Applications security: Testing scenarios

Security testing is a crucial part of commissioning an application in your enterprise environment. The IT security team needs to have a robust arsenal of test cases when it comes to application security testing before the actual Go-live.
This is the acid test for the application development team. Ideally you will put the application through two kinds of tests depending on whether it is an internal application or a web facing application. The web facing applications need to go through the pentest as well.
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Security testing for Applications can be done at various stages of the enterprise SDLC namely during the analysis & design phase, development phase and post testing maintenance phase. However, in this blog I will be covering test scenarios specifically undertaken during the “Testing phase”.

Below are the testing scenarios for both internal and web facing public applications:

Security Testing Test Scenarios
1. Check for SQL injection attacks
2. Secure pages should use HTTPS protocol
3. Page crash should not reveal application or server info. Error page should be displayed for this
4. Escape special characters in input
5. Error messages should not reveal any sensitive information
6. All credentials should be transferred over an encrypted channel
7. Test password security and password policy enforcement
8. Check application logout functionality
9. Check for Brute Force Attacks
10. Cookie information should be stored in encrypted format only
11. Check session cookie duration and session termination after timeout or logout
11. Session tokens should be transmitted over secured channel
13. Password should not be stored in cookies
14. Test for Denial of Service attacks
15. Test for memory leakage
16. Test unauthorized application access by manipulating variable values in browser address bar
17. Test file extension handing so that exe files are not uploaded and executed on server
18. Sensitive fields like passwords and credit card information should not have auto complete enabled
19. File upload functionality should use file type restrictions and also anti-virus for scanning uploaded files
20. Check if directory listing is prohibited
21. Password and other sensitive fields should be masked while typing
22. Check if forgot password functionality is secured with features like temporary password expiry after specified hours and security question is asked before changing or requesting new password
23. Verify CAPTCHA functionality
24. Check if important events are logged in log files
25. Check if access privileges are implemented correctly

Penetration Testing Test Scenarios
1) Check if web application is able to identify spam attacks on contact forms used in the website.
2) Proxy server – Check if network traffic is monitored by proxy appliances. Proxy server make it difficult for hackers to get internal details of the network thus protecting the system from external attacks.
3) Spam email filters – Verify if incoming and outgoing email traffic is filtered and unsolicited emails are blocked. Many email clients come with in-build spam filters which needs to be configured as per your needs. These configuration rules can be applied on email headers, subject or body.
4) Firewall – Make sure entire network or computers are protected with Firewall. Firewall can be a software or hardware to block unauthorized access to system. Firewall can prevent sending data outside the network without your permission.
5) Try to exploit all servers, desktop systems, printers and network devices.
6) Verify that all usernames and passwords are encrypted and transferred over secured connection like https (SSL).
7) Verify information stored in website cookies. It should not be in readable format.
8) Verify previously found vulnerabilities to check if the fix is working.
9) Verify if there is no open port in network.
11) Verify all telephone devices.
12) Verify WIFI network security.
13) Verify all HTTP methods. PUT and Delete methods should not be enabled on web server .
14) Password should be at least 8 character long containing at least one number and one special character.
15) Username should not be like “admin” or “administrator”.
16) Application login page should be locked upon few unsuccessful login attempts.
17) Error messages should be generic and should not mention specific error details like “Invalid username” or “Invalid password”.
19) Verify if special characters, html tags and scripts are handled properly as an input value.
20) Internal system details should not be revealed in any of the error or alert messages.
21) Custom error messages should be displayed to end user in case of web page crash.
22) Verify use of registry entries. Sensitive information should not be kept in registry.
23) All files must be scanned before uploading to server.
24) Sensitive data should not be passed in urls while communicating with different internal modules of the web application.
25) There should not be any hard coded username or password in the system.
26) Verify all input fields with long input string with and without spaces.
27) Verify if reset password functionality is secure.
28) Verify application for SQL Injection.
29) Verify application for Cross Site Scripting.
31) Important input validations should be done at server side instead of JavaScript checks at client side.
32) Critical resources in the system should be available to authorized persons and services only.
33) All access logs should be maintained with proper access permissions.
34) Verify user session ends upon log off.
35) Verify that directory browsing is disabled on server.
36) Verify that all applications and database versions are up to date.
37) Verify URL manipulation to check if web application is not showing any unwanted information.
38) Verify memory leak and buffer overflow.
39) Verify if incoming network traffic is scanned to find Trojan attacks.
40) Verify if system is safe from Brute Force Attacks – a trial and error method to find sensitive information like passwords.
41) Verify if system or network is secured from DoS (denial-of-service) attacks. Hacker can target network or single computer with continuous requests due to which resources on target system gets overloaded resulting in denial of service for legit requests.

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