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Category:   Device (VoIP/Phone/FAX)  >   Nortel IP Phone Vendors:   Nortel
Nortel IP Phones Predictable UNIStim Sequence Numbers Facilitate Hijacking Attacks
SecurityTracker Alert ID:  1019847
SecurityTracker URL:
CVE Reference:   CVE-2008-6564   (Links to External Site)
Updated:  May 5 2009
Original Entry Date:  Apr 15 2008
Impact:   Disclosure of system information, User access via network
Fix Available:  Yes  Vendor Confirmed:  Yes  

Description:   A vulnerability was reported in certain Nortel IP Phones. A remote user can execute arbitrary code on the target system. A remote user can determine the installation path.

A remote user monitoring the network between the client and the server can monitor the UNIStim protocol sequence numbers and then spoof the protocol to issue alternate commands and potentially hijack a session.

VoIPshield Systems reported this vulnerability.

The original advisory is available at:,com_fabrik/Itemid,203/task,viewTableRowDetails/fabrik,1/rowid,27/_cursor,2/_total,5/tableid,1/

Impact:   A remote user monitoring the network can hijack UNIStim protocol sessions.
Solution:   The vendor has issued a patch (install patch MPLR24368 and use SMC2450).

The vendor's advisory is available at:

Vendor URL: (Links to External Site)
Cause:   Access control error, Randomization error

Message History:   None.

 Source Message Contents

[Original Message Not Available for Viewing]

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