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Xen exploitation part 1: XSA-105, from nobody to root

Dom0

Dom0is the initial virtual machine launched by Xen on boot. This is the most privileged guest and allows Xen administration. We chose to install Dom0 as a classical Debian 7.9.0.

Xen compilation asks for some dependencies:

apt-get build-dep xen

Once the dependencies are installed, compiling and installing Xen should be straightforward:

make install -j4 && update-grub

Reboot Dom0 and choose the right entry in grub. In order to use the xl command, the linker’s path must be adjusted. Also, the xencommons service needs to run:

echo "/usr/lib64" >> /etc/ld.so.conf insserv xencommons service xencommons start

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