DaemonForums  

Go Back   DaemonForums > OpenBSD > OpenBSD Security

OpenBSD Security Functionally paranoid!

Reply
 
Thread Tools Display Modes
  #1   (View Single Post)  
Old 2nd March 2012
aleunix aleunix is offline
Real Name: Alessandro
Spam Deminer
 
Join Date: May 2008
Location: Italy
Posts: 224
Thanked 3 Times in 3 Posts
Default ASLR (Address Space Layout Randomization): i386 PAE vs 64 bit

As i discovery casually, using the last openbsd snapshot, starting from the new release probably the i386 will use PAE as default.
I already known that PAE is useful for give the possibility at 32 bit OS (using a pagination, as happen on the past on DOS) more then 4 gb of Ram but after some futher research, using as starting point the presentation give from jggimi's:
PAE for OpenBSD/i386, Michael Shalayeff
I was curious about the improvement security using the NX bit
and after a jump on:
Memory allocators in modern Operating Systems, Ariane van der Steldt
I discovery the ASLR.
On this article The PIE is not exactly a lie… where i think the general concept remain safe, despite speak about linux, was said that the few registry present on x86 platform make this solution less efficient (about performance) so even with system with less then 4 gb is better going directly for a 64 bit system.
Now i would like understand if PAE have a positive effect even from this point of view and which problematic the use of PAE could give at applications, for example i known that can give problem at some driver, but i don't known much about eventual other issue with other things.
Or if the 64bit remain the same the prefer choice even on low memory system for avoid eventual problems with certain software.
Reply With Quote
Reply

Tags
64bit, address space layout randomization, aslr, i386, pae

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
ASLR to be mandatory for binary Firefox extensions J65nko News 1 28th February 2012 03:33 PM
Delete all you like, but it won't free up space ; You've been (de)duped ... J65nko News 2 15th February 2011 11:08 PM
Span Disk Space plexter OpenBSD Packages and Ports 8 20th November 2009 08:06 PM
no space left on drive while installing? knasbas OpenBSD Installation and Upgrading 2 20th July 2009 09:50 PM
Disk space gone missing EricM FreeBSD General 0 26th February 2009 02:25 AM


All times are GMT. The time now is 06:57 PM.


Powered by vBulletin® Version 3.8.4
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Content copyright © 2007-2010, the authors
Daemon image copyright ©1988, Marshall Kirk McKusick