[FD] WebComIndia CMS 2015Q4 - Auth Bypass Vulnerability

Document Title: =============== WebComIndia CMS 2015Q4 - Auth Bypass Vulnerability References (Source): ==================== http://ift.tt/1QYFPLt Release Date: ============= 2015-10-07 Vulnerability Laboratory ID (VL-ID): ==================================== 1614 Common Vulnerability Scoring System: ==================================== 8.3 Product & Service Introduction: =============================== Where quality & reliability converge. Web.Com (India) is an ISO 9001:2008 certified Software company specialising in custom software development, web design and development, mobile app development, SEO and SMO Services in Guwahati, Assam. Deploying the latest technologies, we deliver solutions that offer high levels of consistency in quality and performance. Our technological intelligence spans several platforms, languages and databases. As a leading IT solutions provider, our technical skill set is ever up-to-date, comprising of the latest and the quintessential. (Copy of the Vendor Homepage: http://ift.tt/1xkiUCb ) Abstract Advisory Information: ============================== An independent vulnerability laboratory researcher discovered an auth bypass vulnerability in the official WebComIndia Content Management System (web-application). Vulnerability Disclosure Timeline: ================================== 2015-10-07: Public Disclosure (Vulnerability Laboratory) Discovery Status: ================= Published Affected Product(s): ==================== WebComIndia Ltd Product: WebComIndia.Biz - Content Management System 2015 Q4 Exploitation Technique: ======================= Remote Severity Level: =============== High Technical Details & Description: ================================ An auth bypass web vulnerability has been discovered in the official WebComIndia Content Management System 2015Q4. The vulnerability allows remote attackers to bypass the login mechanism of the web-application to compromise the service. The auth bypass web vulnerability has been discovered in the Username input field of the login module. Remote attackers are able to bypass the mechanism to unauthorized login to the web-application. The vulnerability is located in the code-line on the application-side of the online-service. The request method to inject/execute is POST and the injection point is the Username. The vulnerability is a classic login auth bypass that allows to finally compromise the dbms and web-application at the end. The security risk of the auth bypass vulnerability is estimated as high with a cvss (common vulnerability scoring system) count of 8.3. Exploitation of the login form auth bypass web vulnerability requires no privilege web-application user account or user interaction. Successful exploitation of the vulnerability results in unauthorized access to the admin panel, defacement, web-application and dbms compromise. Request Method(s): [+] POST Vulnerable Module(s) [+] Login Affected Module(s) [+] Account System - (Admin Panel) Vulnerable Parameter(s): [+] Username Proof of Concept (PoC): ======================= The auth bypass vulnerability can be exploited by remote attackers without privilege application user account or user interaction. For security demonstration or to reproduce the vulnerability follow the provided information and steps below to continue. Manual steps to reproduce the vulnerability ... 1. Open the vulnerable website 2. Surf to the admin panel 3. Inject to the Username input the following content `admin'-- -` 4. Include any random value as Password input and save the form to continue 5. Click on Login and you will be able to bypass login Note: The Username input field and request is not sanitized properly 6. Successful reproduce of the remote auth bypass vulnerability! Website: http://[server].com/ Admin Panel: http://[server].com/admin PoC: (Input) Username: admin'-- - Password: purani > Login Bypass successful! Note: The password value can be choosen randomly by the attacker! Solution - Fix & Patch: ======================= The vulnerability can be patched by a secure parse and encode or escape of the Username value input. Restrict the input and disallow special chars. Include an exception that prevents by usage of a prepared statement. Security Risk: ============== The security risk of the auth bypass vulnerability in the Username input field and login request is estimated as high. (CVSS 8.3) Credits & Authors: ================== Aaditya Purani - ( http://ift.tt/1FWaUPI ) [ http://ift.tt/1QdwMGl ] Special Thanks: Hell Shield Hackers | Ahmedabad University | Skysecura Disclaimer & Information: ========================= The information provided in this advisory is provided as it is without any warranty. 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