Nortel Telephony Server Denial of Service
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# COMPASS SECURITY ADVISORY http://www.csnc.ch/
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# Product: Telephony Server
# Vendor: Nortel
# Subject: Telephony Server Denial of Service
# Risk: High
# Effect: Currently exploitable
# Author: Cyrill Brunschwiler (cyrill.brunschwiler (at) csnc (dot) ch
# Date: October, 18th 2007
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Introduction:
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A malicious user who can send a flood of packets to specific E-LAN ports on the Telephony Server is able to crash the telephony application. The server needs to be rebooted to resume normal operation.
Nortel has noted this as:
Title: Potential CS1000 DoS Vulnerability
Number: 2007008384
http://support.nortel.com/go/main.jsp?cscat=SECUREADVISORY
Vulnerable:
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Communication Server 1000
and others.
See associated products on the Nortel advisory.
Vulnerability Management:
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June 2007: Vulnerability found
June 2007: Nortel Security notified
October 2007: Nortel Advisory available
October 2007: Compass Security Information
Remediation:
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Follow the recommended actions for the affected systems, as identified in the Nortel Advisory.
Reference:
http://www.csnc.ch/static/advisory/secadvisorylist.html