AntiVirus editors

• AVP : http://www.avp.ch/avpve/
• CAI : http://www3.ca.com/virus/
• F-Secure : http://www.f-secure.com/virus-info/
• Kaspersky : http://www.viruslist.com/eng/index.html
• NAI : http://vil.nai.com/vil/default.asp
• Sophos : http://www.sophos.com/
• Symantec : http://www.symantec.com/avcenter/vinfodb.html
• Trend Micro : http://www.antivirus.com/vinfo/virusencyclo/default.asp
• Wild List : http://www.wildlist.org/

Software & systems editors (Security Website)

• Apple  : http://www.apple.com/support/security/security.html 
• CheckPoint :  http://www.checkpoint.com/techsupport/alerts/list_vun.html
• CISCO : http://www.cisco.com/public/support/tac/fn_index.html
• HP : http://www.itrc.com
• IBM : http://www-1.ibm.com/services/continuity/recover1.nsf/mss/advisories
• Microsoft : http://www.microsoft.com/technet/security/default.mspx
• Netscape : http://home.netscape.com/products/security/resources/notes.html
• Novell : http://support.novell.com/security-alerts/
• Oracle : http://www.oracle.com/technology/deploy/security/alerts.htm
• SCO : http://www.sco.com/security
• Silicon Graphics : http://www.sgi.com/support/security/advisories.html

BSD systems :

• FreeBSD : ftp://ftp.freebsd.org/pub/FreeBSD/CERT/advisories/
• NetBSD : http://www.netbsd.org/Security/advisory.html
• OpenBSD : http://www.openbsd.org/security.html

Linux systems :

• Debian : http://www.debian.org/security/
• Mandrake : http://www.mandrakesoft.com/security/advisories
• Red Hat Enterprise : http://rhn.redhat.com/errata/
• Slackware : http://slackware.com/security
• SuSE : http://www.suse.de/security/index.html
• SUN : http://sunsolve.sun.com/