ZygoSec
@ZygoSec
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Education platform for acquiring skills in modern vulnerability research & software exploitation
London, England
Joined May 2017
Does the iPhone 17 Kill Exploitation for Good? (Memory Integrity Enforcement breakdown) https://t.co/CFMl7I7Nlk
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Out-of-bounds swap on iOS heap when decoding a malicious audio stream (CVE-2025-31200) https://t.co/qRzR5Qo00T
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Today I wanted to share a recent project of mine - a tool for visually representing & tracking memory, for iOS security researchers
bellis1000.medium.com
Happy New Year!🥳
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Just published a tool I wrote a couple months back to pull C++ object names from kernel memory. Bit hacky, but works & is useful if you're someone who spends a lot of time looking at kernel memory dumps. https://t.co/IhWoA7v2m3
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Just published a new blog post - Exploring the ASLR implementation in the iOS kernel
bellis1000.medium.com
In this blog post I wanted to take a look at ASLR and how the iOS kernel implements it for user-space processes.
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Just published a blog post talking about some iOS kernel framebuffer research I’ve been looking at over the last couple weeks. Have a read if you’re interested :)
bellis1000.medium.com
It’s been over two years since I last published a blog, so I thought I’d give this another go in 2020 and kick it off by writing about an…
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Billy Ellis (@bellis1000) giving a guest lecture at my ARM Exploit Development training. 👏🏼 Day 3 almost over. Students are happy. So am I. :)
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Interesting lecture of @bellis1000 of @ZygoSec on #ARMv8 and mobile chip tech at two days conference @codetalkshh in Hamburg. Great trends evolving in mobile tech! . How to use this? Grow your business by securing trends! ... #Future #Security #deepcoding #ARMvx #trendquesthelps
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If you want to learn about ARM exploitation, you should definitely watch this excellent talk from @bellis1000! It is extraordinarily well explained. Introduction to Return Oriented Exploitation on ARM64 https://t.co/pkQsde2Lcg
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Out of curiosity for how debuggers work, I began writing my own bare-bones ARM&ARM64 debugger for iOS. At the moment it has basic functionality, including attaching to processes, viewing register state, and reading and writing to memory!
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Live kernel debugging on a virtualised iOS 12.0! Having the ability to do this sort of thing with whichever iPhone/version you want is gonna greatly assist developers & researchers with future iOS kernel security research
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iOS 11.2 KASLR defeat using thread_get_state() kernel info leak vulnerability
github.com
CVE-2018-4185: iOS 11.2-11.2.6 kernel pointer disclosure introduced by Apple's Meltdown mitigation. - bazad/x18-leak
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