AppSec Israel 2016 has ended
Monday, September 19 • 16:05 - 16:50
Crippling HTTPS with unholy PAC

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You're in a potentially malicious network (free WiFi, guest network, or maybe your own corporate LAN). You're a security conscious netizen so you restrict yourself to HTTPS (browsing to HSTS sites and/or using a "Force TLS/SSL" browser extension). All your traffic is protected from the first byte. Or is it?

We will demonstrate that, by forcing your browser/system to use a malicious PAC (Proxy AutoConfiguration) resource, it is possible to leak HTTPS URLs. We will explain how this affects the privacy of the user and how credentials/sessions can be stolen. We will present the concept of "PAC Malware" (a malware which is implemented only as Javascript logic in a PAC resource) that features: a 2-way communication channel between the PAC malware and an external server, contextual phishing via messages, denial-of-service options, and sensitive data extraction from URI's. We present a comprehensive browser PAC feature matrix and elaborate more about this cross-platform (Linux, Windows, Mac) and cross-browser (IE, Chrome, Safari) threat.

avatar for Amit Klein

Amit Klein

VP Security Research, Safebreach
Amit Klein is a world renowned information security expert, with 25 years in information security and over 30 published technical papers on this topic. Amit is VP Security Research at SafeBreach, responsible for researching various infiltration, exfiltration and lateral movement attacks... Read More →

Monday September 19, 2016 16:05 - 16:50
Main Auditorium