[6405] in bugtraq
Re: Majordomo /tmp exploit
daemon@ATHENA.MIT.EDU (Steven Pritchard)
Fri Mar 27 02:17:52 1998
Date: Thu, 26 Mar 1998 19:26:37 -0600
Reply-To: Steven Pritchard <steve@SILUG.ORG>
From: Steven Pritchard <steve@SILUG.ORG>
To: BUGTRAQ@NETSPACE.ORG
In-Reply-To: <Pine.LNX.3.96.980326144227.5149C-100000@main.tqgnet.com> from
Karl G - NOC Admin at "Mar 26, 98 03:03:28 pm"
Karl G - NOC Admin said:
> -=x-ploit=-
> create a symlink in /tmp to any majordomo file
> ex: ln -s /usr/lib/majordomo/majordomo /tmp/majordomo.debug
Looking at the latest version of majordomo (1.94.4), it seems the
problem isn't that bad. A well-configured majordomo is not
vulnerable. (By "well-configured", I mean where the admin has edited
majordomo.cf to change $TMPDIR to something not world-writable. If
you haven't done that yet, do it now.)
I did find one case where majordomo doesn't honor the $TMPFILE
variable though. Apply the following patch to fix it:
-- Cut here --
--- majordomo.pl.orig Wed Aug 27 09:58:53 1997
+++ majordomo.pl Thu Mar 26 18:42:29 1998
@@ -324,7 +324,7 @@
}
# These are package globals referenced by &setlogfile and &log
-$log_file = "/tmp/log.$$";
+$log_file = "$main'TMPDIR/log.$$";
$log_host = "UNKNOWN";
$log_program = "UNKNOWN";
$log_session = "UNKNOWN";
-- end --
Enjoy.
Steve
--
steve@silug.org | Linux Users of Central Illinois
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Steven Pritchard | http://www.luci.org/ for more info
