The \Device\SymEvent driver in Symantec Norton Personal Firewall 2006 18.104.22.168, and possibly other products using symevent.sys 22.214.171.124, allows local users to cause a denial of service (system crash) via invalid data, as demonstrated by calling DeviceIoControl to send the data, a reintroduction of CVE-2006-4855.
CVSS Severity (version 2.0):
Impact Subscore: 6.9
Exploitability Subscore: 3.9
CVSS Version 2 Metrics:
Access Vector: Locally exploitable
Access Complexity: Low
Authentication: Not required to exploit
Impact Type: Allows disruption of service
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20070314 SymEvent Driver Local Access System Denial of Service
Vulnerable software and versions