Showing Posts From

April 2018

Huawei Mate 9 Pro Mobile Pwn2Own 2017

A whitepaper details vulnerabilities discovered in the Huawei Mate 9 Pro during Mobile Pwn2Own 2017. The document focuses on security issues found in the Huawei Reader and HIApp applications. Technical details of the vulnerabilities and exploitation methods are presented in the document.

Apple Safari - Wasm Section Exploit

A technical investigation was conducted into a vulnerability in Apple Safari's Web Assembly (Wasm) implementation discovered during Pwn2own 2018. The vulnerability (CVE-2018-4121) was found in the relatively new Wasm component of WebKit, which was likely less thoroughly tested. The paper details technical exploration of the exploit techniques on macOS 10.13.3.

  • 13 Apr 2018

Some Brief Notes on WebKit Heap Hardening

WebKit has implemented substantial heap hardening techniques to improve memory safety in browsers. The changes include Gigacages, which isolate different object types into separate heaps, and IsoHeap, which allocates objects in dedicated memory pages. Additional protections involve pointer poisoning to make type confusion attacks more difficult.