Websites running Linux server are vulnerable to a new vulnerability known as “Dirty COW”. This vulnerability will let users on the server without root access to run commands as “root”. To check if your Linux kernel is vulnerable or not, run this command on the server to check kernel version. uname -rv If it shows you kernel version below this then your server is affected. 4.8.0-26.28 for Ubuntu 16.10 4.4.0-45.66 for Ubuntu 16.04 LTS 3.13.0-100.147 for Ubuntu 14.04 LTS 3.2.0-113.155 for Ubuntu 12.04 LTS 3.16.36-1+deb8u2 for Debian 8 3.2.82-1 for Debian 7 4.7.8-1 for Debian unstable How to fix this: Ubuntu/Debian server, run this command to update your kernel and reboot the server. sudo apt-get update && sudo apt-get dist-upgrade reboot: sudo reboot Follow this guide for other distros: http://tfus.me/DS9rb
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