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_jailkit_plugin.inc.php | 223 ++++++++++++++++++++++++++++++++-----------------------
1 files changed, 131 insertions(+), 92 deletions(-)
diff --git a/server/plugins-available/shelluser_jailkit_plugin.inc.php b/server/plugins-available/shelluser_jailkit_plugin.inc.php
index 050ec00..322b1ba 100755
--- a/server/plugins-available/shelluser_jailkit_plugin.inc.php
+++ b/server/plugins-available/shelluser_jailkit_plugin.inc.php
@@ -71,6 +71,7 @@
global $app, $conf;
$app->uses('system');
+ $web = $app->db->queryOneRecord("SELECT * FROM web_domain WHERE domain_id = ".$data['new']['parent_domain_id']);
if($app->system->is_user($data['new']['username'])) {
@@ -79,6 +80,8 @@
*/
if ($data['new']['chroot'] == "jailkit")
{
+ $app->system->web_folder_protection($web['document_root'],false);
+
// load the server configuration options
$app->uses("getconf");
$this->data = $data;
@@ -91,13 +94,19 @@
$this->_add_jailkit_user();
- // call the ssh-rsa update function
+ //* call the ssh-rsa update function
$this->_setup_ssh_rsa();
- $command .= 'usermod -U '.escapeshellcmd($data['new']['username']);
+ //$command .= 'usermod -s /usr/sbin/jk_chrootsh -U '.escapeshellcmd($data['new']['username']);
+ //exec($command);
+ $app->system->usermod($data['new']['username'], 0, 0, '', '/usr/sbin/jk_chrootsh', '', '');
+
+ //* Unlock user
+ $command = 'usermod -U '.escapeshellcmd($data['new']['username']);
exec($command);
$this->_update_website_security_level();
+ $app->system->web_folder_protection($web['document_root'],true);
}
$app->log("Jailkit Plugin -> insert username:".$data['new']['username'],LOGLEVEL_DEBUG);
@@ -113,6 +122,7 @@
global $app, $conf;
$app->uses('system');
+ $web = $app->db->queryOneRecord("SELECT * FROM web_domain WHERE domain_id = ".$data['new']['parent_domain_id']);
if($app->system->is_user($data['new']['username'])) {
@@ -121,6 +131,8 @@
*/
if ($data['new']['chroot'] == "jailkit")
{
+ $app->system->web_folder_protection($web['document_root'],false);
+
// load the server configuration options
$app->uses("getconf");
$this->data = $data;
@@ -132,10 +144,12 @@
$this->_setup_jailkit_chroot();
$this->_add_jailkit_user();
- // call the ssh-rsa update function
+ //* call the ssh-rsa update function
$this->_setup_ssh_rsa();
$this->_update_website_security_level();
+
+ $app->system->web_folder_protection($web['document_root'],true);
}
$app->log("Jailkit Plugin -> update username:".$data['new']['username'],LOGLEVEL_DEBUG);
@@ -155,6 +169,8 @@
$app->uses('system');
+ $web = $app->db->queryOneRecord("SELECT * FROM web_domain WHERE domain_id = ".$data['old']['parent_domain_id']);
+
if ($data['old']['chroot'] == "jailkit")
{
$app->uses("getconf");
@@ -165,12 +181,16 @@
//commented out proved to be dangerous on config errors
//exec('rm -rf '.$data['old']['dir'].$jailkit_chroot_userhome);
+ $app->system->web_folder_protection($web['document_root'],false);
+
if(@is_dir($data['old']['dir'].$jailkit_chroot_userhome)) {
- $command = 'userdel';
+ $command = 'userdel -f';
$command .= ' '.escapeshellcmd($data['old']['username']);
exec($command);
$app->log("Jailkit Plugin -> delete chroot home:".$data['old']['dir'].$jailkit_chroot_userhome,LOGLEVEL_DEBUG);
}
+
+ $app->system->web_folder_protection($web['document_root'],true);
}
@@ -245,6 +265,8 @@
function _add_jailkit_user()
{
+ global $app;
+
//add the user to the chroot
$jailkit_chroot_userhome = $this->_get_home_dir($this->data['new']['username']);
$jailkit_chroot_puserhome = $this->_get_home_dir($this->data['new']['puser']);
@@ -264,77 +286,47 @@
$command .= ' '.$this->data['new']['puser'];
$command .= ' '.$jailkit_chroot_puserhome;
exec($command);
+
+ //* Change the homedir of the shell user and parent user
+ //* We have to do this manually as the usermod command fails
