An issue was discovered in the SFTP Server component in Core FTP 2.0 Build 674. A directory traversal vulnerability exists using the SIZE command along with a \..\..\
substring, allowing an attacker to enumerate file existence based on the returned information.
packetstormsecurity.com/files/154204/CoreFTP-Server-SIZE-Directory-Traversal.html
seclists.org/fulldisclosure/2019/Aug/21
www.coreftp.com/forums/viewtopic.php?f=15&t=4022509
github.com/sparkeh9/CoreFTP
nvd.nist.gov/vuln/detail/CVE-2019-9648
seclists.org/fulldisclosure/2019/Mar/23
web.archive.org/web/20210125013812/https://www.securityfocus.com/bid/107446
www.exploit-db.com/exploits/46535