GEN:SID 1:279
Message DOS Bay/Nortel Nautica Marlin
Summary This event is generated when an attempt is made to issue a Denial of
Service attack that causes Bay/Nortel Nautical Marlin bridges to crash.
Impact Denial of Service. Network traffic can be disrupted.
Detailed Information Nautica Marlin bridges will crash if a UDP packet is received on the
SNMP port (161) which has a data length of 0.
Affected Systems Bay/Nortel Nautica Marlin Bridges
Attack Scenarios The bridges can be crashed remotely.  The offending packet uses UDP
(which is not connection oriented) and can be easily spoofed.
Ease of Attack Simple.  Tools are available that can exploit this vulnerability.
Corrective Action Block connections to port 161 from unauthorized hosts using firewall or
router ACLs.  The release notes for the only available upgrade for this
product do not mention this vulnerability.  The product has been
discontinued.  
Additional References CVE:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2000-0221

Bugtraq:
http://www.securityfocus.com/bid/1009

Nortel:
http://www.nortelnetworks.com
Rule References cve: 2000-0221
bugtraq: 1009