From tep@SDSC.EDU  Fri May 29 16:39:35 1998
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Date: Fri, 29 May 1998 13:39:27 -0700
From: Tom Perrine <tep@SDSC.EDU>
Reply-To: tep@SDSC.EDU
To: krb5-bugs@MIT.EDU
Subject: kftpd supports anonymous, but is not "strong"
X-Send-Pr-Version: 3.99

>Number:         602
>Category:       krb5-appl
>Synopsis:       kftpd supports anonymous, but is not "strong"
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    krb5-unassigned
>State:          open
>Class:          change-request
>Submitter-Id:   unknown
>Arrival-Date:   Fri May 29 16:40:01 EDT 1998
>Last-Modified:
>Originator:     Tom Perrine
>Organization:
San Diego Supercomputer Center, San Diego CA
>Release:        krb5-1.0.5
>Environment:
	
System: SunOS galt 5.5.1 Generic_103640-18 sun4u sparc SUNW,Ultra-1
Architecture: sun4

>Description:
The kftpd supports anonymous login, but is based on rather old
code, and does not have the features to support this well. The WU-FTPD
and the logdaemon ftpd are both better options.

This patch allows a site to force non-support of anonymous
FTP even if a host is mis-configured by either its owner or
an intruder.

This is a simple way to add defense in depth.  Also, anonymous login
attempts to a Kerberos FTP server in fall-back mode might be a good tripwire.


>How-To-Repeat:
	Use kftp and log in as anonymous or ftp.
>Fix:

diff -r src.original/appl/gssftp/ftpd/ftpd.c src/appl/gssftp/ftpd/ftpd.c
564a565,573
> #ifdef NOANONYMOUS
> 		reply(530, "User %s access denied.", name);
> 		if (logging)
> 			syslog(LOG_NOTICE,
> 			    "ANONYMOUS FTP LOGIN REFUSED (not supported) FROM %s, %s",
> 			    remotehost, name);
> 		pw = (struct passwd *) NULL;
> 		return;		/* NOTE: cheap sleazy exit if we don't support ANONYMOUS */
> #else
573a583
> #endif
574a585
> 

>Audit-Trail:
>Unformatted: