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Category Archives: Gentoo
checksec kernel security
I have blogged about checksec.sh earlier before. Jono, one of the #gentoo-hardened IRC-members, kindly pointed me to its –kernel option. So I feel obliged to give its options a stab as well. So, here goes the next batch of OPE-style … Continue reading
emerge-webrsync and gpg verification
Gentoo has been working on its security from very early on. One of the (many) features it supports is to allow users to validate the state of the portage tree. Ebuild signing (where developers sign the Manifest file with their … Continue reading
Posted in Gentoo
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Preliminary SELinux MCS support in Gentoo Hardened
Users tracking the hardened-dev overlay for SELinux packages will notice yet another update on the selinux-base-policy package. This time however, the change is a little more than just a policy update. With this new revision, preliminary support for Multi-Category Security … Continue reading
Posted in Hardened, SELinux
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High level explanation on some binary executable security
One very important functionality offered by Gentoo Hardened is a specific toolchain (compiler, libraries and more) that contains patches to make the built binaries a bit more protected from certain vulnerabilities. Explaining all those in detail is too much for … Continue reading
Posted in Hardened, Security
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On the new SELinux profiles
Ever since Anthony put in the new SELinux profiles – which was long due – they have seen quite a few tests and the necessary, evolutionary updates. No changes that broke things, no oddities that would give a WTF to … Continue reading
Posted in Hardened
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Gentoo Hardened SELinux state
Since last post, we’ve been working on the further stabilization and bug fixing of the SELinux policies within Gentoo Hardened. You might have noticed that we started working on the QA of the packages, like I promised in the last … Continue reading
Posted in Hardened, SELinux, Uncategorized
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What’s next after stabilization?
The last few weeks have shown quite a few interesting improvements on Gentoo Hardened’s SELinux state. We now have improved (simplified) Gentoo profile support, supporting SELinux on no-multilib (an often requested feature, now finally in), we stabilized the 2.20101213 policies … Continue reading
Posted in Hardened
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SELinux file contexts
If you have been working with SELinux for a while, you know that file contexts are an important part of the policy and its enforcement. File contexts are used to inform the SELinux tools which type a file, directory, socket, … Continue reading
Posted in Hardened, SELinux
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SELinux Gentoo profile updates
The SELinux support within Gentoo Hardened is continuing to go forward. Anthony G. Basile has been working on the new SELinux Gentoo profiles which were in dire need of updates. With the rework, we’ll also support the AMD64 no-multilib environment … Continue reading
Posted in Hardened
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SELinux User-Based Access Control
Within the reference policy, support is given to a feature called UBAC constraints. Here, UBAC stands for User Based Access Control. The idea behind the constraint is that any activity between two types (say foo_t and bar_t) can be prohibited … Continue reading
Posted in Hardened, SELinux
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