Norton Personal Firewall 2006 9.1.0.33 allows local users to cause a denial of service (crash) via certain RegSaveKey, RegRestoreKey and RegDeleteKey operations on the (1) HKLM\SYSTEM\CurrentControlSet\Services\SNDSrvc and (2) HKLM\SYSTEM\CurrentControlSet\Services\SymEvent registry keys.
https://exchange.xforce.ibmcloud.com/vulnerabilities/27764
http://www.securityfocus.com/bid/18995
http://www.securityfocus.com/archive/1/440110/100/0/threaded