Quick write-up of a debugging session involving Sway and systemd.

This is the second part of an article about Linux Security Modules. You may want to read part one first.

I recently developed a tiny Linux Security Module (LSM) and I’d like to describe a bit how the LSM framework works. Indeed, there isn’t much documentation available except some papers from many years ago and LSM has changed a lot since that time. I delved a little into it and I think I can point out some basics that might help someone understand how the current implementation of LSM works.

I was recently confronted with a software exploit challenge on a CTF website that took me much more time to flag that I would have expected at first. The solution was closed to another one I knew but which was not working. I will provide a quick write-up of this method because I still cannot find any mention of it in any paper online, despite its simplicity. I hope it will help someone save some precious brain cycles.

A demonstration showing how one can leverage Linux namespaces to create a very basic container.

As an introduction to this set of articles about malware analysis, I thought I could sum up my researches about malware types since I found a lot of contradictory articles on the web.

It has been over a year since I last posted on this blog. I’ve been thinking a lot about what I could write to keep it alive. I recently started my major in Information Security at Telecom SudParis and I keep on doing sysadmin/security stuff during my free …

Even if I’ve been using Git for quite a long time now, I was still using ftp or even a gross scp to put my code into production. But one day I discovered Capistrano, and it turned out it was really convenient. Let me show you how cool it is.

For my first article on this blog, I wanted to talk about something that matters to me. That’s why I naturally thought of free software. The point of this article is not to do another Wikipedia page about it, but to answer with my words some questions I often hear when people talk about that concept.