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Subject: i386/31771: PPP compares CHAP81 response case sensitive
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>Number:         31771
>Category:       i386
>Synopsis:       PPP compares CHAP81 response case sensitive
>Confidential:   no
>Severity:       serious
>Priority:       low
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Mon Nov 05 02:10:01 PST 2001
>Closed-Date:
>Last-Modified:
>Originator:     Willem Jan  Withagen
>Release:        FreeBSD 4.4-STABLE i386
>Organization:
VIA NET.WORKS Nederland b.v.
>Environment:
	FreeBSD 4.4-stable
	pptpclient 1.0.3
	Watchguard Firebox
		(Linux based firewall)

>Description:

	When building a PPTP VPN with the watchguard VPN service, 
	CHAP authentication is successfull but regardless the LCP connection
	is dropped. When turning on logging this displays as a warning where 
	both challenge responses are shown, and seem equal except for the case.

>How-To-Repeat:

	One needs a Watchguard (or perhaps Linux) firewall and build the 
	pptpclient configuration and connect with a pptp-enabled usercode 

>Fix:
	In /usr/src/usr.sbin/ppp/chap.c:line 905 insert a conversion for both
	answers to either upper or lowercase, and then compare.
	This fixes the problem and a working connection is than build.

	Not shure if the case conversion should take place somewhere else

>Release-Note:
>Audit-Trail:
>Unformatted:

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