bin/96993: /var/yp/securenets does not function in ypbind on 6.0 and 5.3

[Hokan]

>Number:         96993
>Category:       bin
>Synopsis:       /var/yp/securenets does not function in ypbind on 6.0 and 5.3
>Confidential:   no
>Severity:       critical
>Priority:       medium
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Mon May 08 19:10:18 GMT 2006
>Closed-Date:
>Last-Modified:
>Originator:     Hokan
>Release:        6.0 and 5.3
>Organization:
University of Minnesota
>Environment:
FreeBSD rapid.enet.umn.edu 6.0-RELEASE FreeBSD 6.0-RELEASE #0: Fri Jan 20 12:01:56 CST 2006     root at rapid.enet.umn.edu:/usr/src/sys/i386/compile/RAPID  i386

FreeBSD temp1.enet.umn.edu 5.3-RELEASE FreeBSD 5.3-RELEASE #1: Tue May 24 14:49:50 CDT 2005     root at temp1.enet.umn.edu:/usr/src/sys/i386/compile/TEMP1  i386

>Description:
securenets file is ignored by ypserv.  It is (properly?) used by rpc.yppasswdd.

On these releases anyone on the net can query NIS maps.  In a mixed environment, like ours, the passwd map includes passwords.  So anyone can look at our encrypted passwords.
>How-To-Repeat:
Set up a NIS server with a restrictive securenets file.  Bind to that server with a client not authorized with securenets.
>Fix:
Workaround:  use hosts.allow
>Release-Note:
>Audit-Trail:
>Unformatted: