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Author Archives: swift
SELinux’ 2011/07 releases now stable
A few minutes ago, I stabilized both the 2.20110726 policies as well as the SELinux userspace utilities that were stable (upstream) on 20110727. With the change, I also updated the Gentoo SELinux Handbook with the changes I presented on our … Continue reading
Posted in Hardened, SELinux
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Gentoo Hardened SELinux policies, rev 5
I’ve pushed out selinux-base-policy version 2.20110726-r5 to the hardened-dev overlay. It does not hold huge changes, most of them are rewrites or updates on pre-existing patches (on the SELinux policies) to make them conform the refpolicy naming conventions and other … Continue reading
Posted in Hardened, SELinux
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Upgrading GCC, revisited
Gentoo has, since long, had a GCC Upgrading guide. A long time ago, upgrading GCC required quite a lot of side activities and was often considered a risky upgrade. But times change, and so do the GCC upgrade cycles. Improved … Continue reading
Posted in Gentoo
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Mitigating risks, part 5 – application firewalls
The last isolation-related aspect on risk mitigation is called application firewalls. Like more “regular” firewalls, its purpose is to be put in front of a service, controlling which data/connections get through and which don’t. But unlike these regular firewalls, application … Continue reading
Posted in Architecture, Security
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Quickly setup a Gentoo system
In order to verify if the installation instructions in the Gentoo Handbook are still valid, and to allow me to quickly seed new Gentoo installations in a virtual environment, I wrote a very ugly (really) script to automatically “stage” a … Continue reading
Posted in Gentoo, Hardened
7 Comments
Power management guide updated
The Gentoo Power Management Guide is now updated. It is a full rewrite, focusing currently on two main toolsets: Laptop Mode Tools and cpufreqd. I was pleasantly surprised by the number of features that the laptop mode tools package provided. … Continue reading
Mitigating risks, part 4 – Mandatory Access Control
I’ve talked about service isolation earlier and the risks that it helps to mitigate. However, many applications still run as highly privileged accounts, or can be abused to execute more functions than intended. Service isolation doesn’t help there, and system … Continue reading
Posted in Architecture, Hardened, Security, SELinux
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Catching up
As mentioned on the gentoo-doc mailinglist, all documentation bugs (that we know of) related to openrc have been fixed. It was already a week like so, but the last dependency on our “tracker” bug was an open one (asking if … Continue reading
Mitigating risks, part 3 – hardening
While I’m writing this post, my neighbor is shouting. He’s shouting so hard, that I was almost writing with CAPS on to make sure you could read me. But don’t worry, he’s not fighting – it is how he expresses … Continue reading
Posted in Architecture, Security
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Mitigating risks, part 2 – service isolation
Internet: absolute communication, absolute isolation ~Paul Carvel The quote might be ripped out of its context completely, since it wasn’t made when talking about risks and the assurance you might need to get in order to reduce risks. But it … Continue reading
Posted in Architecture, Security
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