TYPSoft FTP Server 1.10 allows remote authenticated users to cause a denial of service (CPU consumption) via \//../\ arguments to (1) mkd (2) xmkd (3) dele (4) size (5) retr (6) stor (7) appe (8) rnfr (9) rnto (10) rmd or (11) xrmd as demonstrated using \//../qwerty\.