From owner-freebsd-bugs  Wed Jan 28 03:20:03 1998
Return-Path: <owner-freebsd-bugs@FreeBSD.ORG>
Received: (from majordom@localhost)
          by hub.freebsd.org (8.8.8/8.8.8) id DAA12136
          for freebsd-bugs-outgoing; Wed, 28 Jan 1998 03:20:03 -0800 (PST)
          (envelope-from owner-freebsd-bugs@FreeBSD.ORG)
Received: (from gnats@localhost)
          by hub.freebsd.org (8.8.8/8.8.8) id DAA12130;
          Wed, 28 Jan 1998 03:20:02 -0800 (PST)
          (envelope-from gnats)
Received: (from nobody@localhost)
          by hub.freebsd.org (8.8.8/8.8.8) id DAA11874;
          Wed, 28 Jan 1998 03:16:42 -0800 (PST)
          (envelope-from nobody)
Message-Id: <199801281116.DAA11874@hub.freebsd.org>
Date: Wed, 28 Jan 1998 03:16:42 -0800 (PST)
From: paulo@fiscodata-pr.netpar.com.br
To: freebsd-gnats-submit@FreeBSD.ORG
X-Send-Pr-Version: www-1.0
Subject: bin/5591: Trouble with LD_PRELOAD environment variable and man pages
Sender: owner-freebsd-bugs@FreeBSD.ORG
Precedence: bulk
X-Loop: FreeBSD.org


>Number:         5591
>Category:       bin
>Synopsis:       Trouble with LD_PRELOAD environment variable and man pages
>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:   Wed Jan 28 03:20:01 PST 1998
>Last-Modified:
>Originator:     Paulo Cesar Pereira de Andrade
>Organization:
Particular
>Release:        -CURRENT and -STABLE
>Environment:
FreeBSD fiscodata-pr.netpar.com.br 2.2.5-STABLE #0: Wed Dec 31 09:08:35 GMT 1997    root@fiscodata-pr.netpar.com.br:/usr/src/sys/compile/OTIMIZADO  i386
>Description:
While building a libXaw replacement, I found a problem with man, that
I think can be exploitable. When setting the LD_PRELOAD environment
variable to "./libXaw.so.6.0:/other/shared/libs" and typping:
% man XGetGeometry, the XGetGeometry man page is truncated to
zero lines. This can be done, I think, in any man page if it is
not in the <base>/man/cat?/ directory, by any user.
>How-To-Repeat:
% setenv LD_PRELOAD '/usr/X11R6/lib/libXaw.so.6.?'; man XGetGeometry
Formatting page, please wait...ld.so failed: Undefined symbol "_XtStrings" in groff:/usr/X11R6/lib/libXaw.so.6.1
<Other error messages>
% unsetenv LD_PRELOAD; man XGetGeometry
%
>Fix:

>Audit-Trail:
>Unformatted: