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Category:   Application (Generic)  >   Microsoft Office Vendors:   Microsoft
Microsoft Office Communicator VoIP Processing Bugs Let Remote Users Deny Service
SecurityTracker Alert ID:  1021294
SecurityTracker URL:  http://securitytracker.com/id/1021294
CVE Reference:   CVE-2008-5179, CVE-2008-5180, CVE-2008-5181   (Links to External Site)
Updated:  Dec 10 2008
Original Entry Date:  Dec 1 2008
Impact:   Denial of service via network
Vendor Confirmed:  Yes  

Description:   Several vulnerabilities were reported in Microsoft Office Communicator. A remote user can cause denial of service conditions.

A remote user can send specially crafted instant messages that contain a large number of emoticons to cause the target user's Microsoft Communicator to become temporarily unresponsive and fail to respond to incoming invite messages. The target phone may be required to re-register.

A remote user can send a specially crafted RTCP receiver report packet to cause denial of service conditions. Microsoft Communicator, Office Communications Server (OCS), and Windows Live Messenger are affected.

A remote user can cause the target user's Microsoft Communicator to open a large number of sessions, consuming excessive memory on the target user's system.

The original advisories are available at:

http://www.voipshield.com/research-details.php?id=131
http://www.voipshield.com/research-details.php?id=132
http://www.voipshield.com/research-details.php?id=133

VoIPshield Systems reported these vulnerabilities.

Impact:   A remote user can cause denial of service conditions.
Solution:   No solution was available at the time of this entry.
Vendor URL:  www.microsoft.com/ (Links to External Site)
Cause:   State error
Underlying OS:  Windows (Any)

Message History:   None.


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