Library Computer and Network Security: Vendor Patches and Security Updates

Microsoft Product Support Center

http://support.microsoft.com/default.aspx?scid=fh;RID;faqs
Find product updates, service packs, hot fixes for all Windows products. Check out the "Get Most Recent Version" topic category.

Novell Product Updates

http://support.novell.com/filefinder/
Find product updates, patches and Technical Information Documents (TIDs) by product name.

Apache web Server

http://www.apacheweek.com/features/security-13
Overview of Security Vulnerabilities in Apache httpd 1.3.

SunSolve Online

http://sunsolve.sun.com/
Find latest patches, security alerts and support documents on Sun products.

HP's IT Resource Center

http://us-support.external.hp.com
Find support information by product, patches, knowledge base, use the HP software update manager. Requires you to register to use these services.

Vendor Specific Security Information

(Source: SANS Institute Network Security Roadmap)
http://www.sans.org/newlook/publications/roadmap.htm