Secunia Security Advisory – Nortel has acknowledged a vulnerability in Business Communications Manager, which potentially can be exploited by malicious people to poison the DNS cache.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/60511/sa27433.txt
Source: https://packetstormsecurity.com/files/60511/Secunia-Security-Advisory-27433.html