Cisco Security Advisory: Several vulnerabilities have been reported in Cisco ONS 15000 based products, allowing malicious people to cause a denial of service or bypass authentication.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/33843/cisco-sa-20040721-ons.txt
Source: https://packetstormsecurity.com/files/33843/Cisco-Security-Advisory-20040721-ons.html