Bug 23120

Summary:	'\|more' takes up to 100% system resources
Product:	Base System	Reporter:	xeno <xeno>
Component:	misc	Assignee:	freebsd-bugs (Nobody) <bugs>
Status:	Closed FIXED
Severity:	Affects Only Me
Priority:	Normal
Version:	4.0-RELEASE
Hardware:	Any
OS:	Any

Description xeno 2000-11-27 03:20:01 UTC

usage of commands with '|more' takes up to 100% of system resources, 
which may be considered as a DoS

Fix: 

dunno. :(
How-To-Repeat: open MS Windows telnet, then 'telnet' to FreeBSD machine, then 'su root', 
start, for example, "ps -ax | more" and close Windows telnet with a 
simple button-click (not disconnect). Next morning open "telnet" again 
and see "top". On my machine "more" took up to 100% of system resources.

Comment 1 iedowse freebsd_committer

2001-11-18 01:23:54 UTC

State Changed
From-To: open->feedback


FreeBSD's `more' is now `less', so I suspect this problem may 
be fixed. Could you try a more recent release and let us know 
if the problem is fixed?

Comment 2 ashp freebsd_committer

2002-01-16 22:34:44 UTC

State Changed
From-To: feedback->closed

I was unable to reproduce this, testing with windows telnet and putty.  No 
feedback also, so I am closing.