lkml.org 
[lkml]   [2001]   [Oct]   [4]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: Security question: "Text file busy" overwriting executables but not shared libraries?


On Thu, 4 Oct 2001, Linus Torvalds wrote:

> The reason the kernel refuses to honour it, is that MAP_DENYWRITE is an
> excellent DoS-vehicle - you just mmap("/etc/passwd") with MAP_DENYWRITE,
> and even root cannot write to it.. Vary nasty.

<nit>
I _really_ doubt that something does write() on /etc/passwd. Create a
file and rename it over the thing - sure, but that's it.
</nit>

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2005-03-22 13:03    [W:0.205 / U:6.008 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site