Date: Mon, 28 Jan 2002 15:10:01 -0800 (PST) From: Giorgos Keramidas <keramida@ceid.upatras.gr> To: freebsd-bugs@FreeBSD.org Subject: Re: misc/34270: man -k could be used to execute any command. Message-ID: <200201282310.g0SNA1i63069@freefall.freebsd.org>
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The following reply was made to PR misc/34270; it has been noted by GNATS.
From: Giorgos Keramidas <keramida@ceid.upatras.gr>
To: Garrett Wollman <wollman@khavrinen.lcs.mit.edu>
Cc: bug-followup@freebsd.org
Subject: Re: misc/34270: man -k could be used to execute any command.
Date: Tue, 29 Jan 2002 01:04:36 +0200
On 2002-01-28 16:15:48, Garrett Wollman wrote:
> <<On Sat, 26 Jan 2002 09:40:06 -0800 (PST), Giorgos Keramidas <keramida@FreeBSD.ORG> said:
>
> > Here's a partial fix for the "apropos" and "whatis" options of man(1).
> > This leaves still 4 places where man/man.c uses do_system_command(),
> > since I need to understand the code before I make any changes. The
> > code of man.c is still vulnerable to environment variable tricks, but
> > at least it works with -f and -k options without problems:
>
> I would suggest that the apropos and whatis commands be run by their
> full path names, avoiding the exec?p functions. If they are running
> with privilege, the environment should be cleaned out as well.
OK, although the commands are not run with elevated priviledges, so
they're not dangerous (at least not in ways that I could think during
the past few days).
--
Giorgos Keramidas . . . . . . . . . keramida@{ceid.upatras.gr,freebsd.org}
FreeBSD Documentation Project . . . http://www.freebsd.org/docproj/
FreeBSD: The power to serve . . . . http://www.freebsd.org/
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