Vulnerability CVE-2007-5639
Published: 2007-10-23   Modified: 2012-02-12

Description:
The Nortel UNIStim IP Softphone 2050, IP Phone 1140E, and other Nortel IP Phone, Mobile Voice Client, and WLAN Handsets products allow remote attackers to cause a denial of service (device hang) via a flood of Mute and UnMute messages that have a spoofed source IP address for the Signaling Server.

See advisories in our WLB2 database:
Topic
Author
Date
Low
Nortel IP Phone Flooding Denial of Service
Daniel Stirniman...
23.10.2007

Type:

CWE-Other

CVSS2 => (AV:N/AC:M/Au:N/C:N/I:N/A:C)

CVSS Base Score
Impact Subscore
Exploitability Subscore
7.1/10
6.9/10
8.6/10
Exploit range
Attack complexity
Authentication
Remote
Medium
No required
Confidentiality impact
Integrity impact
Availability impact
None
None
Complete
Affected software
Nortel -> Ip softphone 2050 
Nortel -> Mobile voice client 2050 

 References:
http://securityreason.com/securityalert/3273
http://support.nortel.com/go/main.jsp?cscat=BLTNDETAIL&id=654715
http://www.csnc.ch/static/advisory/csnc/nortel_IP_phone_flooding_denial_of_service_v1.0.txt
http://www.securityfocus.com/archive/1/482480/100/0/threaded
http://www.securityfocus.com/bid/26122
https://exchange.xforce.ibmcloud.com/vulnerabilities/37253
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