The ABB IDAL FTP server is vulnerable to a buffer overflow when a long string is sent by an authenticated attacker. This overflow is handled, but terminates the process. An authenticated attacker can send a FTP command string of 472 bytes or more to overflow a buffer, causing an exception that terminates the server.
packetstormsecurity.com/files/153395/ABB-IDAL-FTP-Server-Buffer-Overflow.html
seclists.org/fulldisclosure/2019/Jun/35
www.securityfocus.com/bid/108886
search.abb.com/library/Download.aspx?DocumentID=3ADR010377&LanguageCode=en&DocumentPartId=&Action=Launch
www.darkmatter.ae/xen1thlabs/published-advisories/