Sorry to shoot you down, but this isn't a security issue at all. You can do the same thing by typing some text, highlighting it, right-clicking, clicking Hyperlink, and typing an address. On the receiving end, the client will get: <a href="http://www.foo-labs.info">http://www.cybertrion.com</a> which is perfectly fine. They'll see after they click on the link that they're going to foo-labs. At that point, it's out of Outlook's hands. Now, if Outlook showed in the mouseover the cybertrion.com link, then they would be a problem, but it appears to be working fine on Outlook 2003. Haven't tested previous versions, but this seems like it's "working as designed". Regards, Michael Scovetta Computer Associates Senior Application Developer -----Original Message----- From: Bakchodiya [mailto:bakchodiya@xxxxxxxxx] Sent: Wednesday, May 18, 2005 4:28 PM To: bugtraq@xxxxxxxxxxxxxxxxx Cc: full-disclosure@xxxxxxxxxxxxxxxxx Subject: Security issue in Microsoft Outlook An issue has been discovered in MS Outlook (All Versions) where anyone can fake a URL & send it across. How does it work: Lets compose an email in MS Outlook, lets type http://www.cybertrion.com & put a space after it to make it a link. Now put your cursor just before cybertrion & type any URL for eg: http://www.foo-labs.info now send it to anyone. The receiver will see the URL as http://www.foo-labs.info but when he clicks on it it will directly take him to http://www.cybertrion.com I am not sure how critical this is but it can fool alot of people & result in download of a virus. For more details and Discovered by: Cybertrion Systems, http://www.cybertrion.com __________________________________ Do you Yahoo!? Yahoo! Mail - Find what you need with new enhanced search. http://info.mail.yahoo.com/mail_250