Milking the Tainted Cow

Ben Stock

Cross-Site Scripting is a type of vulnerability which typically involves data flowing from an attacker-controllable source to a security-sensitive sink. In this talk, I will outline how we have used taint tracking to automatically find client-side XSS at a large scale. Moreover, apart from prevalence of this threat, I will outline how the general security landscape of the client-side Web has evolved and why vulnerabilities on the client are becoming more and more prevalent. Last but not least, I will report on our efforts to help developers remediate their issues, and finish with an outlook on what (I think) upcoming challenges for client-side security research might be.