Subject: security/6918: encrypted (kerberized) telnet does not work to machine pools
To: None <>
From: Tracy J. Di Marco White <>
List: netbsd-bugs
Date: 01/31/1999 12:07:59
>Number:         6918
>Category:       security
>Synopsis:       encrypted telnet fails when telneting to a pool of machines
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    security-officer (NetBSD Security Officer)
>State:          open
>Class:          change-request
>Submitter-Id:   net
>Arrival-Date:   Sun Jan 31 10:20:00 1999
>Originator:     Tracy J. Di Marco White
Iowa State University Computation Center
>Release:        1998-12-20
System: NetBSD 1.3I NetBSD 1.3I (SOLSTICE) #2: Wed Dec 16 21:42:16 CST 1998 i386

telneting to a name that represents a round robin of machines causes the
encryption to fail.
using telnet in domestic, telnet to a pool of machines represented by one name.
Do a reverse name lookup to get the true name of the host, in case a name
with multiple IP addresses is found on the name->addr query.

*** commands.c.orig     Sat Jan 30 14:29:41 1999
--- commands.c  Sun Jan 31 11:52:28 1999
*** 2389,2394 ****
--- 2389,2395 ----
  #else	/* defined(h_addr) */
		memmove((caddr_t)&sin.sin_addr, host->h_addr, host->h_length);
  #endif	/* defined(h_addr) */
+		host = gethostbyaddr((char *)&sin.sin_addr, 4, AF_INET);
		strncpy(_hostname, host->h_name, sizeof(_hostname));
		_hostname[sizeof(_hostname)-1] = '\0';
		hostname = _hostname;