Integer overflow in kbdint.c in mod_sftp in ProFTPD 1.3.4d and 1.3.5r3 allows remote attackers to cause a denial of service (memory consumption) via a large response count value in an authentication request, which triggers a large memory allocation.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.02
EPSS Ranking 82.7%