_________ is a security standard that prevents the browser from interpreting user input as script.
- CORS
- CSP
- CSRF
- HTTPS
Content Security Policy (CSP) is a security standard that prevents the browser from interpreting user input as a script. It helps mitigate the risk of XSS attacks by defining and enforcing a set of rules for how resources should be loaded on a web page.
When implementing CSP, the _________ directive is crucial in restricting resources the page can load.
- connect-src
- img-src
- script-src
- style-src
When implementing CSP, the connect-src directive is crucial in restricting resources the page can load. It controls which URLs the document is allowed to make requests to, helping prevent unwanted network requests that could pose security risks.
In an XSS attack, the _________ method of XSS involves the attacker injecting a script that is stored on the server.
- DOM-based
- Persistent
- Reflected
- Stored
In a stored XSS attack, the injected script is stored on the server and served to users, making it more dangerous.
_________ encoding is a common technique to prevent XSS by converting special characters into HTML entities.
- Base64
- HTML
- URL
- UTF-8
HTML encoding is a common technique to prevent XSS by converting special characters into HTML entities, making it difficult for attackers to inject malicious scripts.
To mitigate DOM-based XSS attacks, one should avoid using _________ directly with user input.
- document.write()
- getElementById()
- innerHTML
- setAttribute()
Mitigating DOM-based XSS involves avoiding direct use of the innerHTML property with user input, as it can be exploited to execute malicious scripts within the DOM.
A developer is implementing CSP for the first time. What common challenges might they face?
- Blocking Legitimate Scripts
- Compatibility Issues with Older Browsers
- Difficulty in Debugging
- Increased Load Times
Implementing Content Security Policy (CSP) for the first time may face compatibility issues with older browsers. These issues could arise due to the introduction of security restrictions that are not supported in older browser versions.
Initialization parameters for a servlet are configured in the _________ file.
- config.xml
- initparams.xml
- servlet.xml
- web.xml
Initialization parameters for a servlet are configured in the web.xml file.
What is the significance of using HttpOnly cookies in the context of XSS prevention?
- They are encrypted during transmission
- They can only be accessed via HTTP
- They cannot be accessed by JavaScript
- They have a longer expiration time
HttpOnly cookies cannot be accessed by JavaScript, making them more secure against XSS attacks as malicious scripts won't have access to sensitive cookie information.
What is the key difference between Stored XSS and Reflected XSS attacks?
- Reflected XSS involves non-persistent injection
- Reflected XSS targets the client-side
- Stored XSS involves persistent injection
- Stored XSS targets the server-side
Stored XSS involves the injection of malicious scripts that persist on the target, whereas Reflected XSS involves non-persistent injection and reflects the payload back to the user.
A web application uses user input in its search functionality without proper sanitization. Identify the type of XSS vulnerability.
- Blind XSS
- DOM-based XSS
- Reflected XSS
- Stored XSS
In a scenario where user input is stored without proper sanitization, it can lead to Stored XSS vulnerability. This occurs when the malicious script is permanently stored on the target server and served to users who access the affected page.