Subject: Possible bug with ls or ftpd ?
To: None <netbsd-bugs@netbsd.org>
From: Frank DENIS \(Jedi/Sector One\) <j@4u.net>
List: netbsd-bugs
Date: 03/15/2001 09:49:55
Hello, and sorry if this isn't the right list to post this.
I'm not a NetBSD user, however, I just noticed something strange on the
ftp.netbsd.org FTP server :
ftp ftp.netbsd.org
230 Guest login ok, access restrictions apply.
Remote system type is UNIX.
Using binary mode to transfer files.
ftp> ls */../*/../*/../*/../*/../*/../*/../*/../*/../*/../*/../*/../*
229 Entering Extended Passive Mode (|||62254|)
200 EPRT command successful.
Then, the connection freezes for a while and the client aborts with :
421 Service not available, remote server timed out. Connection closed
I guess the command takes a lot of CPU time, and a possible DOS can follow.
Please apologize if this is a known bug, but I have no NetBSD system to
check if this is a real issue or if I'm mistaken.
Best regards,
--
-=- Frank DENIS aka Jedi/Sector One < spam@jedi.claranet.fr > -=-
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