Date: Fri, 10 Apr 1998 12:56:01 +0300 (EEST) From: Timo J Rinne <tri@iki.fi> To: Max Euston <meuston@jmrodgers.com> Cc: freebsd-bugs@FreeBSD.ORG Subject: RE: bin/6254: ftp client follows NULL pointer Message-ID: <199804100956.MAA13090@pooh.tky.hut.fi> In-Reply-To: <01BD63C9.148B6D20.meuston@jmrodgers.com> References: <01BD63C9.148B6D20.meuston@jmrodgers.com>
next in thread | previous in thread | raw e-mail | index | archive | help
Max Euston writes:
> Are you sure you are running 'ftp' (client) *from* a FreeBSD box :-)? I
> have seen this happen when running 'ftp' from another system to connect to
> 'ftpd' (server) on a FreeBSD box.
Yes.
>>>>>>>>>>>>>>>>>> C U T H E R E >>>>>>>>>>>>>>>>>>
926.pooh:~> uname -a
FreeBSD pooh.tky.hut.fi 3.0-971225-SNAP FreeBSD 3.0-971225-SNAP #0: Thu Jan 8 19:33:22 EET 1998 tri@pooh.tky.hut.fi:/usr/src/sys/compile/POOH i386
928.pooh:~> ftp -d 127.1
Connected to 127.1.
220 pooh.tky.hut.fi FTP server (Version 6.00) ready.
Name (127.1:tri):
# Control-D here----------^
---> USER °ΝΏ
331 Password required for °ΝΏ.
Password:
# Control-D here--^
---> PASS XXXX
530 Login incorrect.
ftp: Login failed.
---> SYST
215 UNIX Type: L8 Version: BSD-199506
Remote system type is UNIX.
Using binary mode to transfer files.
ftp>
# Control-D here--^
---> QUIT
221 Goodbye.
928.pooh:~>
>>>>>>>>>>>>>>>>>> C U T H E R E >>>>>>>>>>>>>>>>>>
> If this is the case, I don't think that the 'ftpd' server on FreeBSD cou
> ld/should try to verify the user name (feel free to convince me otherwise
> :-)). If other clients ('ftp') send 'USER <garbage>', how would we verify
> user names with non-ascii character sets (i.e. with high bit set)? (I am
> by no means an expert when it comes to non-US character sets).
So, in FreeBSD 3.0 current (972512) and for example NetBSD-1.3 it
forks as above. I've added some comments to make it more readable.
Should I really read the source?
Ok. I do it. Return value of fgets in line 260 of util.c in ftp
client source is not checked.
Now it should be straightforward!
//Rinne
To Unsubscribe: send mail to majordomo@FreeBSD.org
with "unsubscribe freebsd-bugs" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?199804100956.MAA13090>