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Date:      Thu, 24 Sep 1998 19:09:54 -0500 (CDT)
From:      toasty@dragondata.com
To:        FreeBSD-gnats-submit@FreeBSD.ORG
Subject:   bin/8042: If pidentd dies, you must kill all telnetd and ftpd processes to restart it
Message-ID:  <199809250009.TAA12402@shell1.dragondata.com>

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>Number:         8042
>Category:       bin
>Synopsis:       If pidentd dies, you must kill all telnetd and ftpd processes to restart it
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    freebsd-bugs
>State:          open
>Quarter:
>Keywords:
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Thu Sep 24 18:00:01 PDT 1998
>Last-Modified:
>Originator:     Kevin Day
>Organization:
DragonData Internet Services
>Release:        FreeBSD 2.2.7-RELEASE i386
>Environment:



>Description:

If identd dies, you can't restart it without killing telnetd and ftpd

Identd croaked somehow...

bash-2.02# ps -auxwwww |grep "identd"
bash-2.02#

Restarting it doesn't work:

bash-2.02# /usr/local/sbin/identd -b -d -v
0 , 0 : ERROR : X-DBG : main: bind: : Address already in use

(same thing if you run identd through inetd - inetd complains it can't bind to the port)

When doing some poking:

bash-2.02# netstat -Aan |grep "*.113"
f4e50b00 tcp        0      0  *.113              *.*                LISTEN
bash-2.02# fstat |grep "f4e50b00"
root     telnetd     7597    6* internet stream tcp f4e50b00
stardust ftpd       25217    6* internet stream tcp f4e50b00
root     telnetd     1105    6* internet stream tcp f4e50b00
bash-2.02# kill 25217
bash-2.02# kill 7597
bash-2.02# kill 1105
bash-2.02# fstat |grep "f4e50b00"
bash-2.02# netstat -Aan |grep ".113" 
bash-2.02# /usr/local/sbin/identd -b -d -v

(identd now works)

This could almost be a DOS attack, if you can find a way of making identd die, you'll have to boot all the users off to restart it.

>How-To-Repeat:


>Fix:
	

>Audit-Trail:
>Unformatted:

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