From: Erik Hensema <erik@hensema.net>
To: linux-kernel@vger.kernel.org
Subject: Re: How to fix the ptrace flaw without rebooting
Date: Thu, 3 Apr 2003 12:30:05 +0000 (UTC) [thread overview]
Message-ID: <slrnb8oaad.j0h.erik@bender.home.hensema.net> (raw)
In-Reply-To: <200304030708_MC3-1-32C2-5A8A@compuserve.com>
Chuck Ebbert (76306.1226@compuserve.com) wrote:
> Author: Chuck Ebbert
> Adapted from: Phrack Inc., Volume 0x0b, Issue 0x3a, Phile #0x07
> Directions: Run this program as root on an x86 machine.
> It will disable the ptrace system call, thus
> fixing the Linux 'ptrace flaw'. (It will also
> break strace, debugging tools and User Mode Linux.)
> WARNING: Your computer may crash or do other strange things
> if you run this program as root. No warranty.
If you can't reboot to apply a security fix, you've got a serious problem.
A better fix in a running system is to simply disable dynamic module
loading: echo /no/such/file > /proc/sys/kernel/modprobe
At the very least you can be sure your machine won't crash this way ;-)
--
Erik Hensema <erik@hensema.net>
next prev parent reply other threads:[~2003-04-03 12:18 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-04-03 12:05 Chuck Ebbert
2003-04-03 12:30 ` Erik Hensema [this message]
2003-04-04 6:19 ` Nuno Silva
2003-04-04 11:18 Chuck Ebbert
2003-04-04 11:15 ` Alan Cox
2003-04-06 1:28 ` Paul Jakma
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