Zisis @_zisis

Greece Joined January 2016

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532
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@parkbot.bsky.social @philparkbot

a week ago

I wrote my first and maybe only Substack post. This is a follow up to my Colwell post where I found a 2007 technical report by two Microsoft employees who interviewed folks from MS, AMD and Intel about the history of the transition, and I learned a lot! computerparkitecture.substack.com/p/the-long-mod…

@parkbot.bsky.social @philparkbot

12 months ago

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offensivecon @offensive_con

5 months ago

"KernelGP: Racing Against the Android Kernel" by Chariton "huku" Karamitas

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Zisis @_zisis

a year ago

You can find the slides from my BHUSA2024 talk Bugs of Yore: A Bug Hunting Journey on VMware's Hypervisor at i.blackhat.com/BH-US-24/Prese…

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argp @_argp

a year ago

Congratulations to my @census_labs colleague Zisis Sialveras (@_zisis) for being accepted to present his amazing work on VMware vulnerability research and exploit development at Black Hat USA 2024: blackhat.com/us-24/briefing…

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vx-underground @vxunderground

2 years ago

The xz backdoor was initially caught by a software engineer at Microsoft. He noticed 500ms lag and thought something was suspicious. This is the Silver Back Gorilla of nerds. The internet final boss.

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Matthew Green is on BlueSky @matthew_d_green

2 years ago

A project my grad student is working on required us to review the implementation of the C++ standard library, and now I want to tear my eyes out.

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Zisis @_zisis

2 years ago

αγνωσται αι βουλαι του gdb

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Тsфdiиg @tsoding

3 years ago

How Fast is Your Computer?

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Ken Shirriff @kenshirriff

3 years ago

The 8086 processor (1978) led to the hugely-popular x86 architecture. Internally, the 8086 uses microcode, running a tiny program for each machine instruction. I'm reverse-engineering the chip from die photos and I can explain exactly how the 8086 microcode engine works.🧵

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argp @_argp

3 years ago

<3 lkml.org/lkml/2022/9/19…

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Trend Zero Day Initiative @thezdi

3 years ago

ZDI Researcher @renorobertr looks at the patch gap between the #VMware ESXi TCP/IP stack and the #FreeBSD kernel it was based on. Some bugs went unpatched for years. Read the details at: zerodayinitiative.com/blog/2022/7/25…

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Dimitris Glynos @dfunc

3 years ago

oldie but goodie, heap overflow and null pointer dereference bugs in #radare2 (fixed in 5.6.0) by Angelos T. Kalaitzidis of @census_labs For more info: census-labs.com/news/2022/05/2… #CVE-2022-0419 #CVE-2021-44974 #CVE-2021-44975

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Zisis @_zisis

4 years ago

once you go 120hz, you never come back

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Daax @daaximus

4 years ago

It's been a while... here's the next part of the MMU virtualization series covering some paging details, MTRR basics, and constructing an EPT hierarchy. revers.engineering/mmu-virtualiza…

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Zisis @_zisis

4 years ago

Sometimes I wonder if there's single human that keeps the "Show file name extensions" option disabled on Windows.

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mdowd @mdowd

4 years ago

Validating a bug is an emotional roller coaster ride

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Frank Boldewin @r3c0nst

4 years ago

#VMWARE #ESXi OpenSLP heap-overflow CVE-2021-21974 walkthrough + poc straightblast.medium.com/my-poc-walkthr… github.com/straightblast/…

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Jonathan Blow @Jonathan_Blow

4 years ago

Very hard to describe how embarrassing this is for everyone involved in the Web and, sort of, software more generally.

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Airbus Security Lab @AirbusSecLab

4 years ago

Everybody loves QEMU, but it sometimes feels like black magic. Check out this series of blog posts by Stéphane for a practical deep dive in QEMU internals: adding a device, interrupts, timers, PCI, etc. github.com/airbus-seclab/…

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argp @_argp

5 years ago

Remote exploitation of a man-in-the-disk vulnerability in WhatsApp (CVE-2021-24027); epic logical exploitation writeup by huku: census-labs.com/news/2021/04/1…