Just had a user infected by a TTF font file, and did not have this patch installed. After installing patch, the affected TTF font file was rendered impotent!
Version: 2850851
Date Published: 7/8/2013
File name: Windows8-RT-KB2850851-x86.msu
File size: 2.0 MB
KB Articles: KB2850851
Security bulletins: MS13-053