HTB23183: User Identity Spoofing in Bitrix Site Manager

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    • #8631

      Advisory ID: HTB23183
      Product: Bitrix Site Manager
      Vendor: Bitrix, Inc
      Vulnerable Versions: 12.5.13 and probably prior
      Tested Version: 12.5.13
      Advisory Publication: November 6, 2013 [without technical details]
      Vendor Notification: November 6, 2013
      Vendor Fix: November 12, 2013
      Public Disclosure: December 11, 2013
      Latest Update: December 10, 2013
      Vulnerability Type: Insufficient Verification of Data Authenticity [CWE-345]
      CVE Reference: CVE-2013-6788
      Risk Level: Medium
      CVSSv2 Base Score: 6.8 (AV:N/AC:M/Au:N/C:P/I:P/A:P)
      Solution Status: Fixed by Vendor
      Discovered and Provided: High-Tech Bridge Security Research Lab

      Advisory Details:
      High-Tech Bridge Security Research Lab discovered vulnerability in Bitrix Site Manager, which can be exploited to spoof user’s identity and read, modify or delete pre-ordered items in customer’s basket.

      1) User Identity Spoofing in Bitrix Site Manager: CVE-2013-6788
      The vulnerability exists due to insufficient verification of supplied data authenticity when displaying pre-order items in customer’s basket in the e-Store Module of Bitrix Site Manager. A remote unauthenticated user can change “BITRIX_SM_SALE_UID” cookie, view another user’s basket and perform certain actions, e.g. add or delete items in the basket. The e-Store Module must be installed on the system and knowledge of a valid “BITRIX_SM_SALE_UID” cookie is required. This value can be easily guessed using simple brute-force techniques, since the application increases its value by 1 with every new customer.
      Below are exploitation instructions for this vulnerability. You will need to open two different browsers with plugins that allow cookie management.
      1. Open your first browser
      2. Visit the following URL http://[host]/buy/cms.php and add items to the basket.
      3. You will be redirected to the following URL: http://[host]/personal/cart.php
      4. Record your “BITRIX_SM_SALE_UID” cookie value.
      5. Open your second browser and navigate to the following URL: http://[host]/personal/cart.php
      6. Change the value of your “BITRIX_SM_SALE_UID” cookie to the one you recorded before and delete all other cookies.
      7. Refresh the page http://[host]/personal/cart.php. You will see pre-ordered items of another user.

      Update “sale” module to version 14.0.1

      More Information:

      [1] High-Tech Bridge Advisory HTB23183 – User Identity Spoofing in Bitrix Site Manager
      [2] Bitrix Site Manager – With over 60,000 installations and #3 rating in the list of the most popular commercial CMS worldwide, the software is an ultimate choice for corporate portals, online stores, community sites and news services.
      [3] Common Vulnerabilities and Exposures (CVE) – – international in scope and free for public use, CVE® is a dictionary of publicly known information security vulnerabilities and exposures.
      [4] Common Weakness Enumeration (CWE) – – targeted to developers and security practitioners, CWE is a formal list of software weakness types.
      [5] ImmuniWeb® – is High-Tech Bridge’s proprietary web application security assessment solution with SaaS delivery model that combines manual and automated vulnerability testing.

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