Upgrade to version 2.2.1 or higher, as it has been reported to fix this vulnerability. An upgrade is required as there are no known workarounds.
Vendor URL: http://www.freetype.org/
Vendor Specific News/Changelog Entry: http://sourceforge.net/project/shownotes.php?release_id=416463
Related OSVDB ID: 25656
Related OSVDB ID: 25654