Hackability inspector
Summary: PortSwigger researcher Gareth Heyes released a Hackability inspector that enumerates JavaScript objects in any rendering engine, using ES5/6 features and bruteforce to find properties and ordering them by interest against a list of known window properties. While testing Safari with the tool for the __proto__ bug, he found that accessing a cross-domain object throws an exception containing the frame's origin, letting an attacker read the origin of any iframe or cross-domain window, and the technique works with popups where X-Frame-Options would not apply.
Key Takeaway: A browser exception that leaks a frame's origin hands an attacker a map of every cross-domain iframe and popup on a page, and the popup variant sidesteps X-Frame-Options entirely.
Read the original at PortSwigger Research ↗
- Topics
- Vulnerabilities & Patching
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