[Full-disclosure] [ZH2005-14SA] Phishing problems on MSN

[Giovanni Delvecchio]

>[ZH2005-14SA] Phishing problems on MSN
>
>Date: July 1th 2005
>
>Author:Giovanni Delvecchio
>
>email: badpenguin at zone-h.org
>
>
>
>Overview
>=======
>Multiple phishing problems exist on support.msn.com, permitting to a 
>possible attacker to conduct phishing attack against a user.
>
>
>Details
>=====
>1)Input passed to the "ru" parameter in "pplogin.aspx" isn't properly
>sanitised before being returned to the user
>
>
>Example:
>
>http://support.msn.com/pplogin.aspx?ru=http://www.evil- 
>site.com">www.msn.com/
>
>or
>
>http://support.msn.com/pplogin.aspx?ru=%68%74%74%70%3A%2F%2F%77%77%77% 
>2E%65%76%69%6C%2D%73%69%74%65%2E%63%6F%6D%22%3E%77%77%77%2E%6D%73%6E% 
>2E%63%6F%6D/
>
>The problem has been fixed today.
>
>Here is possible see a screen shot:
>http://www.zone-h.org/files/49/msn1.jpg
>
>
>
>2)Input passed to the 'mspplogin' parameter isn't properly sanitised, and 
>by
>using specialy crafted URL an attacker can cause the user to be redirected
>to an arbitrary URL for the passport authentication.
>
>
>Example:
>http://support.msn.com/pplogin.aspx?msppchlg=1&mspplogin=http://www.evil-site.com/login.srf%3F
>
>This problem at the moment has not been fixed.
>
>
>
>Reference
>=======
>http://www.zone-h.org/advisories/read/id=7764
>

UPDATE - July 4th 2005
==============

3)Another phishing problem exists on login.passport.net.
The problem is caused due to input passed to the "ru" in
"uilogout.srf" isn't properly sanitised.
By using specialy crafted URL an attacker can cause the user
to be redirected to an arbitrary URL for the passport
authentication.


Example:

http://login.passport.net/uilogout.srf?id=2&ru=http://www.evil-site.com&ec=1

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