The start update window in update.exe in Avira AntiVir PersonalEdition Classic 7.0 build 151 allows local users to gain system privileges via a "Shatter" style attack on the (1) IParam parameter, and the (2) PBM_GETRANGE and (3) PBM_SETRANGE messages in an unspecified progress bar. NOTE: some details are obtained from third party information.
http://www.securityfocus.com/bid/19889
http://www.securityfocus.com/bid/19843
http://www.securityfocus.com/archive/1/445263/100/0/threaded
http://www.securityfocus.com/archive/1/445205/100/0/threaded