A serious flaw was discovered on the Norton Personal Firewall software and users were advised to update the software.

Symantec said that it involves ActiveX controls. This means that hackers can inject hostile code by taking advantage of the flaw.

Three different softwares are affected and they are:
-Norton Internet Security 2004
-Norton Internet Security 2004 Professional edition
-Norton Personal Firewall 2004

The later versions of these software are not affected. So if a user has a version such as 2005, then he or she will not have to download any update.

The patch can be downloaded through the LiveUpdate service.

Source: The Register