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XSS Attack 2: Perform unauthorized activities If the HTTPOnly cookie attribute is set, we cannot steal the cookies through JavaScript. However, using the XSS attack, we can still perform unauthorized actions inside the application on behalf of the user.
The Domain Attribute of Cookies The domain attribute specifies the domain for which the cookie is valid and tells the browser to which websites it can be sent with the request. However, a cookie may be used in multiple subdomains belonging to the same domain.
How are cookies scoped?
A cookie’s domain attribute determines which domains can access the cookie. If a cookie is scoped to a parent domain, then that cookie will be accessible by the parent domain and also by any other subdomains of the parent domain.
How do I share cookies between subdomains?
If you want to share cookies across subdomains, but leave out other subdomains, you should explicitly state which subdomains you want to read them, setting a new cookie for each, rather than using wildcards.
Cooking Sharing Between Subdomains (Shared-Session SSO) Browser cookies can be shared across subdomains if their domain flag is set to a common parent domain. In this case, the cookie will be sent for any subdomain of facebook.com .
How to do Cookie stealing with cross site scripting vulnerability?
Cookie stealing is the process of exploiting the XSS vulnerability (Non-persistent/persistent) and steal the cookie from the victim who visit the infected link. These cookie will be used to compromise their accounts. Get the Cookie stealer from the link i mentioned.
When do attackers use cross site scripting ( XSS )?
This generally happens when the site has a vulnerability and the attacker uses something known as cross-site scripting (XSS) to exploit that vulnerability. This is found mostly in badly-coded websites where the developer forgets to include certain security measures to prevent an attacker from running a cross-site script.
How are cookies tracked in cross site scripting?
As stated earlier, when we request a webpage to a server the server contacts that site and renders the webpage to our local machine. While rendering the webpage which is mostly HTML, CSS & some JavaScript along with that it also sends a cookie (1st party cookie) which identifies the session.
But that’s not the only purpose of cookies they are also extensively used to keep a track of your preferences online and they travel from one server to another and can be intercepted and stolen quite easily. This article discusses how cookies move around the web and how they can be stolen.