Check or Attack Name: ftprnfr

Some versions of wu-ftp allow RNFR commands to overwrite or rename files even when these commands have violated file permissions. This issue occurs in wu-ftpd version 2.4 and earlier.

Upgrade to the latest release of Wu-FTPd available.

Academ Consulting Services, WU-FTP Server Software Release Information, http://ftp.academ.com/academ/wu-ftpd/release.html