Heap-based buffer overflow in Titan FTP 3.21 and earlier allows remote attackers to cause a denial of service (crash) via a long FTP command such as (1) CWD, (2) STAT, or (3) LIST.
https://exchange.xforce.ibmcloud.com/vulnerabilities/17172
https://euvd.enisa.europa.eu/vulnerability/EUVD-2004-1635
http://www.securityfocus.com/bid/11069