redaxscript 2.5.0 Code Execution
Posted on 10 December 2015
Security Advisory - Curesec Research Team 1. Introduction Affected Product: redaxscript 2.5.0 Fixed in: module has been removed in version 2.6.0 Fixed Version Link: n/a Vendor Contact: info@redaxmedia.com Vulnerability Type: Code Execution Remote Exploitable: Yes Reported to vendor: 10/02/2015 Disclosed to public: 12/02/2015 Release mode: Coordinated release CVE: n/a Credits Tim Coen of Curesec GmbH 2. Overview CVSS High 9.0 AV:N/AC:L/Au:S/C:C/I:C/A:C Description The module file_manager allows for file uploads, and uses exif_imagetype to check the validity of the file. By setting the first bytes of the uploaded file to that of a valid image type, an attacker can easily bypass this check and thus upload files of dangerous type. It should be noted that only files with the name index.php will be executed, as access to all other PHP files is forbidden by a htaccess file. An account that has access to the module "File manager" is needed to exploit this issue. 3. Code /modules/file_manager/index.php function file_manager_upload($directory = '') { $file = $_FILES['file']['tmp_name']; $file_name = file_manager_clean_file_name($_FILES['file']['name']); $file_size = $_FILES['file']['size']; /* validate post */ if (function_exists('exif_imagetype')) { if (exif_imagetype($file) == '') { $error = l('file_type_limit', '_file_manager') . l('point'); } } 4. Solution To mitigate this issue please remove the file_manager module. 5. Report Timeline 10/02/2015 Informed Vendor about Issue 11/15/2015 Vendor removes affected module 12/02/2015 Disclosed to public Blog Reference: https://blog.curesec.com/article/blog/redaxscript-250-Code-Execution-116.html -- blog: https://blog.curesec.com tweet: https://twitter.com/curesec Curesec GmbH Curesec Research Team Romain-Rolland-Str 14-24 13089 Berlin, Germany
