Both versions 2.4 and 2.4.5 of HP printers suffer from a buffer overflow in the LIST and NLST commands.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/53179/hpftp-dos.txt
Source: https://packetstormsecurity.com/files/53179/hpftp-dos.txt.html