Date: Thu, 12 Nov 1998 11:09:07 -0100
From: =?iso-8859-1?Q?Jes=FAs?= Cea =?iso-8859-1?Q?Avi=F3n?= <jcea@ARGO.ES>
To: BUGTRAQ@NETSPACE.ORG
Subject: Re: Xinetd /tmp race?
> BTW here's the patch:
[...]
> + if (!(stat(dump_file,
[...]
> dump_fd = open( dump_file, O_WRONLY + O_CREAT + O_APPEND,
Your patch is vulnerable to race attack. A script issuing "kill -HUP"
and creating links in "/tmp" will succeed in the long run.
Try open with O_CREAT|O_EXCL or lstat+open+fstat.
--
Jesus Cea Avion _/_/ _/_/_/ _/_/_/
jcea@argo.es http://www.argo.es/~jcea/ _/_/ _/_/ _/_/ _/_/ _/_/
_/_/ _/_/ _/_/_/_/_/
PGP Key Available at KeyServ _/_/ _/_/ _/_/ _/_/ _/_/
"Things are not so easy" _/_/ _/_/ _/_/ _/_/ _/_/ _/_/
"My name is Dump, Core Dump" _/_/_/ _/_/_/ _/_/ _/_/
"El amor es poner tu felicidad en la felicidad de otro" - Leibnitz
