Bugtraq mailing list archives
Re: HTML email "bug", of sorts.
From: "John D. Hardin" <jhardin () impsec org>
Date: Sat, 18 Aug 2001 21:40:05 -0700 (PDT)
On Sat, 18 Aug 2001, Alex Prestin wrote:
<DEFANGED_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.
This is well-known. BGSOUND tags are also vulnerable to misuse in this manner.
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?
http://www.impsec.org/email-tools/procmail-security.html (If you're running a procmail-capable mail server.) Looking at the tag above shows you what it does... -- John Hardin KA7OHZ ICQ#15735746 http://www.wolfenet.com/~jhardin/ jhardin () impsec org pgpk -a finger://gonzo.wolfenet.com/jhardin 768: 0x41EA94F5 - A3 0C 5B C2 EF 0D 2C E5 E9 BF C8 33 A7 A9 CE 76 1024: 0xB8732E79 - 2D8C 34F4 6411 F507 136C AF76 D822 E6E6 B873 2E79 ----------------------------------------------------------------------- In 1998 more than three times as many people in the US were killed by incompetent physicians than were killed by handguns, yet the President of the A.M.A. is adopting "gun safety" as his platform. ----------------------------------------------------------------------- 1172 days until the Presidential Election
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)