Kaspersky Anti-Virus 5.0 (5.0.712); Antivirus Personal 5.0.x; Anti-Virus 6.0 (6.0.3.837), 7 (7.0.1.325), 2009 (8.0.0.x), and 2010 (9.0.0.463); and Internet Security 7 (7.0.1.325), 2009 (8.0.0.x), and 2010 (9.0.0.463); use weak permissions (Everyone:Full Control) for the BASES directory, which allows local users to gain SYSTEM privileges by replacing an executable or DLL with a Trojan horse.
http://www.vupen.com/english/advisories/2009/3573
http://www.securitytracker.com/id?1023367
http://www.securitytracker.com/id?1023366
http://www.securityfocus.com/archive/1/508508/100/0/threaded