Document Title: =============== Alfine CMS v2.6 - (Login) Auth Bypass Vulnerability References (Source): ==================== http://www.vulnerability-lab.com/get_content.php?id=1863 Release Date: ============= 2016-06-27 Vulnerability Laboratory ID (VL-ID): ==================================== 1863 Common Vulnerability Scoring System: ==================================== 8.1 Product & Service Introduction: =============================== ALFiNE IT solutions Ltd was founded in 2004 by a group of entrepreneurs with vast experience in the IT industry. We are multi-skilled software service provider with a highly competent workforce and strong global presence. With years of honed expertise in cross-platform skills and quality-integrated methodologies, ALFiNE adopts a competent global delivery model in providing value-based solutions as well as professional services to clients worldwide. We deliver cost-effective and high quality IT solutions that meet your needs within the specified timelines. (Copy of the Homepage: http://alfinesolutions.com/about.aspx ) Abstract Advisory Information: ============================== An independent vulnerability laboratory researcher discovered an auth bypass in the Alfine Content Management System web-application. Vulnerability Disclosure Timeline: ================================== 2016-06-26: Public Disclosure (Vulnerability Laboratory) Discovery Status: ================= Published Affected Product(s): ==================== Alfine IT Solutions Ltd Product: Alfine CMS - Online Service (Web-Application) 2.6 Exploitation Technique: ======================= Remote Severity Level: =============== High Technical Details & Description: ================================ An auth bypass web vulnerability has been discovered in the official Alfine v2.6 Content Management System. The web vulnerability allows remote attackers to bypass the basic login protection of the web-application. The auth bypass web vulnerability is located in the username and password input fields of the admin index.php login file. Remote attackers are able to inject a classic sql payload to bypass the secure login authentication process. The security risk of the auth bypass vulnerability is estimated as critical with a cvss (common vulnerability scoring system) count of 8.1. Exploitation of the remote auth bypass web vulnerability requires no user interaction or privileged web-application user accounts. Successful exploitation of the remote sql injection results in database management system, web-server and web-application compromise. Request Method(s): [+] POST Vulnerable Module(s): [+] ./admin (Login) Vulnerable File(s): [+] index.php Vulnerable Input(s): [+] Username [+] Password Proof of Concept (PoC): ======================= The auth bypass vulnerability can be exploited by remote attackers without user interaction or privileged web-application user account. For security demonstration or to reproduce the vulnerability follow the provided information and steps below to continue. Vulnerable File: index.php Login: admin/index.php URL: http://localhost:7516/admin/index.php PoC: (Inputs) Username: '=' 'OR' Password: '=' 'OR' Note: Gebruikersnaam(username) and Wachtwoord(Password) Reference(s): http://localhost:7516/admin/index.php Solution - Fix & Patch: ======================= 1. Escape the inputs and use entities 2. Restrict the input fields and disallow the usage of special chars 3. Encode and parse the input of the username and password parameter 4. Use a prepared statement for the login to prevent exploitation Security Risk: ============== The security risk of the remote auth bypass web vulnerability in the Alfine CMS is estimated as high. (CVSS 8.1) Credits & Authors: ================== mr_mask_black - [http://www.vulnerability-lab.com/show.php?user=mr_mask_black] Disclaimer & Information: ========================= The information provided in this advisory is provided as it is without any warranty. Vulnerability Lab disclaims all warranties, either expressed or implied, including the warranties of merchantability and capability for a particular purpose. Vulnerability-Lab or its suppliers are not liable in any case of damage, including direct, indirect, incidental, consequential loss of business profits or special damages, even if Vulnerability-Lab or its suppliers have been advised of the possibility of such damages. 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