1 / 10

Cross Site Scripting and its Issues

Cross Site Scripting and its Issues. By Odion Oisamoje. What is XSS. Is a vulnerability that enables an attacker lure a computer user to download malicious JavaScript code from a trusted site. Types of XSS. Persistent Attack is stored on the website’s server.

abigail-vega
Télécharger la présentation

Cross Site Scripting and its Issues

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Cross Site Scripting and its Issues By Odion Oisamoje

  2. What is XSS Is a vulnerability that enables an attacker lure a computer user to download malicious JavaScript code from a trusted site.

  3. Types of XSS • Persistent • Attack is stored on the website’s server. • Do not have to go through a link • Non-persistent • Most common • User has to go through a special link to be exposed • Code does not get stored on the server

  4. Types of XSS cont. Figure 1: A typical reflected or non-persistent cross site scripting scenario

  5. Type of XSS Cont. • DOM-based • An emerging area • Attacker code does not have to pass though the server to affect the visitor

  6. How it Works • http://www.youtube.com/watch?v=r79ozjCL7DA

  7. Famous Attack • “In 2005, a MySpace user named Samy discovered a unique way to expand hi buddy list. Within 24 hours, the number of friends in his page grew from 73 to more than 1 million. He achieved this instant popularity by creating the first self-propagating cross-site scripting (XSS) worm and by exploiting the lax security in many Web browsers” (Monthie, 2008).

  8. Prevention – Detection – Response • Reduce Impact • Sanitize input • Work back to the source • Input sanitation and validation on JavaScript code • Be proactive

  9. References • Monthie, B. (2008). What, who, when, where, why, how of XSS. Network World, 25(28), 26. Retrieved from EBSCOhost. • Cross-site Scripting (XSS). (2010, October 10). Retrieved April 15, 2011, from The Open Web Application Security Project (OWASP): https://www.owasp.org

  10. Q & A

More Related