Minix 3 and the microkernel experience
Minix Firewall Project
Packet filters are an endangered system component. Despite the excellent quality of the Linux Netfilter implementation, a number of security issues have surfaced in the past. If a subsystem of this kind is running on the Linux kernel, it will endanger system security. Building on work by the Tanenbaum group, the Technical University of Applied Science Berlin ported the widespread Netfilter framework to Minix 3 .
Here again, the stability of the microkernel architecture delivers additional benefits. In Linux, an attacker who succeeds in provoking a crash – for example, by exploiting a buffer overflow in the do_replace() function – can bring a Linux firewall to its knees. In Minix 3, a single user process could crash without compromising system security. The reincarnation server would simply restart the process.
The differences become even more apparent if an attacker succeeds in executing code. In Minix, a hijacked user process is still a problem, but the effect is far less serious thanks to isolation.
Even Microsoft is exploring their own microkernel system, named Singularity . Although Minix has played the microkernel game for many years now, its biggest obstacle to becoming more widespread has always been its non-free license. Now that Minix 3 is released under the BSD open source license and the firewall extensions are available under the GPL . Researchers at the TFH Berlin are also working on exploring Minix's potential as a virtualized firewall. Stability, a small footprint, and a new licensing model give Minix 3 a strong potential for growth, especially in embedded systems.
- Tanenbaum, Andrew S., "Some Notes on the 'Who wrote Linux' Kerfuffle, Release 1.5," 2004, http://www.cs.vu.nl/~ast/brown/
- Minix Project: http://www.minix3.org
- Torvalds, Linus, and David Diamond. Just for Fun. HarperBusiness, 2001
- Tanenbaum, Andrew S., and Albert S. Woodhull. The Minix Book: Operating System Design and Implementation. Prentice-Hall, 2006
- Weis, Rüdiger, "Linux is obsolete 2.0," presented at Chaos Communication Camp 2007, http://public.tfh-berlin.de/~rweis/vorlesungen/ComputerSicherheit/WeisLinuxIsObsolete2.pdf
- Microsoft Singularity: http://www.codeplex.com/singularity
- Minixwall: http://wiki.tfh-berlin.de/~minixwall
Version 16 of the popular Linux desktop reveals new tools, edge-snapping, and performance improvements.
Symantec says Linux-Darlioz burrows in through PHP.
Dell renews its quest for the ultimate developer machine.
Innovative back door looks like normal SSH traffic.
One of CeBITs most successful forums opens the new year with a new name. The popular Open Source Forum continues in 2014 under the name Special Conference: Open Source. This year, the forum will be bigger and offer a wider range of possibilities for sponsors.
New release offers better graphics drivers and expands filesystem support.
New mail protocol will shut out the NSA and prevent snooping on metadata.
A new web application helps users visualize distributed denial-of-service attacks.
Ubuntu 13.10 takes a step toward convergence, with lots of mobility, but Mir only partly here.
Galileo board is targeted to embedded developers and educational institutions.