- Security Testing Tutorial
- Security Testing - Home
- Security Testing - Overview
- Security Testing - Process
- Security Testing - Malicious Software
- HTTP Protocol Basics
- HTTPS Protocol Basics
- Encoding and Decoding
- Security Testing - Cryptography
- Security Testing - Same Origin Policy
- Security Testing - Cookies
- Hacking Web Applications
- Security Testing - Injection
- Testing Broken Authentication
- Testing Cross Site Scripting
- Insecure Direct Object Reference
- Testing Security Misconfiguration
- Testing Sensitive Data Exposure
- Missing Function Level Access Control
- Cross Site Request Forgery
- Components with Vulnerabilities
- Unvalidated Redirects and Forwards
- Security Testing - Ajax Security
- Testing Security - Web Service
- Security Testing - Buffer Overflows
- Security Testing - Denial of Service
- Testing Malicious File Execution
- Security Testing - Automation Tools
- Security Testing Useful Resources
- Security Testing - Quick Guide
- Security Testing - Useful Resources
- Security Testing - Discussion
Security Testing - Same Origin Policy
Same Origin Policy (SOP) is an important concept in the web application security model.
What is Same Origin Policy?
As per this policy, it permits scripts running on pages originating from the same site which can be a combination of the following −
- Domain
- Protocol
- Port
Example
The reason behind this behavior is security. If you have try.com in one window and gmail.com in another window, then you DO NOT want a script from try.com to access or modify the contents of gmail.com or run actions in context of gmail on your behalf.
Below are webpages from the same origin. As explained before, the same origin takes domain/protocol/port into consideration.
- http://website.com
- http://website.com/
- http://website.com/my/contact.html
Below are webpages from a different origin.
- http://www.site.co.uk(another domain)
- http://site.org (another domain)
- https://site.com (another protocol)
- http://site.com:8080 (another port)
Same Origin policy Exceptions for IE
Internet Explorer has two major exceptions to SOP.
The first one is related to 'Trusted Zones'. If both domains are in highly trusted zone then the Same Origin policy is not applicable completely.
The second exception in IE is related to port. IE does not include port into Same Origin policy, hence the http://website.com and http://wesite.com:4444 are considered from the same origin and no restrictions are applied.