Bugtraq mailing list archives
Status bar exploit hides spoofed URLs Eudora, possibly other e-mail clients
From: Brett Glass <brett () lariat org>
Date: Sat, 08 May 2004 11:10:08 -0600
Eudora (as well as, possibly, other e-mail clients) is susceptible to an exploit which can be used to conceal a fraudulent URL. In a fraudulent ("phishing") spam I received this morning, the sender inserted a large number of character entities (in this case, spaces, coded as  ) into the middle of a URL to force the remainder off the right side of the status bar, hiding the true destination:
<a href="http://www.e-gold.com                                                                                                                                                                                 @egegold.com/"><span lang=EN-US style='mso-ansi-language:EN-US'>http://www.e-gold.com/alert</span></a><br>When the mouse pointer is passed over the URL, the status bar at the bottom of the screen shows
http://www.egold.comand does not reveal the spoofed URL. One must view the message source to see the actual URL.
This technique is known to work on some browsers, but this is the first time I've seen it used to spoof e-mail clients.
I am told that if the URL gets much longer, recent versions of Eudora will overflow a buffer in a way that is exploitable by malware. This particular phishing expedition doesn't seem to take advantage of that vulnerability, hoever.
--Brett Glass
Current thread:
- Eudora file URL buffer overflow Paul Szabo (May 07)
- Status bar exploit hides spoofed URLs Eudora, possibly other e-mail clients Brett Glass (May 08)