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TUCoPS :: Web :: e-commerce, shopping carts :: hack2579.htm

osCommerce SQL Injection && DoS && Cross Site Scripting



osCommerce SQL Injection && DoS && Cross Site Scripting



Vendor  : osCommerce

URL     : http://www.oscommerce.com 

Version : osCommerce 2.2-MS1 / osCommerce 2.2-MS2

Risk    : SQL Injection Vulnerability & XSS in MS1

          And Denial Of Service to users in MS1 & MS2







Description:

osCommerce is an online shop e-commerce solution under on going 

development by the open source community. Its feature packed 

out-of-the-box installation allows store owners to setup, run, and 

maintain their online stores with minimum effort and with absolutely 

no costs or license fees involved. It is used by millions of people

all around the world, and has been implemented into other web apps

such as oscMall and OSC-Nuke.







SQL Injection && Denial Of Service Vulnerability:

osCommerce 2.2 MS1 is vulnerable to SQL Injection vulnerability that can 

allow an attacker to (or have an unsuspecting user) influence SQL Queries and/or 

deny a legitimate user service. By sending a user a malformed URI an attacker 

can effectively deny a user legitimate access to their account. Below is an 

example URI and an explanation of the URI parameters.



/default.php?cPath=[MID]&sort=5a&page=1&action=buy_now&products_id=[PID][JNK]



[MID] = A Valid Manufacturer ID Number

[PID] = A Valid Product ID Number

[JNK] = SQL query or junk. %22 %5C %27 or %00 Will cause a DoS



The Denial of service will cause an unremovable item to be placed in the

users shopping cart. The next time that user logs out and logs back in they

will be greeted with the following SQL error message. If a user is not logged

in they will have an unremovable item until their session is terminated. If

a user is not logged in, is sent the malicious URI, and then logs in they

will have an unremovable item in their cart until the database is manually

altered by an admin. If it is a 2.2 MS1 installation the query will execute.



--[ Begin Error ]---------------------------------------------------------



1064 - You have an error in your SQL syntax. Check the manual that corresponds 

to your MySQL server version for the right syntax to use near '[Problem_Here]' 

and pd.products_id = p.products_id and pd.langu



select p.products_id, pd.products_name, p.products_model, p.products_price, 

p.products_weight, p.products_tax_class_id from products p, products_description 

pd where p.products_id='79'[Problem_Here]' and pd.products_id = p.products_id 

and pd.language_id = '1'



--------------------------------------------------------------------------



I have found NO WAY to have a normally functioning account after this attack 

is executed. Even if you are able to return to your shopping cart page you still 

cannot purchase items or view your shopping cart. Furthermore, an attacker can 

obviously use this flaw to possibly compromise the database, or even worse, 

have some unsuspecting customer run SQL queries for them. While this attack does

not cause the SQL queries to be executed in osCommerce 2.2 MS2, it does allow

for an attacker to execute a Denial Of Service attack on a user by placing an

unremovable item in their shopping cart. Any webmasters experiencing this kind

of attack can delete the malicious values from the "customers_basket" table, but

be aware that will not stop any arbitrary SQL queries from being executed. Queries

are not executed in osCommerce 2.2 MS2 because the addslashes() function is being

used. However, someone out there may be able to figure something out ;)







Cross Site Scripting:

Cross site scripting is present in osCommerce 2.2 MS1 An attacker can exploit

this flaw by passing an invalid request to the Manufacturers ID parameter. An

example of this can be seen below



/default.php?manufacturers_id=">

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