Mastodawn

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Gerhard Klostermeier 2d ago

Hab eine GPN24-Tasse bekommen! Yay!

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Gerhard Klostermeier 3d ago

Suche GPN24-Tasse... #gpn24

Gerhard Klostermeier 3d ago

Hat jemand eine GPN-Tasse übrig? Ich hätte sehr gerne eine für die Sammlung und habe verpasst vorzubestellen... #gpn24

Gerhard Klostermeier 3d ago

// foss.events Apr 1

New on // foss.events: BalCCon2k26 by Linux User Group of Novi Sad - LUGoNS on 18-20 September 2026 in Congress Center, Hajduk Veljkova 11, Novi Sad in #Novi Sad, #Serbia

Find out more on
https://foss.events/2026/09-18-balccon2k26.html

Follow the official account: @BalCCon

Connect via official hashtag(s): #balccon #balccon2k25

Call for participation is running until 01.07.2026

#foss #floss #freesoftware #opensource #events #europe

Gerhard Klostermeier Feb 17

Hacking a home router. Boring?! What if I told you could hack thousands of them? Remotely! Over the Internet! Zero-click! And that's not all.

My colleague did some research and wrote it all up here: https://blog.syss.com/posts/meshhacks/

Highly recommended!
#hacking #iot #embedded #security

MeshHacks: Exploiting Linksys Intelligent Mesh from the Internet

In this blog post, we describe multiple vulnerabilities we found in Linksys Wi-Fi routers, especially exploiting the “Intelligent Mesh™” functionality, which can be used to wirelessly link routers to act as a Wi-Fi mesh.

SySS Tech Blog

Gerhard Klostermeier Jan 25

Had been some time since I did some work on #MifareClassicTool. Finally released a new version. You can now increase values of Value Blocks which only have decrement/transfer/restore permissions.

https://github.com/ikarus23/MifareClassicTool/releases/tag/v4.3.0

Release Version 4.3.0 · ikarus23/MifareClassicTool

This release will not be available via Google Play Google Play requires to target SDK 35+ (this version uses 34). The next version (4.3.1) will address this issue and be released soon. Changelog: ...

GitHub

Gerhard Klostermeier Dec 26

BalCCon Dec 26

Join us at #39c3 #BalCCon Assembly. CTF - https://events.ccc.de/congress/2025/hub/en/event/detail/ctf-smart-house

[39c3] CTF - Smart House

Move from floor to floor, solve challenges with friends, and crack the final safe at the top. Whether you're a beginner or an experienced hacker, everyone’s welcome to learn, collaborate, and have fun at BalCCon Assembly. 🕒 Time: 27 December,...

39c3

Gerhard Klostermeier Oct 22, 2025

Matthias Deeg Oct 20, 2025

I'm back home from the beautiful city of Bergamo and the awesome @nohatcon.

Today, we have published the security advisories concerning the Verbatim security update I was talking about on Saturday in my presentation "Your Security Update is Not Secure Enough".