Turbo FTP Server versions 1.30.823 and 1.30.826 contain a buffer overflow vulnerability in the handling of the PORT command. By sending a specially crafted payload, an unauthenticated remote attacker can overwrite memory structures and execute arbitrary code with SYSTEM privileges.
The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer, leading to a buffer overflow.