The ActiveX control in MCINSCTL.DLL for McAfee VirusScan Security Center does not use the IObjectSafetySiteLock API to restrict access to required domains, which allows remote attackers to create or append to arbitrary files via the StartLog and AddLog methods in the MCINSTALL.McLog object.

Mcafee VirusScan 4.03 does not properly restrict access to the alert text file before it is sent to the Central Alert Server, which allows local users to modify alerts in an arbitrary fashion.