This is a follow-up document that discusses exploiting the glibc __tzfile_read integer overflow to buffer overflow and leveraging Vsftpd.
You can download it from the following link: https://packetstormsecurity.com/files/download/126125/exploiting-tzfile-2.txt
Source: https://packetstormsecurity.com/files/126125/Exploiting-glibc-__tzfile_read-Part-II.html