techrepublic blogs: The term rootkit originated with a reference to the root user account on Unix systems. Rootkits are not limited to Unix, however, or even to administrative user accounts like the Unix root account. No matter what operating system you use, you should be familiar with good practices for detecting and dealing with the threat of rootkits.
Also: Clamav is great
heise-security: According to reports from several security services, the Xvid 1.1.2 Video Codec Library has a security hole which attackers could use to gain control over a PC. Both Windows and Linux applications are affected.
linux.com: Organizations of all sizes need to mitigate the risk of insider threats. Misconduct by authorized users represents a grave threat to an organization. You can secure your network perimeter with intrusion detection systems, firewalls, and virus scanners, but don't neglect to monitor authorized users. The Linux Audit daemon can help you detect violations of your security policies.
ZDNet: The recent OpenOffice worm may be a sign that malware writers are starting to target the increasingly popular open-source software, industry experts say.
With this tip you will be able to work from home using VPN and that too from Linux / FreeBSD system for the proprietary Microsoft Point-to-Point vpn server.
Say you have a nasty application on your Apache webserver that has been installed by some people from the marketing department and you can neither remove nor patch it. Maybe it is a time problem, a lack of know-how, a lack of source-code, or possibly even political reasons. Consequently you need to protect it without touching it. There is ModSecurity, but they say this is only for experts. A straightforward alternative is Remo, a graphical rule editor for ModSecurity that comes with a whitelist approach.
builderau: Malware targeting OpenOffice documents is spreading through multiple operating systems including Mac OS, Windows and Linux, according to Symantec.
zdnet blogs: Jeff Jones has expanded his project to count security flaws (publicly reported and fixed) in the major workstation operating systems and his latest numbers show Windows Vista has by far the best security profile when compared to the major Linux distributions.
The last few weeks have seen a dramatic increase in spam (once again). Estimates say that spam makes now up for 80 - 90% of all emails, and many mail servers have difficulties in managing the additional load caused by the latest spam, and spam filters such as SpamAssassin do not recognize large parts of that spam as they did before. Fortunately, we can block a big amount of that spam at the MTA level.
Washington Post: Makers of some of the most popular extensions, or "add-ons," for Mozilla's Firefox Web browser may have inadvertently introduced security holes that criminals could use to steal sensitive data from millions of users.