $app->log("Skipping update for user:".$data['new']['username'].", parent user ".$data['new']['puser']." does not exist.",LOGLEVEL_WARN);
+ }
+ }
+
+ function delete($event_name,$data) {
+ global $app, $conf;
+
+ $app->uses('system');
+
+ if($app->system->is_user($data['old']['username'])) {
+ // Get the UID of the user
+ $userid = intval($app->system->getuid($data['old']['username']));
+ if($userid > $this->min_uid) {
+ // We delete only non jailkit users, jailkit users will be deleted by the jailkit plugin.
+ if ($data['old']['chroot'] != "jailkit") {
+ $command = 'userdel -f';
+ $command .= ' '.escapeshellcmd($data['old']['username']);
+
+ exec($command);
+ $app->log("Deleted shelluser: ".$data['old']['username'],LOGLEVEL_DEBUG);
+ }
+
+ } else {
+ $app->log("UID = $userid for shelluser:".$data['old']['username']." not allowed.",LOGLEVEL_ERROR);
+ }
+ } else {
+ $app->log("User:".$data['new']['username']." does not exist in in /etc/passwd, skipping delete.",LOGLEVEL_WARN);
+ }
+
+ }
+
+ private function _setup_ssh_rsa() {
+ global $app;
+ $this->app->log("ssh-rsa setup shelluser_base",LOGLEVEL_DEBUG);
+ // Get the client ID, username, and the key
+ $domain_data = $this->app->db->queryOneRecord('SELECT sys_groupid FROM web_domain WHERE web_domain.domain_id = '.intval($this->data['new']['parent_domain_id']));
+ $sys_group_data = $this->app->db->queryOneRecord('SELECT * FROM sys_group WHERE sys_group.groupid = '.intval($domain_data['sys_groupid']));
+ $id = intval($sys_group_data['client_id']);
+ $username= $sys_group_data['name'];
+ $client_data = $this->app->db->queryOneRecord('SELECT * FROM client WHERE client.client_id = '.$id);
+ $userkey = $client_data['ssh_rsa'];
+ unset($domain_data);
+ unset($client_data);
+
+ // ssh-rsa authentication variables
+ $sshrsa = $this->data['new']['ssh_rsa'];
+ $usrdir = escapeshellcmd($this->data['new']['dir']);
+ $sshdir = $usrdir.'/.ssh';
+ $sshkeys= $usrdir.'/.ssh/authorized_keys';
+
+ $app->uses('file');
+ $sshrsa = $app->file->unix_nl($sshrsa);
+ $sshrsa = $app->file->remove_blank_lines($sshrsa,0);
+
+ // If this user has no key yet, generate a pair
+ if ($userkey == '' && $id > 0){
+ //Generate ssh-rsa-keys
+ exec('ssh-keygen -t rsa -C '.$username.'-rsa-key-'.time().' -f /tmp/id_rsa -N ""');
+
+ // use the public key that has been generated
+ $userkey = file_get_contents('/tmp/id_rsa.pub');
+
+ // save keypair in client table
+ $this->app->db->query("UPDATE client SET created_at = ".time().", id_rsa = '".file_get_contents('/tmp/id_rsa')."', ssh_rsa = '".$userkey."' WHERE client_id = ".$id);
+
+ exec('rm -f /tmp/id_rsa /tmp/id_rsa.pub');
+ $this->app->log("ssh-rsa keypair generated for ".$username,LOGLEVEL_DEBUG);
+ };
+
+ if (!file_exists($sshkeys)){
+ // add root's key
+ $app->file->mkdirs($sshdir, '0700');
+ if(is_file('/root/.ssh/authorized_keys')) file_put_contents($sshkeys, file_get_contents('/root/.ssh/authorized_keys'));
+
+ // Remove duplicate keys
+ $existing_keys = @file($sshkeys);
+ $new_keys = explode("\n", $userkey);
+ $final_keys_arr = @array_merge($existing_keys, $new_keys);
+ $new_final_keys_arr = array();
+ if(is_array($final_keys_arr) && !empty($final_keys_arr)){
+ foreach($final_keys_arr as $key => $val){
+ $new_final_keys_arr[$key] = trim($val);
+ }
+ }
+ $final_keys = implode("\n", array_flip(array_flip($new_final_keys_arr)));
+
+ // add the user's key
+ file_put_contents($sshkeys, $final_keys);
+ $app->file->remove_blank_lines($sshkeys);
+ $this->app->log("ssh-rsa authorisation keyfile created in ".$sshkeys,LOGLEVEL_DEBUG);
+ }
+
+ //* Get the keys
+ $existing_keys = file($sshkeys);
+ $new_keys = explode("\n", $sshrsa);
+ $old_keys = explode("\n",$this->data['old']['ssh_rsa']);
+
+ //* Remove all old keys
+ if(is_array($old_keys)) {
+ foreach($old_keys as $key => $val) {
+ $k = array_search(trim($val),$existing_keys);
+ unset($existing_keys[$k]);
+ }
+ }
+
+ //* merge the remaining keys and the ones fom the ispconfig database.
+ if(is_array($new_keys)) {
+ $final_keys_arr = array_merge($existing_keys, $new_keys);
+ } else {
+ $final_keys_arr = $existing_keys;
+ }
+
+ $new_final_keys_arr = array();
+ if(is_array($final_keys_arr) && !empty($final_keys_arr)){
+ foreach($final_keys_arr as $key => $val){
+ $new_final_keys_arr[$key] = trim($val);
+ }
+ }
+ $final_keys = implode("\n", array_flip(array_flip($new_final_keys_arr)));
+
+ // add the custom key
+ file_put_contents($sshkeys, $final_keys);
+ $app->file->remove_blank_lines($sshkeys);
+ $this->app->log("ssh-rsa key updated in ".$sshkeys,LOGLEVEL_DEBUG);
+
+ // set proper file permissions
+ exec("chown -R ".escapeshellcmd($this->data['new']['puser']).":".escapeshellcmd($this->data['new']['pgroup'])." ".$sshdir);
+ exec("chmod 600 '$sshkeys'");
+
+ }
+
+
+} // end class
+
+?>
--
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