[Full-disclosure] Earthlink TotalAccess ActiveX Unsafe Methods Vulnerability

Title:
-------------------
Earthlink TotalAccess ActiveX Unsafe Methods Vulnerability


Vendor Contacted:
-------------------
now-ish.


Background Info:
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Earthlink TotalAccess Download Site: http://www.earthlink.net/software/free/totalaccess/highspeed/


Description:
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Remote exploitation of an unsafe method call allows remote attackers to add entire individual e-mail addresses or entire domains to the spam whitelist.


Analysis:
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In order to exploit this vulnerability an attacker would have to entice a user to visit a webpage.

The affected DLL is: C:\Program Files\EarthLink TotalAccess\SpamBlocker.dll with CLSID: 3D6A4D0C-66AC-46D4-ACE1-75A1D7E579D8

It is marked safe for scripting:
RegKey Safe for Script: True
RegKey Safe for Init: False
Implements IObjectSafety: True

and has the following interesting methods:

AddDomainToWhitelist
Sub AddDomainToWhiteList (
ByVal sDomain As String ,
ByVal bShowConfirmation As Boolean
)

AddSenderToWhitelist
Sub AddSenderToWhiteList (
ByVal sEmailList As String ,
ByVal sDisplayName As String ,
ByVal bShowConfirmation As Boolean ,
ByVal sSyncId As String
)



Might have some form of validation, but it sure doesn't appear so.

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