Adobe ColdFusion 9 - Administrative Authentication Bypass

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| Packet Storm Advisory 2013-0819-2                                            |
| http://packetstormsecurity.com/                                              |
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| Title: Adobe ColdFusion 9 Administrative Login Bypass                        |
+--------------------+---------------------------------------------------------+
| Release Date       | 2013/08/19                                              |
| Advisory Contact   | Packet Storm ([email protected])       |
| Researcher         | Scott Buckel                                            |
+--------------------+---------------------------------------------------------+
| System Affected    | ColdFusion                                              |
| Versions Affected  | 9.0, 9.0.1, 9.0.2                                       |
| Related Advisory   | APSB13-03                                               |
| Related CVE Number | CVE-2013-0632                                           |
| Vendor Patched     | 2013/01/15                                              |
| Classification     | 1-day                                                   |
+--------------------+---------------------------------------------------------+

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| OVERVIEW |
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The release of this advisory provides exploitation details in relation to a 
known patched vulnerability in Adobe ColdFusion 9.   These details were 
obtained through the Packet Storm Bug Bounty program and are being released
to the community.

The details of this issue were already leaked in the following Metasploit
module:

http://packetstormsecurity.com/1304-exploits/adobe_coldfusion_apsb13_03.rb.txt 

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| DETAILS |
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Adobe ColdFusion versions 9.0, 9.0.1, and 9.0.2 do not properly check the 
"rdsPasswordAllowed" field when accessing the Administrator API CFC that is 
used for logging in. That CFC "Contains basic Administrator functionality, 
including login, logout, the Migration wizard, and the Setup wizard. You must 
call the login method before calling any other methods in the Administrator 
API." 

The login function never checks if RDS is enabled when rdsPasswordAllowed="true". 
This means that if RDS was not configured, the RDS user does not have a password 
associated with their username. This means by setting rdsPasswordAllowed to 
"true", we can bypass the admin login to use the rdsPassword, which in most 
cases, is blank.

By default (and in most production environments), RDS will be disabled thus 
never have been configured. If a user can access the ColdFusion 9.0 
administrator located at /CFIDE/administrator/index.cfm and also access the 
file /CFIDE/adminapi/administrator.cfc, it is possible to fully bypass the 
admin login. ColdFusion 9.0, 9.0.1, and 9.0.2 do not properly check if RDS 
was ever enabled.


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| PROOF OF CONCEPT |
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Sample code below; no changes are needed except to substitute 
[HOSTNAME]/CFIDE/adminapi/administrator.cfc with the proper location 
of the adminapi/administrator.cfc. You may save this file as test.html on 
your desktop and open it from there. After submitting this page, you will be
logged in when going to the ColdFusion administrator page located at 
http://[HOSTNAME]/CFIDE/administrator/index.cfm 

<form action="http://[HOSTNAME]/CFIDE/adminapi/administrator.cfc?method=login" method="post">
    <input type="hidden" name="adminpassword" value="">
    <input type="hidden" name="rdsPasswordAllowed" value="1">
    <input type="submit">
</form>

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| RELATED LINKS |
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https://www.adobe.com/support/security/bulletins/apsb13-03.html
http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2013-0632
http://packetstormsecurity.com/1304-exploits/adobe_coldfusion_apsb13_03.rb.txt 

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+----------------+
| SHAMELESS PLUG |
+----------------+

The Packet Storm Bug Bounty program gives researchers the ability to profit 
from their discoveries.  You can get paid thousands of dollars for one day 
and zero day exploits.  Get involved by contacting us at 
[email protected] or visit the bug bounty page at: 

http://packetstormsecurity.com/bugbounty/




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