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Hi. I'm jon.404, a Unix/Linux/Database/Openstack/Kubernetes Administrator, AWS/GCP/Azure Engineer, mathematics enthusiast, and amateur philosopher. This is where I rant about that which upsets me, laugh about that which amuses me, and jabber about that which holds my interest most: *nix.

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OpenBSD's W^X Policy

Posted 01-13-2015 at 10:22 PM by rocket357 (Musings on technology, philosophy, and life in the corporate world)
Updated 01-14-2015 at 10:57 AM by rocket357

http://marc.info/?l=openbsd-tech&m=142120787308107&w=2

OpenBSD has had userland "W^X" (Write XOR Execute, a policy in which memory pages can be marked writable OR executable, but never both at the same time. This policy defeats attacks that rely on an executable stack or other write-then-execute arrangements).

Now OpenBSD has applied W^X to the kernel (amd64 thus far) as well, along with ASLR and a few other improvements.

It's a great...

rocket357

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LOC hilarity

Posted 01-09-2015 at 05:35 PM by rocket357 (Musings on technology, philosophy, and life in the corporate world)
Updated 01-09-2015 at 05:47 PM by rocket357 (I can't English)

In a discussion on openbsd's tech@ mailing list, it was determined that ntpd-4.2.8 contained approximately 190k lines of code...a count that came up after the 8 vulnerabilities in ntpd were recently announced.

(DISCLAIMER: lines of code are difficult to count fairly, especially comparing one product to another, but this gives a rough "ballpark" idea of LOC).

Let's see if I can put this in perspective. ntpd checks and sets the time on a machine. In a nutshell,...

rocket357

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Views 1322 Comments 0 rocket357 is offline

Dear World

Posted 12-24-2014 at 06:47 PM by rocket357 (Musings on technology, philosophy, and life in the corporate world)

I survived another year. I know eventually you'll get the best of me, but until then better luck next go-round...

rocket357

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Took the Plunge

Posted 12-22-2014 at 12:13 AM by rocket357 (Musings on technology, philosophy, and life in the corporate world)
Updated 12-22-2014 at 12:42 AM by rocket357

I've run a tor relay over at Digital Ocean for a while now, and I finally decided to pull the plug on it. Digital Ocean announced up coming BSD support, and I waited with anticipation to see exactly how far they were willing to go with the BSDs...and let down that it was only FreeBSD support. (I've been running the tor node on Debian...not exactly ideal in my opinion, but it's been working well enough...I was really looking forward to switching the tor node over to OpenBSD...).

...

rocket357

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OpenBSD-STABLE Automated build script: 2

Posted 12-02-2014 at 05:18 PM by rocket357 (Musings on technology, philosophy, and life in the corporate world)

New and improved, with X included.

Code:

#!/bin/sh

set -e

export LOGFILE=/var/log/build_stable.log
export ARCH=`machine`

# DEFAULT: BUILD -STABLE (UPGRADE TO LATEST -RELEASE FIRST!!)
export BUILDVER=OPENBSD_`uname -r | tr '.' '_'`

cat > ${LOGFILE} << EOF


STABLE BUILD - `date` - `uname -a`


EOF

echo "Retrieving/Updating Sources for src ${BUILDVER}"

...

rocket357

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