Cisco ONS 15454 controller cards with software 9.6 and earlier allow remote attackers to cause a denial of service (flash write outage) via a TCP FIN attack that triggers file-descriptor exhaustion, aka Bug ID CSCug97315.
http://tools.cisco.com/security/center/viewAlert.x?alertId=33681
http://tools.cisco.com/security/center/content/CiscoSecurityNotice/CVE-2014-2139