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Severity
High
Title
Nortel Multimedia Communications Server 5100 Call Spoofing and Redirection
Description
Due to a lack of verification of credentials when calls are being placed it is possible to cause calls on the MCS 5100 to either be placed as if they originate from a given user when they are not, or that they are placed to a given user when they are not. Details
Category
Unauthorized Access
Vendor
Nortel
Product
Multimedia Communications Server 5100 3.x
Released
2008-10-08
updated
2008-10-08
Response
Attempting to address the issue
Recommendations
To completely address the issue requires a patch from Nortel.More details can be found in Nortel SECURITY ADVISORY BULLETIN, 2008009102, Rev 1 at http://support.nortel.com/go/main.jsp?cscat=BLTNDETAIL&id=775223
Implementation of general best practice guidance will aid in limiting the exposure of this vulnerability. Nortel is recommending not to use snoop command to defend against potential exploits.
In the short term it is recommended that a VoIP aware IPS product, such as VoIPguard, with signatures to detect attempts to exploit this issue, be implemented to prevent it from being exploited.
Nortel customers with a valid support agreement may wish to speak with their support contact in order to obtain additional vendor details. Tracking Id
VSRNT-2008-010
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Each line represents an individual vulnerability or group of vulnerabilities. For example, "UCM Multiple Hardcoded Passwords" is presented here in a single line but was reported to Nortel as sixteen (16) individual vulnerabilities.
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