A flaw in the way the Firefox and Opera browsers handle an image file could allow an attacker to see what Web sites a person has visited. The problem concerns how the two browsers handle a ".BMP," or bitmap, image file, according to an advisory written by Gynvael Coldwind of Vexillium.org, who posted a video illustrating the problem. I always find it interesting when two pieces of software together can cause a security vulnerability.

The link for this article located at Network World is no longer available.