From owner-freebsd-security Fri May 26 8:46:35 2000 Delivered-To: freebsd-security@freebsd.org Received: from adm.sci-nnov.ru (adm.sci-nnov.ru [195.122.226.2]) by hub.freebsd.org (Postfix) with ESMTP id 57B1537BD99 for ; Fri, 26 May 2000 08:46:27 -0700 (PDT) (envelope-from 3APA3A@SECURITY.NNOV.RU) Received: from anonymous.sandy.ru (anonymous.sandy.ru [195.122.226.40]) by adm.sci-nnov.ru (8.9.3/Dmiter-4.1) with ESMTP id TAA08439; Fri, 26 May 2000 19:43:54 +0400 (MSD) Date: Fri, 26 May 2000 19:43:57 +0400 From: 3APA3A <3APA3A@SECURITY.NNOV.RU> X-Mailer: The Bat! (v1.41) Reply-To: 3APA3A <3APA3A@SECURITY.NNOV.RU> Organization: Sandy Info X-Priority: 3 (Normal) Message-ID: <11822.000526@sandy.ru> To: "~jim" Cc: VULN-DEV@SECURITYFOCUS.COM, freebsd-security@FreeBSD.ORG Subject: Re: Local DoS : RedHat 6.0 In-reply-To: <20000523214556.A4977@quebix.dyndns.org> References: <20000523214556.A4977@quebix.dyndns.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: owner-freebsd-security@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org Hello ~jim, Same results are under FreeBSD 3.2 with XFree86 3.3.3.1 and FreeBSD 4.0 with XFree86 3.3.6, so it seems to be common X(Free86 ?) problem. Since X server can be launched via telnet session it's not necessary to be console user to crash console this way. P.S. no reaction on Ctrl+Alt+Backspace or Ctrl+Alt+del, no X server, xdm or any other X processes to kill, but host is alive, you can startx again via telnet to solve problem. 24.05.00 5:45, you wrote: Local DoS : RedHat 6.0; ~> While killing yet another zombie Netscape process, I made the mistake of ~> typing "kill -9 -1 " as opposed to the normal "kill -9 ." For ~> obvious reasons, this attempted to kill every process owned by my user ~> and hung the entire system in the process. (aka. I couldn't even switch ~> to another console to attempt recovery.) Unfortunately the only way to ~> recover was to "hard boot" the system and run the risk of corrupting my ~> root partition in the process. (Of course with my luck it corrupted.) ~> I actually noticed this "bug" about a year ago, but since forgot about ~> it. From what I've experienced, it definitely happens when a user types ~> "kill -9 -1" while in RedHat 6.0's Gnome/Enlightenment or Afterstep, ~> however I haven't tested any other window managers or versions of Linux. /3APA3A http://www.security.nnov.ru To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-security" in the body of the message