sigma star gmbh

💡 Let’s be honest: most trainings are... boring. 😴 You know the deal: you sit there, the trainer talks at you, and before you know it, your mind is wandering. 💤 That's not how we do it. 👉 All of their sessions are workshops - and yes, you'll be working. 💪✍️ 👉 Expect to roll up your sleeves and dive deep. 🧠🔍 👉 These workshops can get intense and in-depth - but that’s where the magic happens. ✨🔥 No fluff. No passive listening. Just real skills, real insights, and real growth. 🚀💼 So, if you’re ready to get your hands dirty and make some serious progress, we are ready for you. 🙌

🎉 It was a pleasure speaking at BSides Munich on bootloader security for embedded Linux systems! 🔐🐧 Here are the main takeaways: 🛠️ Bootloader filesystem implementations need more attention! 📂 If possible, use a simple filesystem like VFAT—or none at all! 🛠️ I discovered and fixed critical bugs in U-Boot and BareBox—consider upgrading! 🔄✨ ⚠️ Don't forget about downgrade attacks!

Got bugs? We can help!

new goodies ahead. 🐧

🚀 Get ready for another session of our popular "Kernel Internals for Linux Admins" training on 14.10.2024! 🚀 Are you looking to deep dive into Linux internals? Don't miss out—secure your spot today! In this full-day, online training (held in the European time zone), you’ll gain in-depth knowledge of: 🔍 Linux Tracing: Learn how to track and understand what’s happening inside the kernel. 🧠 Linux Scheduling: Master how Linux assigns tasks to CPUs and how you can influence task placement. 🌐 Linux Networking: Discover where and how Linux processes network packets. 💾 Linux Storage & Filesystems: Understand how Linux stores your data and how to optimize storage performance. 💡 Need different time zones or dates? We offer flexible scheduling options—just reach out! 💬 Contact us today to reserve your seat or inquire about alternative sessions. For more details see: https://lnkd.in/d56qYDBG

Join David Gstir in the presentation, “Becoming the Evil Maid: Hacking Android disk encryption for fun and profit“ at #BSidesMunich2024 (November 11, 2024). Learn more under: https://lnkd.in/gF2qZCc7 BSidesMunich 8-Bit :: Forged by HI

🐧🎙️Our very own Richard Weinberger recently delivered a talk on Linux Embedded Security at the Open Source Summit Europe. The key takeaways are: 🛡️ New compliance laws are coming – whether you're a supplier or vendor, you'll need to prioritize security. 🧰 Linux already offers a wide range of security features, but they only work if you implement them. ⚠️ Hardware dependencies are crucial for features like verified boot – here be dragons! 🔄 Long-term product maintenance is tougher than you might expect. #ossummit #linux #security #embedded

🐧So shall it be. having a great time at Plumbers.🐧

3rd day at #ossummit and #linuxplumbers, finally all sigma star gmbh Penguins have arrived. 🚂🐧 Feel free to talk to us if you want to chat about Linux or Security topics! David G. Lorenz Kofler Richard Weinberger David O.

As mentioned in tip 37, it is also possible to fool `/proc/PID/exe`, here's how: 🐧 While `/proc/PID/cmdline` can easily be changed by overwriting its own `argv[]`, the `/proc/PID/exe` will still point to the original executable. If the process is privileged, things are straightforward. With the `PR_SET_MM_EXE_FILE` prctl 🛠️, the link can be changed at will. Using Linux namespaces, it is also possible for an unprivileged process to trick most process utilities 🕵️. 🚨Therefore, `/proc/PID/exe` can only be trusted when the mount (mnt) namespace IDs match!