Bugtraq mailing list archives
HTML email "bug", of sorts.
From: Alex Prestin <wakko () bitey net>
Date: Sat, 18 Aug 2001 06:17:25 -0400 (EDT)
I'm not sure this is the proper forum for "conspiracy-theory" bugs, but I figured this would be of interest to anyone trying to prevent the names of valid email accounts they either own or administer from being verified and added to "official" known-good spam rosters. You may have heard of "web-bugs" before. Or you may not have. For the benefit of the less-experienced, here's what they are and what they do: "Web bugs" are small, 1x1 (or similar-sized) transparent GIF images which can be used to track the movement of a user around the web. About 1 in 10 sites use them. Their effectiveness at this task is somewhat questionable, but they can be used more effectively for a different task: I've started noticing something very disturbing in the HTML in spam mails recently. I've started seeing web bugs. Below is an example from a recent email: <img src="http://www.megahardcoresex.com/sites/XXXXXXXX0 (continued) 3b/sf03b08152001.gif?M=XXXXXXXXX&ID=wakko () bitey net" width="1" height="1"> See it? A web bug. If I opened this mail in an HTML-capable browser, that little image would've popped up and I would've been none the wiser. My address would also have been verified by the sender, and stored in a large database of valid recipients. So, anyone have any idea of how to deal with this latest little spammer toy? Is there any effective way to filter out web bugs without adversely affecting the delivery intact of legitimate messages? Could software change to at least warn viewers that this HTML viewer is accessing offsite content? Is it worth doing? Anyone? Bueller? - A.P.
Current thread:
- Security Update: [CSSA-2001-031.0] Linux -security issues in ucd-snmp Support Info (Aug 17)
- HTML email "bug", of sorts. Alex Prestin (Aug 18)
- RE: HTML email "bug", of sorts. Russell Garrett (Aug 19)
- Re: HTML email "bug", of sorts. John D. Hardin (Aug 19)
- Re: HTML email "bug", of sorts. role+bugtraq (Aug 19)
- Re: HTML email "bug", of sorts. Daryl Banttari (Aug 19)
- Re: HTML email "bug", of sorts. Jon Masters (Aug 19)
- Re: HTML email "bug", of sorts. Jeffrey W. Baker (Aug 19)
- Re: HTML email "bug", of sorts. Jason Haar (Aug 20)
- Re: HTML email "bug", of sorts. Thor (Aug 20)
- Re: HTML email "bug", of sorts. John Fitzgibbon (Aug 20)
- Re: HTML email "bug", of sorts. Sean Straw / PSE (Aug 21)
- HTML email "bug", of sorts. Alex Prestin (Aug 18)