freeFTPd 1.0.10 and below contains an overflow condition that is triggered as user-supplied input is not properly validated when handling a specially crafted PASS command. This may allow a remote attacker to cause a buffer overflow, resulting in a denial of service or allow the execution of arbitrary code. FreeFTPd must have an account set to authorization anonymous user account…. freeFTPd 1.0.10 and below contains an overflow condition that is triggered as user-supplied input is not properly validated when handling a specially crafted PASS command. This may allow a remote attacker to cause a buffer overflow, resulting in a denial of service or allow the execution of arbitrary code. FreeFTPd must have an account set to authorization anonymous user account.

Read more http://packetstormsecurity.com/files/123458/freeftpd_pass.rb.txt