Category: security

Using the radare2 snap package

radare2 is a tool for reverse-engineering software. It is quite versatile, and can deal either with binary files of executable code, or even attach to a running process. Packaging (making available an installation package for end-users) is always an issue, especially when the software gets updated often. There is in the works a snap package …

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Permanent link to this article: https://blog.simos.info/using-the-radare2-snap-package/

A network-isolated container in LXD

In this post we see how to get different types of network-isolated containers in LXD. Even if you are not interested in such things, doing this tutorial will help you understand better LXD proxy devices. LXD container with no networking To get a LXD container without networking, you omit the networking configuration in the profile …

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Permanent link to this article: https://blog.simos.info/a-network-isolated-container-in-lxd/

How to use virtual machines in LXD

Update 22 May 2020: The Ubuntu container images have been updated to install on first boot the LXD Agent in the VM. The corresponding section below has been updated so that you can skip the manual step, if your VM image does it for you. Update 22 May 2020: See also the tutorial at https://discuss.linuxcontainers.org/t/running-virtual-machines-with-lxd-4-0/7519 …

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Permanent link to this article: https://blog.simos.info/how-to-use-virtual-machines-in-lxd/

Discussion on running X11 applications from within LXD system containers

With LXD, you can create system containers. These system containers are similar to virtual machines, while at the same time they are very lightweight. In a VM, you boot a full Linux kernel and you run your favorite Linux distribution in a virtualized environment that has a fixed disk size and dedicated allocation of RAM …

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Permanent link to this article: https://blog.simos.info/discussion-on-running-x11-applications-from-within-lxd-system-containers/

Testing CVE-2019-11043 (php-fpm security vulnerability) with LXD system containers

CVE-2019-11043 is a buffer overflow in php-fpm that under certain conditions, can lead to remote execution. There is an exploit at PHuiP-FPizdaM that targets certain nginx and php-fpm configurations. On their page, the describe how to use Docker to test this exploit. In this post, we use LXD to test the exploit and verify whether …

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Permanent link to this article: https://blog.simos.info/testing-cve-2019-11043-php-fpm-security-vulnerability-with-lxd-system-containers/

Cloud-init support in LXD container images

cloud-init is a tool to help you customize cloud images. When you launch a cloud image, you can provide to it with your cloud-init instructions, and the cloud image will execute them. In that way, you can start with a generic cloud image, and as soon as it booted up, it will be configured to …

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Permanent link to this article: https://blog.simos.info/cloud-init-support-in-lxd-container-images/

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