SELinux for Gentoo Hardened

Recently, most of the SELinux-related ebuilds from the hardened overlay have been moved to the official Portage tree. Hopefully, this will trigger more people / organizations to try Gentoo Hardened with SELinux and help us improve the ebuilds. They're still marked as \~arch (as they should be). The draft SELinux handbook …

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"Gentoo in production?" Oh no, not again...

I think it is that time of the year again, where people get some crazy ideas. Again I discussed the what must be the gazillion-th time I've been asked "Do you think Gentoo is ripe for use in production?". Honestly, I always tell myself to ignore those discussions but I've …

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Confining user applications

Ever since I started using SELinux, I'm getting more and more fond of what it can do for (security) administrators. Lately, I've started confining user applications (like skype) in the idea that I do not want any application connecting to the Internet or working with content received from untrusted sources …

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Why I have backups

You often read stories about people who have data loss and did not keep any (recent) backups, and are now fully equipped with a state-of-the-art backup mechanism. So no - no such failure story here but an example why backups are important.

Yesterday I had a vicious RAID/LVM failure. Due …

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cvechecker 2.0 released

Okay, enough play - time for a new release. Since cvechecker 1.0 was released, a few important changes have been made to the cvechecker tools:

  • You can now tell cvechecker to only check newly added files, or remove a set of files from its internal database. Previously, you had to …
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Delta processing in cvechecker

The cvechecker application will support delta file processing as well as higher version matching with its next release. The functionality is currently in version control and I still have to work out quite a few things before they can go live, but the functionality is there.

Now why would these …

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SELinux enforcing for console activity

I'm now able to boot into my system with SELinux in enforcing mode (without unconfined domains), do standard system administration tasks as root / sysadm_r (including the relevant Portage activities) and work as a regular user as long as I don't want to run in Xorg. I'm not going to focus …

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Risk identification

Risk identification is a difficult subject. Analysts need it to defend mitigation strategies or to suggest investments. Yet risk identification is often a subjective method, especially in the IT industry. How do you give a number on a certain risk? When do you believe that that number exceeds a threshold …

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cvechecker 1.0 released

With only a few small bugfixes between this release and the previous one, cvechecker 1.0 has finally been released. It runs fine on my few systems and I have not gotten any bugreports from other users anymore. It can definitely need more rules to identify installed software (those rules …

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