+ //* when the user is logged in or a command is running under that user
+ /*
+ $passwd_file_array = file('/etc/passwd');
+ $passwd_out = '';
+ if(is_array($passwd_file_array)) {
+ foreach($passwd_file_array as $line) {
+ $line = trim($line);
+ $parts = explode(':',$line);
+ if($parts[0] == $this->data['new']['username']) {
+ $parts[5] = escapeshellcmd($this->data['new']['dir'].'/.'.$jailkit_chroot_userhome);
+ $parts[6] = escapeshellcmd('/usr/sbin/jk_chrootsh');
+ $new_line = implode(':',$parts);
+ copy('/etc/passwd','/etc/passwd~');
+ chmod('/etc/passwd~',0600);
+ $app->uses('system');
+ $app->system->replaceLine('/etc/passwd',$line,$new_line,1,0);
+ }
+ }
+ }*/
+
+ $app->system->usermod($this->data['new']['username'], 0, 0, $this->data['new']['dir'].'/.'.$jailkit_chroot_userhome, '/usr/sbin/jk_chrootsh');
+ $app->system->usermod($this->data['new']['puser'], 0, 0, $this->data['new']['dir'].'/.'.$jailkit_chroot_userhome, '/usr/sbin/jk_chrootsh');
$this->app->log("Added jailkit user to chroot with command: ".$command,LOGLEVEL_DEBUG);
-
- mkdir(escapeshellcmd($this->data['new']['dir'].$jailkit_chroot_userhome), 0755, true);
+
+ if(!is_dir($this->data['new']['dir'].$jailkit_chroot_userhome)) mkdir(escapeshellcmd($this->data['new']['dir'].$jailkit_chroot_userhome), 0755, true);
chown(escapeshellcmd($this->data['new']['dir'].$jailkit_chroot_userhome), $this->data['new']['username']);
chgrp(escapeshellcmd($this->data['new']['dir'].$jailkit_chroot_userhome), $this->data['new']['pgroup']);
$this->app->log("Added created jailkit user home in : ".$this->data['new']['dir'].$jailkit_chroot_userhome,LOGLEVEL_DEBUG);
- mkdir(escapeshellcmd($this->data['new']['dir'].$jailkit_chroot_puserhome), 0755, true);
+ if(!is_dir($this->data['new']['dir'].$jailkit_chroot_puserhome)) mkdir(escapeshellcmd($this->data['new']['dir'].$jailkit_chroot_puserhome), 0755, true);
chown(escapeshellcmd($this->data['new']['dir'].$jailkit_chroot_puserhome), $this->data['new']['puser']);
chgrp(escapeshellcmd($this->data['new']['dir'].$jailkit_chroot_puserhome), $this->data['new']['pgroup']);
- $this->app->log("Added created jailkit parent user home in : ".$this->data['new']['dir'].$jailkit_chroot_puserhome,LOGLEVEL_DEBUG);
+ $this->app->log("Added jailkit parent user home in : ".$this->data['new']['dir'].$jailkit_chroot_puserhome,LOGLEVEL_DEBUG);
- /*
- // ssh-rsa authentication variables
- $sshrsa = escapeshellcmd($this->data['new']['ssh_rsa']);
- $usrdir = escapeshellcmd($this->data['new']['dir']).'/'.$jailkit_chroot_userhome;
- $sshdir = escapeshellcmd($this->data['new']['dir']).'/'.$jailkit_chroot_userhome.'/.ssh';
- $sshkeys= escapeshellcmd($this->data['new']['dir']).'/'.$jailkit_chroot_userhome.'/.ssh/authorized_keys';
- global $app;
-
- // determine the client id
- $id = $this->data['new']['sys_groupid'];
- if ($id>0) $id = $id -1;
-
- $user = $app->db->queryOneRecord("SELECT * FROM sys_user WHERE client_id = ".$id);
- $userkey = $user['ssh_rsa'];
- $username= $user['username'];
-
- // If this user has no key yet, generate a pair
- if ($userkey == '')
- {
- //Generate ssh-rsa-keys
- exec('ssh-keygen -t rsa -C '.$username.'-rsa-key-'.time().' -f /tmp/id_rsa -N ""');
-
- $privatekey = file_get_contents('/tmp/id_rsa');
- $publickey = file_get_contents('/tmp/id_rsa.pub');
-
- exec('rm -f /tmp/id_rsa /tmp/id_rsa.pub');
-
- // Set the missing keypair
- $app->db->query("UPDATE sys_user SET id_rsa='$privatekey' ,ssh_rsa='$publickey' WHERE client_id = ".$id);
- $userkey = $publickey;
-
- $this->app->log("ssh-rsa keypair generated for ".$username,LOGLEVEL_DEBUG);
-
- };
-
- if (!file_exists($sshkeys))
- {
- // add root's key
- exec("mkdir '$sshdir'");
- exec("cat /root/.ssh/authorized_keys > '$sshkeys'");
- exec("echo '' >> '$sshkeys'");
-
- // add the user's key
- exec("echo '$userkey' >> '$sshkeys'");
