Product: Piwigo Vendor: Piwigo project Vulnerable Version(s): 2.4.6 and probably prior Tested Version: 2.4.6 Vendor Notification: February 6, 2013 Vendor Patch: February 19, 2013 Public Disclosure: February 27, 2013 Vulnerability Type: Cross-Site Request Forgery [CWE-352], Path Traversal [CWE-22] CVE References: CVE-2013-1468, CVE-2013-1469 Risk Level: High CVSSv2 Base Scores: 7.6 (AV:N/AC:H/Au:N/C:C/I:C/A:C), 4 (AV:N/AC:H/Au:N/C:P/I:N/A:P) Solution Status: Fixed by Vendor Discovered and Provided: High-Tech Bridge Security Research Lab ( https://www.htbridge.com/advisory/ ) ----------------------------------------------------------------------------------------------- Advisory Details: High-Tech Bridge SA Security Research Lab has discovered multiple vulnerabilities in Piwigo, which can be exploited to perform &#1057;ross-Site Request Forgery and Path Traversal attacks. 1) &#1057;ross-Site Request Forgery (CSRF) in Piwigo: CVE-2013-1468 The vulnerability exists due to insufficient verification of the HTTP request origin in "/admin.php" script. A remote attacker can trick a logged-in administrator to visit a specially crafted webpage and create arbitrary PHP file on the remote server. The following PoC (Proof of Concept) code creates a file "file.php" containing "phpinfo();", which can be later accessed via the http://[host]/file.php URL: <form action="http://[host]/admin.php?page=plugin-LocalFilesEditor" method="post" name="f1"> <input type="hidden" name='edited_file' value='file.php'> <input type="hidden" name='text' value=' phpinfo(); '> <input type="hidden" name='submit' value='1'> <input type="submit" id="btn"> </form> <script> document.f1.submit(); </script> Successful exploitation requires that the "LocalFiles Editor" plugin is enabled (disabled by default). 2) Path Traversal in Piwigo: CVE-2013-1469 The vulnerability exists due to insufficient filtration of user-supplied input in "dl" HTTP GET parameter passed to "/install.php" script. The script is present on the system after installation by default, and can be accessed by attacker without any restrictions. The vulnerable code is: if (!empty($_GET['dl']) && file_exists(PHPWG_ROOT_PATH.$conf['data_location'].'pwg_'.$_GET['dl'])) { $filename = PHPWG_ROOT_PATH.$conf['data_location'].'pwg_'.$_GET['dl']; ... echo file_get_contents($filename); ... } However, the vulnerability may be exploited only if PHP 'file_exists' function returns 'true' both for "C:/boot.ini" (or any existing file) and for "C:/any_non_existing_directory/../boot.ini" (in our case the non-existing directory in path is "/pwg_/"). This works in default PHP installation on Windows platform (tested on Windows 7, PHP 5.3.x). In case of successful exploitation remote attacker can read content of arbitrary files on the vulnerable system. Important: after being read the file is deleted (if web server has write permission to it). The following PoC (Proof of Concept) code will display and delete the application's configuration file: http://piwigo/install.php?dl=/../../local/config/database.inc.php ----------------------------------------------------------------------------------------------- Solution: Upgrade to Piwigo 2.4.7 More Information: http://piwigo.org/releases/2.4.7 http://piwigo.org/bugs/view.php?id=0002843 http://piwigo.org/bugs/view.php?id=0002844