The BOOTPD component in Enterasys NetSight Console 2.1 and NetSight Inventory Manager 2.1, and possibly earlier, on Windows allows remote attackers to cause a denial of service (daemon crash) via a UDP packet that contains an invalid "packet type" field.
http://www.vupen.com/english/advisories/2007/1271
http://www.securitytracker.com/id?1017876
http://www.enterasys.com/pub/NetSight/Patches/SP1/NetSight_SP1.pdf
http://secunia.com/advisories/24764
http://labs.idefense.com/intelligence/vulnerabilities/display.php?id=506