Nortel SIP Multimedia PC Client connection handling denial of service

nortel-sip-connection-handling-dos (43364)

Medium Risk

Description:

Nortel SIP Multimedia PC Client is vulnerable to a denial of service, caused by an error in the connection handling. By initiating an overly large number of sessions, a remote attacker could exploit this vulnerability to consume all available resources, resulting in a denial of service.

*CVSS:

Base Score:	5
Access Vector:	Network
Access Complexity:	Low
Authentication:	None
Confidentiality Impact:	None
Integrity Impact:	None
Availability Impact:	Partial
Temporal Score:	4.3
Exploitability:	Unproven
Remediation Level:	Unavailable
Report Confidence:	Confirmed

Consequences:

Denial of Service

Remedy:

No remedy available as of July 9, 2011.

References:

• NORTEL BULLETIN ID: 2008008919, Rev 1: Nortel Response to VSRNT-2008-007 - Nortel SIP Multimedia PC Client Unlimited Session Denial of Service.
• VoIP Security Advisory, 2008-06-25: SIP Multimedia PC Client Unlimited Session DoS.
• CVE-2008-3157: Nortel SIP Multimedia PC Client 4.x MCS5100 and MCS5200 does not limit the number of concurrent sessions, which allows attackers to cause a denial of service (resource consumption) via a large number of sessions.
• SA30854: Nortel SIP Multimedia PC Client Session Handling Denial of Service
• SECTRACK ID: 1020371: Nortel SIP Multimedia PC Client Lets Remote Users Deny Service
• VUPEN/ADV-2008-1942: Nortel SIP Multimedia PC Client Remote Denial of Service Vulnerability

Platforms Affected:

• Nortel SIP Multimedia PC Client 4.0

Reported:

Jun 25, 2008

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The information within this database may change without notice. Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. In no event shall IBM be held liable for any damages whatsoever arising out of or in connection with the use or spread of this information.

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