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Nortel Products Multiple Vulnerabilities
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Secunia Advisory:
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SA27234
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Release Date:
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2007-10-18
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Last Update:
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2007-10-26
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Popularity:
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4,925 views
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Critical:
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Less critical
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Impact:
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Exposure of sensitive information
DoS
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Where:
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From local network
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Solution Status:
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Vendor Patch
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| OS: | Nortel Audio Conference Phone 2033
Nortel Business Communications Manager 3.x
Nortel Business Communications Manager 4.x
Nortel Business Communications Manager 50
Nortel Centrex IP Client Manager (CICM)
Nortel Communication Server 1000
Nortel IP Phone 1100 Series
Nortel IP Phone 2000 Series
Nortel Multimedia Communication Server 5100
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| Software: | Nortel IP Softphone 2050
Nortel Mobile Voice Client 2050
Nortel Multimedia Communication Server 5100 3.x
Nortel Multimedia Communication Server 5100 4.x
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| CVE reference: | CVE-2007-5637
CVE-2007-5638
CVE-2007-5640
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Description:
Some vulnerabilities have been reported in various Nortel products, which can be exploited by malicious people to cause a DoS (Denial of Service) and to eavesdrop with affected devices.
1) The problem is that it is possible to send spoofed registration messages to the server to which a UNIStim IP phone is connected, forcing the IP phone to re-register. This can be exploited to cause a DoS by continuously sending re-registration messages.
2) The problem is that it is possible to send spoofed "Open Audio Stream" messages to an IP phone. This can be exploited to open an audio channel and eavesdrop with the IP phone.
The vulnerabilities are reported in the following products (see vendor advisory for details):
* BCM 4.0, BCM 3.7, BCM50
* SRG1.0, SRG1.5, SRG50
* CS1000/Meridian1
* IP Audio Conf Phone 2033
* IP Phone 1100 series
* IP Phone 200x
* IP Softphone 2050
* Mobile Voice Client 2050
NOTE: The IPCM used in CS2000 and CS2100 is not affected when the UNIStim security protocol is enabled. The vendor still investigates if MCS5100 and MCS5200 are affected by the vulnerability.
Solution:
Apply patches (see vendor advisory for details).
http://www116.nortel.com/pub/repository/CLARIFY/DOCUMENT/2007/42/022872-01.pdf
http://www116.nortel.com/pub/repository/CLARIFY/DOCUMENT/2007/42/022870-01.pdf
Provided and/or discovered by:
Daniel Stirnimann and Cyrill Brunschwiler, Compass Security Network Computing AG.
Changelog:
2007-10-26: Added CVE reference.
Original Advisory:
Nortel:
http://support.nortel.com/go/main.jsp?cscat=BLTNDETAIL&id=654641
http://support.nortel.com/go/main.jsp?cscat=BLTNDETAIL&id=654714
Compass Security Network Computing AG:
http://www.csnc.ch/static/advisory/cs...one_forced_re-authentication_v1.0.txt
http://www.csnc.ch/static/advisory/cs...l_IP_phone_surveillance_mode_v1.0.txt
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Please note: The information that this Secunia Advisory is based on comes from a third party unless stated otherwise.
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