From 835c5d271fd3a8863f774737dca36c463578a719 Mon Sep 17 00:00:00 2001
From: tbrehm <t.brehm@ispconfig.org>
Date: Wed, 04 Apr 2012 03:10:31 -0400
Subject: [PATCH] Extended path checks for webdav users in apache plugin.
---
server/plugins-available/apache2_plugin.inc.php | 27 ++++++++++++++++++++-------
1 files changed, 20 insertions(+), 7 deletions(-)
diff --git a/server/plugins-available/apache2_plugin.inc.php b/server/plugins-available/apache2_plugin.inc.php
index c885f70..9724317 100644
--- a/server/plugins-available/apache2_plugin.inc.php
+++ b/server/plugins-available/apache2_plugin.inc.php
@@ -1576,6 +1576,7 @@
$domain = $sitedata['domain'];
$user = $sitedata['system_user'];
$group = $sitedata['system_group'];
+ $webdav_user_dir = $documentRoot . '/webdav/' . $data['new']['dir'];
/* Check if this is a chrooted setup */
if($web_config['website_basedir'] != '' && @is_file($web_config['website_basedir'].'/etc/passwd')) {
@@ -1584,13 +1585,25 @@
} else {
$apache_chrooted = false;
}
+
+ //* We dont want to have relative paths here
+ if(stristr($webdav_user_dir,'..') || stristr($webdav_user_dir,'./')) {
+ $app->log('Folder path '.$webdav_user_dir.' contains ./ or .. '.$documentRoot,LOGLEVEL_WARN);
+ return false;
+ }
+
+ //* Check if the resulting path exists if yes, if it is inside the docroot
+ if(is_dir($webdav_user_dir) && substr(realpath($webdav_user_dir),0,strlen($documentRoot)) != $documentRoot) {
+ $app->log('Folder path '.$webdav_user_dir.' is outside of docroot '.$documentRoot,LOGLEVEL_WARN);
+ return false;
+ }
/*
* First the webdav-root - folder has to exist
*/
- if(!is_dir($documentRoot . '/webdav/' . $data['new']['dir'])) {
- $app->log('Webdav User directory '.$documentRoot.'/webdav/'.$data['new']['dir'].' does not exist. Creating it now.',LOGLEVEL_DEBUG);
- exec('mkdir -p '.escapeshellcmd($documentRoot . '/webdav/' . $data['new']['dir']));
+ if(!is_dir($webdav_user_dir)) {
+ $app->log('Webdav User directory '.$webdav_user_dir.' does not exist. Creating it now.',LOGLEVEL_DEBUG);
+ exec('mkdir -p '.escapeshellcmd($webdav_user_dir));
}
/*
@@ -1603,19 +1616,19 @@
* The webdav folder (not the webdav-root!) needs the same (not in ONE step, because the
* pwd-files are owned by root)
*/
- $this->_exec('chown ' . $user . ':' . $group . ' ' . escapeshellcmd($documentRoot . '/webdav/'. $data['new']['dir'] . ' -R'));
- $this->_exec('chmod 770 ' . escapeshellcmd($documentRoot . '/webdav/' . $data['new']['dir'] . ' -R'));
+ $this->_exec('chown ' . $user . ':' . $group . ' ' . escapeshellcmd($webdav_user_dir.' -R'));
+ $this->_exec('chmod 770 ' . escapeshellcmd($webdav_user_dir.' -R'));
/*
* if the user is active, we have to write/update the password - file
* if the user is inactive, we have to inactivate the user by removing the user from the file
*/
if ($data['new']['active'] == 'y') {
- $this->_writeHtDigestFile( $documentRoot . '/webdav/' . $data['new']['dir'] . '.htdigest', $data['new']['username'], $data['new']['dir'], $data['new']['password']);
+ $this->_writeHtDigestFile( $webdav_user_dir . '.htdigest', $data['new']['username'], $data['new']['dir'], $data['new']['password']);
}
else {
/* empty pwd removes the user! */
- $this->_writeHtDigestFile( $documentRoot . '/webdav/' . $data['new']['dir'] . '.htdigest', $data['new']['username'], $data['new']['dir'], '');
+ $this->_writeHtDigestFile( $webdav_user_dir . '.htdigest', $data['new']['username'], $data['new']['dir'], '');
}
/*
--
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