Podcast
Questions and Answers
______ is a web browser's representation of the elements on a page.
______ is a web browser's representation of the elements on a page.
The DOM
What is the DOM?
What is the DOM?
- A security feature
- A web browser's representation of the elements on a page (correct)
- A type of vulnerability
- A programming language
What is the DOM?
What is the DOM?
- A programming language
- A social media platform.
- A type of computer virus.
- A web browser's representation of the elements on a page (correct)
What can insecure processing of DOM data lead to?
What can insecure processing of DOM data lead to?
What can insecure processing of DOM data lead to?
What can insecure processing of DOM data lead to?
JavaScript that handles data insecurely can enable various ______.
JavaScript that handles data insecurely can enable various ______.
DOM-based vulnerabilities arise when a website passes ______-controllable data from a source to a sink, which then handles the data in an unsafe way.
DOM-based vulnerabilities arise when a website passes ______-controllable data from a source to a sink, which then handles the data in an unsafe way.
What type of attacks can insecurely handled data enable?
What type of attacks can insecurely handled data enable?
What kind of attacks can JavaScript that handles data insecurely enable?
What kind of attacks can JavaScript that handles data insecurely enable?
What are DOM-based vulnerabilities?
What are DOM-based vulnerabilities?
What is taint flow?
What is taint flow?
Taint flow is the transfer of ______-controllable data from a source to a sink.
Taint flow is the transfer of ______-controllable data from a source to a sink.
What is taint flow?
What is taint flow?
What are common sources of taint-flow vulnerabilities?
What are common sources of taint-flow vulnerabilities?
Common sources of taint-flow vulnerabilities include the ______ and user input.
Common sources of taint-flow vulnerabilities include the ______ and user input.
What are common sinks that can lead to DOM-based vulnerabilities?
What are common sinks that can lead to DOM-based vulnerabilities?
Common sinks that can lead to DOM-based vulnerabilities include eval(), innerHTML, and ______.
Common sinks that can lead to DOM-based vulnerabilities include eval(), innerHTML, and ______.
What are common sources of taint-flow vulnerabilities?
What are common sources of taint-flow vulnerabilities?
The most effective way to avoid DOM-based vulnerabilities is to avoid allowing data from any ______ source to dynamically alter the value that is transmitted to any sink.
The most effective way to avoid DOM-based vulnerabilities is to avoid allowing data from any ______ source to dynamically alter the value that is transmitted to any sink.
What are common sinks that can lead to DOM-based vulnerabilities?
What are common sinks that can lead to DOM-based vulnerabilities?
What is the most effective way to avoid DOM-based vulnerabilities?
What is the most effective way to avoid DOM-based vulnerabilities?
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Study Notes
- The DOM is a web browser's representation of the elements on a page.
- Insecure processing of DOM data can introduce vulnerabilities.
- JavaScript that handles data insecurely can enable various attacks.
- DOM-based vulnerabilities arise when a website passes attacker-controllable data from a source to a sink, which then handles the data in an unsafe way.
- Taint flow is the transfer of attacker-controllable data from a source to a sink.
- Common sources of taint-flow vulnerabilities include the URL and user input.
- Common sinks that can lead to DOM-based vulnerabilities include eval(), innerHTML, and location.
- The most effective way to avoid DOM-based vulnerabilities is to avoid allowing data from any untrusted source to dynamically alter the value that is transmitted to any sink.
- Defenses can be implemented within the client-side code, such as validating data on a whitelist basis or sanitizing/encoding data.
- DOM clobbering is an advanced technique in which HTML is injected into a page to manipulate the DOM and ultimately change the behavior of JavaScript on the website.
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