Interesting, a new arena for marketing spin and sales talk - the auctioning of exploits.
WabiSabiLabi is pushing hard for a good price for a ClamAV vulnerability and exploit that it has gotten hold of, it’s dosing it up with a good portion of spin to make it seem like the next big thing - I [...]

Since Ubuntu is getting so fantastically popular nowadays I thought this might be useful to some of you.
I personally think Ubuntu is great, the features, ease of installation, stability and especially the work they have done on things like wireless drivers make it a breeze to get up and running.
It is a pretty secure distro [...]

Damn Vulnerable Linux (DVL) is a Linux-based (modified Damn Small Linux) tool for IT-Security & IT-Anti-Security and Attack & Defense. It was initiated for training tasks during university lessons by the IITAC (International Institute for Training, Assessment, and Certification) and S²e - Secure Software Engineering in cooperation with the French Reverse Engineering Team.

Damn Vulnerable Linux [...]

I came across this while browsing, has some pretty solid stuff, goes deeper than most basic Linux security guides.
It has some good sections like this on protection against fork bombs:

Fork bombs are programs that keep creating child processes until system resources are all used, they actually aren’t remote exploits because they require a local user [...]