Hi,

http://www.altn.com/Support/KnowledgeBase/KnowledgeBaseResults/?Number=KBA-02494

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MDaemon's WorldClient Username Enumeration Vulnerability

KBA-02494
Purpose & Scope

The Free/Busy server included with WorldClient can be used to determine
if an email address is valid in MDaemon. The Free/Busy server is
accessed by programs such as Microsoft Outlook to check attendee
availability when scheduling meetings. WorldClient and BES do not
require the Free/Busy server to check availability.

Procedure

MDaemon's WorldClient Username Enumeration Vulnerability

The Free/Busy server included with WorldClient can be used to determine
if an email address is valid in MDaemon. The Free/Busy server is
accessed by programs such as Microsoft Outlook to check attendee
availability when scheduling meetings. WorldClient and BES do not
require the Free/Busy server to check availability.

If the Free/Busy server is in use and Administrators would like to
protect themselves against this attack a password can be configured
using the following instructions:

    Open the MDaemon user interface.
    Select the Setup menu.
    Select Web and IM Services.
    In the WorldClient section select Calendar.
    In the Free/busy password field enter the desired password.
    Click the OK button.

Once the password is configured anyone accessing the Free/Busy server
from outside of WorldClient will need to update the search path to
include the password by adding “&password=$PASSWORD$”, where $PASSWORD$
is the password specified on the server, to the URL.

Comments

Once the password is configured anyone accessing the Free/Busy server
from outside of WorldClient will need to update the search path to
include the password by adding “&password=$PASSWORD$”, where $PASSWORD$
is the password specified on the server, to the URL.
Note: If there was an existing Free/Busy password configured prior to
updating to 13.0.4, resetting the Free/Busy password is required.

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-- 
syafril
-------
Syafril Hermansyah
Running MDaemon 13.0.4, SP 4.1.5


It will be advantageous to cross the great stream ... the Dragon is on
the wing in the Sky ... the Great Man rouses himself to his Work.


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