- exec("echo '' >> '$sshkeys'");
- }
- // add the custom key
- exec("echo '$sshrsa' >> '$sshkeys'");
- exec("echo '' >> '$sshkeys'");
-
- // set proper file permissions
- exec("chown -R ".escapeshellcmd($this->data['new']['puser']).":".escapeshellcmd($this->data['new']['pgroup'])." ".$usrdir);
- exec("chmod 600 '$sshkeys'");
-
- $this->app->log("ssh-rsa key added to ".$sshkeys,LOGLEVEL_DEBUG);
- */
+
}
//* Update the website root directory permissions depending on the security level
@@ -349,9 +341,12 @@
$web = $app->db->queryOneRecord("SELECT * FROM web_domain WHERE domain_id = ".$this->data['new']['parent_domain_id']);
//* If the security level is set to high
- if($web_config['security_level'] == 20) {
- $this->_exec('chmod 755 '.escapeshellcmd($web["document_root"]));
- $this->_exec('chown root:root '.escapeshellcmd($web["document_root"]));
+ if($web_config['security_level'] == 20 && is_array($web)) {
+ $app->system->web_folder_protection($web["document_root"],false);
+ $app->system->chmod($web["document_root"],0755);
+ $app->system->chown($web["document_root"],'root');
+ $app->system->chgrp($web["document_root"],'root');
+ $app->system->web_folder_protection($web["document_root"],true);
}
}
@@ -364,57 +359,101 @@
}
private function _setup_ssh_rsa() {
+ global $app;
$this->app->log("ssh-rsa setup shelluser_jailkit",LOGLEVEL_DEBUG);
// Get the client ID, username, and the key
- $domain_data = $this->app->dbmaster->queryOneRecord('SELECT sys_groupid FROM web_domain WHERE web_domain.domain_id = '.intval($this->data['new']['parent_domain_id']));
- $sys_group_data = $this->app->dbmaster->queryOneRecord('SELECT * FROM sys_group WHERE sys_group.groupid = '.intval($domain_data['sys_groupid']));
+ $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 = $this->app->dbmaster->queryOneRecord('SELECT * FROM client WHERE client.client_id = '.$id);
+ $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
- $sshrsa = escapeshellcmd($this->data['new']['ssh_rsa']);
+ $sshrsa = $this->data['new']['ssh_rsa'];
$usrdir = escapeshellcmd($this->data['new']['dir']).'/'.$this->_get_home_dir($this->data['new']['username']);
- $sshdir = $usrdir.'/.ssh';
- $sshkeys= $usrdir.'/.ssh/authorized_keys';
+ $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 == '' && $id>0)
- {
+ if ($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
- $this->app->dbmaster->query("UPDATE client SET created_at = ".time().", id_rsa = '".file_get_contents('/tmp/id_rsa')."', ssh_rsa = '".file_get_contents('/tmp/id_rsa.pub')."' WHERE client_id = ".$id);
- // and use the public key that has been generated
- $userkey = file_get_contents('/tmp/id_rsa.pub')
- ;
+ $this->app->db->query("UPDATE client SET created_at = ".time().", id_rsa = '".file_get_contents('/tmp/id_rsa')."', ssh_rsa = '".$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($sshkeys))
- {
+ if (!file_exists($sshkeys)){
// add root's key
- exec("mkdir '$sshdir'");
- exec("cat /root/.ssh/authorized_keys > '$sshkeys'");
- exec("echo '' >> '$sshkeys'");
+ $app->file->mkdirs($sshdir, '0755');
+ 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
- exec("echo '$userkey' >> '$sshkeys'");
- exec("echo '' >> '$sshkeys'");
+ file_put_contents($sshkeys, $final_keys);
+ $app->file->remove_blank_lines($sshkeys);
$this->app->log("ssh-rsa authorisation keyfile created in ".$sshkeys,LOGLEVEL_DEBUG);
}
- if ($sshrsa!=''){
- // add the custom key
- exec("echo '$sshrsa' >> '$sshkeys'");
- exec("echo '' >> '$sshkeys'");
- $this->app->log("ssh-rsa key updated in ".$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'])." ".$usrdir);
+ exec("chown -R ".escapeshellcmd($this->data['new']['puser']).":".escapeshellcmd($this->data['new']['pgroup'])." ".$sshdir);
+ exec("chmod 700 ".$sshdir);
exec("chmod 600 '$sshkeys'");
}
--
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